2015 GMC SIERRA 1500 Service Brakes Problems

Starting vehicle in parking lot and backing out of parking space. Brakes failed and truck continued to roll backwards almost hitting a pedestrian. I was able to stop hard on the pedal and stop the vehicle. This has happened several times. I have a steep driveway and backing down to the street the brake pedal will unexpectedly have little resistance and the truck will continue to roll into the street almost hitting oncoming traffic.

Brake pedal pivot nut came loose and fell off while driving.

I was driving pulling an empty small U-Haul trailer and attempted to pull in to a fuel station when my brake became impossible to depress. I barely was able to miss hitting gas pumps and ran down into a ditch before the truck stopped. I informed the dealership where I had just purchased this truck used. I took it to their service department and I was told there was no issues with the brakes. They had to have this recall bulletin in their computer system yet failed to make me aware or to perform this recall or report it to GM. The problem continues to worsen to the point I am scared to drive it. I almost rear ended another car at a stoplight yesterday because I was unable to depress the brake pedal. I stood on the brake and heard an electronic sound but finally came to a stop.

I've had problems with the brakes for several years, the pedal is very hard at low speed. I've seen a recall but not on my car???

"NHTSA campaign: 19V645000 AS the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash." Our vehicle was serviced and repaired for this problem under the recall on 9/6/2019, however, it is now happening again. Is there a second recall for this problem, and/or what can be done to remedy the defective equipment?

upon applying brake pedal at low speeds the brake is hard to depress and "choppy" in reacting. this seems same as N192268490 Increased Brake Pedal Effort yet the gmc denali is not apparently in the recall. This has happened on several occassions.

The brake system failed in a parking lot three times within a month. It’s related to the special policy and recall regarding the vacuum and the loss of brakes at slower speeds and in reverse. The first two accidents were very minor creating no damage. The third one was at 10mph when I lost my brakes and crashed into a concrete barrier in a parking structure causing significant damage to my truck. I did not get injured but I have a wife and two kids that I am so grateful were not in the truck for the third one with major damage. With that being said my son was in the truck the second time it happened when I crashed into a parked vehicle in a parking lot because I was unable to stop which made me very frustrated and worried for my families safety in my truck. The first accident was in a parking lot where I was backing up and lost the brakes and crashed into a building which is my veterinary office causing damage to the building. Therefore after the first crash due to this issue I have decided that driving with my family in the truck is not an option anymore. It is very disappointing that a truck I purchased for the functionality and safety of having my wife and kids in it is no longer safe for passengers or myself in it. This problem is very reproducible and is a major concern for my family and my safety. It was towed to a GMC dealership in Waukesha and is being inspected and they have stated it is reproducible. No warning lamps or messages were indicated for this issue. The truck will next need to get towed to Crash Champions auto body repair to ultimately get repaired which will take another month. All of this is a major inconvenience as I am a full time firefighter and in paramedic school as well. Not having a reliable safe vehicle for an extended period of time has caused great stress and inconvenience to my family. I’m hoping and praying that something can be done about this quickly and promptly to make this right. Thank you.

Brakes fail at low speeds

Intermittently with slow driving such as parking maneuvers or creeping slow traffic at stop lights the brake pedal becomes very soft and depresses much more than normal and the brake action is decreased. Sometimes with this soft pedal it sounds like ABS is engaging. Pumping pedal sometimes restores brake performance.

It keep having this issue constantly every minute saying trailer brake system

low speed truck brake pedal becomes stiff and truck is hard to stop

Rainy road, 60mph on the hw with my family. Truck decides to engage stabilitrak or something to that feel and locked up the brakes. Talk about a scary moment with an 18 wheeler coming in hot behind you. Obviously, in the moment, I had no clue what was happening other than something with the truck was malfunctioning. This scenario could have gone wrong in so many ways. I'm honestly in shock someone has not been killed because of this?

The brake vacuum pump is failing. When in a parking lot the brakes get very hard al.ist causing an accident. There is no vacuum when trying to park in parking lot. The 2015 GMC Sierra had a recall for this but my VIN did not. Not sure why as it's failing too. I need my truck so will have it fixed today, but want a recall.

Constant “service trailer brakes” warning on dash. I Haven’t done anything to cause it.

The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the brake pedal was firm while being depressed. The contact stated that the failure occurred intermittently while parking or while at a stop. The brake pedal failed to operate as needed. The check engine warning light was illuminated. The engine power reduced message was displayed. The vehicle was taken to an independent mechanic, where it was diagnosed that the brake booster pump needed to be replaced. The vehicle was not repaired. The vehicle was taken to the local dealer however, the technician was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 66,476.

Mileage: 66,476

Body paint delaminating. Also, difficulty sometimes stopping vehicle extra length required to stop

Problem # 1At low speeds /parking I loose power that affects steering the radio and windows. I get a message on board stability warning message. Steering become hard and can’t control/turn the vehicle Problem #2 at low speeds /parking my brakes loose power I have to press brake really hard to stop truck.

In several occasions my brake when approaching stop sign or light and I hit my brakes more than once it goes to the floor and it become difficult to stop without having to push very hard on the brake pedal. It does it almost every time.

The contact owns a 2015 GMC Sierra 1500. The contact stated while driving 70 MPH and depressing the brake pedal, the vehicle would not slow down. The contact aggressively depressed on the brake pedal and the vehicle was able to stop as needed. The vehicle was taken to an independent mechanic to be diagnosed. The independent mechanic determined that the vehicle had experienced an unknown failure however, the vehicle was not repaired. The dealer was not contacted. The manufacturer was not notified of the failure. The failure mileage was 50,000.

Mileage: 50,000

SERVICE TRAILER BRAKING SYSTEM NOTICE CONTINUES TO POP UP ON THE DASH WHILE DRIVING.

Brake pedal effort is increased, pedal gets hard and vehicle is hard to stop. Happens at slow speed. intermittently.

Trailer brake system message keeps showing up on my dash and it’s not safely to drive

I tried to buy a car at car dealershipin lafayette oregon ( Pouya Auto sales) gmc sierra 2015 black . on the date 02/09/2023 . They soldme this car with ABS ,cruscontrol, presusre tires ligths on dashbord . the financial bank recomend me to bring the veicule back to the dealership to have them to fixed . . they didnt want to continue with the contract anymore and canseled . now they want to sell the truck to some one else . and is not safe to drive it with this isuuses

Hard break peddle at low speeds, break booster issue

Trailer Brake System Service.

When braking at low speeds I have no brakes to stop and i can feel a vibration in the brake pedal.

Brake pedal is hard to push at low speeds

At low speeds , like parking it lost all brakes. I have noticed a few times since the first. I see they had a recall for the brake vacumm pump but I cant find much on it

Brake vacuum fail, causing the brake pedal to become stiff and unable to stop the vehicle. This issue has been on the recall for the same year and make of truck as mine, yet mine is not eligible for this recall repair? Please help Thank you

The Truck has something wrong with the Trailer braking system. with no notice it display "Service Trailer Braking system" in the DIC. This will cause loss of brakes to the trailer and make it very difficult to stop with the trailer. Everything functions properly and at a random moment they will just stop working.

Trailer brake system Warning

Purchased GMC Sierra C1500 new in 2015 from a dealership in Orange County, CA. Experienced multiple issues over the past 4 years with the "Trailer Brake System" Service light and loud beeping which has created multiple safety issues making the vehicle undrivable at times. The last incident was while on a cross country road trip through extreme heat in the Southwest from Texas to California in June and most recently while visiting Orange County. The beeping noise almost caused a couple of accidents as the hands free phone system was inoperable due to the loud warning beeping noise as it went on and off about 50 times. We were required to take several risky maneuvers to pull the vehicle off heavy highway traffic at high speeds to stop the engine and restart in an attempt to reset the warning beeping system without success. The truck was checked in for service on 07.20.2022 at Tustin Buick GMC. Mr. John Boozer, Service Advisor. 714.669.3699. The total cost of repairs is $465 plus car rental of $80. Additional costs in April of 2019 for the repairs included fuse replacement, check of wiring harness and attempt to stop the beeping noise was $150. The defective wiring harness originally installed by GMC when the truck was built will be preserved and is available should your agency request it. Total costs out of pocket to replace or fix this factory defective part is $695. GMC has made no effort to address this issue or offer any recall notices related the failure of the "Trailer Brake Warning System". Thank you for your attention to this matter.

On July 18, 2022 my trailer brakes suddenly stopped functioning ( a few hours from home) Not only did did the trailer brakes stop functioning, but this warning message didn't popped up just one time, it kept coming again and again and again and again, relentlessy chiming and distracting me from driving. it covered my speedometer readout. it prevented me from receiving or making voice commands. the service warning chime also prevented the turn signal from functioning. So for a full 4 hours I was constantly reminded and was unable to receive calls or make voice commands. i absolutely wont hesitate to say the vehicle was not safe to drive in that condition. your vehicle's defect endangered my life. I will not hesitate to say your vehicle was not safe to drive in that condition. Your vehicles defect endangered my life! Lastly, my vehicle did not want to start the next morning!!

My truck has just over 54,000 miles on it. I bought it new and have treated it well. It's my "Sunday" truck. Without warning, yesterday while carrying my wife to a doctor's appointment, as I pulled into a parking space to park ... I had almost no brakes. I actually jumped on the emergency brake to aid me in getting stopped. After my wife had gone in for her appointment, I slowly moved the truck around the open areas of the parking lot trying to figure out what the problem was. I checked the brake fluid, looked to make sure I hadn't lost a brake pad or something else weird and found that everything was good. What I did find though was that the only time the truck had any issue was when I was moving under maybe 4 or 5 mph. And in fairness ... I discovered the truck did have some tiny (but I do mean tiny) amount of braking ability at that low speed, but to say that the experience was unnerving would be a terrible understatement. Had someone been standing between me and the vehicle I was parking in front of when I experienced this, there is absolutely no doubt in my mind that I would have pinned them between our vehicles, or God forbid, something worse. I don't know what's going on here, but there's definitely something going on with the brake system at low speed on this GMC.

Trailer brake service alarm. Replaced module under stair tire and dash board. Still in alarm, internet says it’s a common problem with wiring harness failure. Many others have some problem.

I keep getting a dashboard warning saying "service trailer brake system". from what i have found, this is due to an inexpensive wiring harness being used. It's very distracting and even if i dismiss the error, it keeps coming back up.

Was driving in a parking lot. When driving slow My brakes got stiff and I couldn’t stop it was so stiff it didn’t want to stop I had my kids and wife. Scary and unsafe. Told GMC there was a recall they said it was already fixed with my situation. But just cuz you see on the computer it doesn’t mean it’s fixed. So they said I got to pay but it’s in a recall already but properly not reboot right.

Na

Unknown

The brake pedal gets hard to push down when slowing down and especially when backing up slowly. After looking into some things I'm pretty sure the problem is with the vacuum pump.

at first my brakes began locking up on the vehicle, almost as if they were pumped full and not able to press down any longer, shortly after that the stabilitrack light came on and white smoke began to come out of the exhaust as well as a slight shake in the engine, i immediately turned the vehicle off and parked it, mind you i bought the vehicle 1 day ago and it is already broke down, the issue is with gmc and these sensors they are using they are faulty engine reduces speed and it is not safe to say the least.not only that but had the exact same problems with my Gmc Acadia which i finally got the light to stop going off after replacing transmission, brake pedal position censor, as well as gas pedal position censor, also had the throttle body replaced, Do you all make products that are worth anything, nothing was ever done about the Acadia, the Gmc sierra is a 2015 with 70,000 miles on it this car should not be acting like this please contact me at [XXX] thank you so much for your time, also there are 14 recalls on this year truck yet mine shows that there are 0 recalls to be fixed I am wondering about this as well. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

Service Trailer Brake Brake System error keeps flashing.

The component that malfunctioned is the vehicle braking system at slow speeds. I first experienced the problem at a restaurant drive thru line. After several stops as the line advanced, the braking system failed (extremely hard pedal) and car kept advancing and if someone would have been directly in front of me ( at a normal distance for a drive thru ) I would have made contact with them at a slow speed. I checked with my dealer the next day and they said that there were no reported problems for this issue on my vehicle. No warning lamps or messages present but it seems to me to be similar to the recall ( N192268490 ) as it only happens at slow speed with repeated application of the brake. There were no symptoms of the problem prior to this incident and it took me completely by surprise. I took the vehicle in to a service facility and they test drove it and said that they did not recreate the failure but I believe that they didn't try repeated braking at slow speed as I requested. I feel that there is a problem and that it only shows up during the aforementioned driving conditions. I have checked your website and the manufacturers and my truck VIN doesn't show up for their computer reprogramming recall but think that maybe it should.

Trailer Brake system warning continues to pop up on my dash along with the chimes. Not sure if this will affect my braking or not, but I pull a 32' camper and am continually concerned about this warning. It happens randomly not just when towing a camper. It has been in to a GMC dealer and they say nothing can be done about it due to no recalls.

Alert of “service trailer brake system” keeps beeping and alerting many times while driving

The first issue is popping coming from the front end of the vehicle causing a steering issue. This has been "repaired" multiple times with no resolution. Every time the popping occurs which is almost every turn the steering wheel will not turn. The next issue is the radio is causing driver distraction by changing stations and screens not just on the display itself but the instrument cluster as well. The radio has been replaced once due to the fact it was on backorder for 6 months another attempt has not been made. The third issue is the brakes have failed at slow speeds no warning lights were on, they just stopped working in the Mcdonald's drive-through. I had to get out of line to keep from rear-ending the person in front of me. Now, after that experience, the ABS light has come on and the service StabiliTrak flashes on the dash as well as parking assist off, everytime I hit the brakes. .

Brakes do not work under slow speeds. Pumping breaks at slow speeds (parking lot speeds) causes break pedal to stiffen and the vehicle's breaks are not responsive. When this happens, I feel what seems to be ABS engaging (break pedal pulsates). The pulsating is only noticable in the break pedal. This behavior seems more prevalent in inclement weather.

BRAKES BECOMES HARD WHEN BACKING UP AT VERY LOW SPEED AND SOMETIMES IT FEEL LIKE THE ANTI LOCK BRAKE IS ACTIVATED. USUALLY HAPPEN WHEN BACKING UP

Whenever I connect a trailer to my vehicle I will lose all brake pressure when in reverse. It only happens when in reverse and connected to a trailer. I will have to pump my brakes to the floor and there's no braking power. This does not happen when I do not have a trailer connected.

I was towing a camper down Rt 422 in Butler, PA in my GMC truck when it suddenly caught fire. My wife was following me and alerted me to pull over as quickly as possible. I had no brakes and the gear shifter went straight up without shifting. The doors would also not open while the truck was filling with smoke. I got out using the manual unlock knob and am lucky to be alive. We had about one minute to try to extinguish the flames before it fully engulfed both my truck and camper. I filed a complaint with GMC. By what I am reading online there are many instances of fires and GMC does not seem to provide assistance. This is very unnerving and scary to say the least. I am sad and angry for this situation. This happened through no fault of my own and I lost absolutely everything. I was in the middle of moving to start a new job and lost many work items in my truck as well. I had to delay my start date for work. Now I am responsible for deductables, insurance increases and other items not covered by my insurance. Now I have to buy a new vehicle and camper but what will GMC do to help me? Probably nothing.

WHILE GOING SLOWLY AND TURNING, MY BRAKES FAILED TO STOP ME. THERE WAS NO PRESSURE FOR THE BRAKES. THIS HAPPENED SEVERAL TIMES. I ALMOST RAN INTO THE BACK OF A CAR.

Mileage: 69,000

WAITING IN LINE A COSTCO GAS STATION HAD MY FOOT ON THE BRAKE PEDAL ALL OF A SUDDEN THE BRAKE PEDAL GOT HARD AND THE TRUCK WILL NOT STOP ALMOST HIT THE VEHICLE IN FRONT OF ME

Mileage: 53,000

AT LOW SPEEDS AFTER PUMPING BRAKES I HAVE NO BRAKE PRESSURE AND CANNOT STOP. PEDAL BOTTOMS OUT. ONCE I START MOVING AGAIN BRAKES COME BACK AGAIN.

Mileage: 75,000

MY BRAKE ASSIST SERVICE LIGHT CAME ON IN MY TRUCK AND THE BRAKES ARE ACTING WEIRD AT LOW SPEEDS. I KNOW THERE IS ALREADY A RECALL FOR THIS IN 2015 GMC SIERRA'S BUT APPARENTLY MINE ISN'T INCLUDED. THIS IS APPARENTLY A PROBLEM FOR ALL 2015 GMC'S SO HOW DO I GET MINE INCLUDED. I ALREADY CONTACTED MY LOCAL GM DEALER AND THEY WON'T DO ANYTHING ABOUT IT UNLESS I PAY FOR IT. IT'S OBVIOUSLY A KNOWN PROBLEM AND A BIGGER PROBLEM THAN THEY ARE ADMITTING. HELP ME GET ALL 2015 GMC ON THE RECALL LIST BEFORE SOMEONE ELSE GETS HURT OR KILLED

Mileage: 46,000

VACUUM ISSUE WITH BRAKES. BACKING UP VEHICLE WITH UTILITY TRAILER WHEN BRAKE PEDAL IS PRESSED THEIR IS HESITATION AND LACK OF EASE WHEN PRESSING PEDAL. THEN IF PRESS PEDAL AFTER THAT THERE IS NO MOVEMENT AND PEDAL IS LIKE PUSHING ROCK WITH FOOT, NO SOFTNESS, NO MOVEMENT ALL. HAVE NOTICED THIS OCCASIONALLY FOR THE PAST 8 OR 10 MONTHS BEFORE FINDING THIS PLACE HERE TO NOTE MY ISSUE

Mileage: 36,000

AT LOW SPEEDS THE BRAKE PEDAL IS NON-RESPONSIVE AND PULSES WHILE MAKING A NOISE. IT HAS HAPPEN TWICE, ONCE IN A DRIVE THRU AND ANOTHER TIME BACKING OUT OF A PARKING SPOT. APPEARS TO BE A VACUUM ASSIST ISSUE. ONCE THE TRUCK WAS PLACE IN NEUTRAL AND THE RPM'S WERE INCREASED THE ISSUE WENT AWAY

Mileage: 73,500

SUPPOSEDLY THE BRAKES HAVE BEEN FIXED FOR THE RECALL, HOWEVER, IF I AM DRIVING AS LOW SPEEDS LIKE IN A PARKING LOT, THE ABS WILL KICK IN CAUSING ME TO NOT COME TO A STOP WHEN NEEDED. I HAVE ALMOST HIT SEVERAL VEHICLES DUE TO THIS ISSUE. I HAVE ISSUES WITH THE RADIO WORKING, SPECIFICALLY BEING ABLE TO ADJUST THE SOUND LEVEL. I HAVE ISSUES WITH THE MIRRORS BEING ABLE TO MOVE LIKE THEY SHOULD. BOTH OF THE ELECTRICAL ISSUES ARE PERMANENT, IT DOES NOT MATTER IF I AM PARKED OR DRIVING, THEY DO NOT WORK AT ALL. THIS IS BY FAR THE WORST VEHICLE I HAVE EVER PURCHASED. THE BRAKES HAVE BEEN OCCURRING FOR YEARS AND THERE WAS NO CHANGE WHEN IT WAS BROUGHT IN FOR THE RECALL. THE MOST RECENT ISSUE IS NOW MY EVAP SYSTEM NEEDS TO BE FIXED. I CAN ONLY IMAGINE WHAT THAT WILL COST TO FIX ON A VEHICLE THAT ONLY HAS 100,000 MILES ON IT. CAN'T WAIT TO GET THAT BILL!

BACKING OUT OF MY DRIVEWAY IN REVERSE APPLIED THE BRAKES AND BRAKE WENT ALL THE WAY TO THE FLOOR AND DID NOT STOP THE VEHICLE LIKE IT SHOULD. THIS VEHICLE HAD A RECALL ALREADY ON IT FOR THE VACUUM PUMP FAILING CAUSING A LOSS OF BRAKING POWER. I GOT THE RECALL REMEDIED ( SUPPOSEDLY BY INCREASING THE VACUUM PRESSURE BUT NOW 6 TO 7 MONTHS LATER THIS IS A HUGE ISSUE IT IS EXTREMELY DANGEROUS DRIVING IN LOW SPEEDS DOWN RESIDENTIAL AREAS WITH KIDS PLAYING ETC AND YOUR BRAKES FAIL YOU THIS ULTIMATELY CAN CAUSE VERY SERIOUS INJURY IF NOT DEATH. AND TO KNOW THEY PUT A RECALL OUT THAT SUPPOSEDLY FIXES THE ISSUE AND IT DOSENT FIX ANYTHING MAKES IT WORSE BECAUSE YOUR CHEAP AND DONT WANT TO REPLACE A VACUUM PUMP IS UTTERLY DISTURBING AND DISGUSTING

Mileage: 98,000

MY TRUCK STILL HAS THE HARD BRAKING ISSUE EVEN THOUGH THE RECALL HAS BEEN PERFORMED. I RECEIVED A SECOND LETTER AND TOOK IT BACK INTO THE DEALER AND THEY SAID THE REPROGRAM HAD ALREADY BEEN PERFORMED AND THAT WAS ALL THEY COULD DO. I HAD IT AT THE MECHANIC FOR SERVICE AND WAS TOLD I WAS GOING TO NEED A NEW BRAKE VACUUM. HE EXPERIENCED THE SAME HARD BREAKING ISSUE WHEN HE WAS TEST DRIVING IT. I TRAVEL AND DRIVE MY TRUCK A LOT AND MAKES ME VERY NERVOUS THIS IS GOING TO CAUSE AN ACCIDENT.

LOW SPEED BRAKE FAILURE. CREEPING UP TO A STOP SIGN AND AND NOT BEING ABLE TO STOP DUE TO BRAKES BEING HARD TO PUSH. THERE WAS A RECALL FOR THIS EXACT PROBLEM BUT WHEN THE DEALER TYPED IN MY VIN # THE DECAL WASN'T LISTED.

Mileage: 55,000

DURING REAL SLOW SPEED MY BRAKES WILL GET EXTREMELY HARD TO PRESS. DURING THIS TIME THE TRUCK WILL BECOME HARD TO STOP. THIS USUALLY HAPPENS WHEN PARKING OR IN A DRIVE- THRU.

Mileage: 125,000

IN SLOW TRAFFIC TODAY I ALMOST SLAMMED INTO THE BACK OF A CAR! THE BRAKE PEDAL WENT TO THE FLOOR,AND HAD A SHUTTER FEELIN TERRIBLE!! THIS IS SCARY AND NEEDS RECALLED NOW!! I HEARD IT WAS BUT CAME UP NO WITH MY VIN#?? BUT MY YEAR IS SUPPOSED TO BE RECALLED...THIS NEEDS FIXED IM NOT HAPPY AFTER TODAY..

Mileage: 91,000

2015 GMC SIERRA 1500. HAD THE BRAKE PUMP VACUUM RECALL PERFORMED NOT TOO LONG AGO. THIS ISSUE ACTUALLY SEEMS WORSE NOW. I WAS BACKING OUT OF A PARKING SPOT - LOW SPEED WAS THE ISSUE PREVIOUSLY- AND APPLIED THE BRAKE. NOTHING HAPPENED, NO BRAKES (PEDAL WAS DEPRESSED) TRUCK CONTINUED TO BACK OUT AND I HAD TO JAM ON THE BRAKE AGAIN, ONLY THEN DID THE TRUCK BRAKE SYSTEM SHUDDER AND ENGAGE ENOUGH FOR ME TO STOP. THIS HAPPENS AT LOW LOW SPEEDS - CRAWLING TRAFFIC, PARKING LOTS ETC.... I GOT TO TAP THE BRAKE PEDAL TO SLOW A BIT AND NOTHING OCCURS - OR THE PEDAL PUSHES BACK AT ME GIVING ME NO BRAKES. I HAVE TO COMPLETELY DISENGAGE THE PEDAL AND THEN FORCEFULLY ENGAGE THE PEDAL AGAIN TO GET ANY KIND OF BRAKING. I HAVE ONLY NOTICED THIS AT VERY SLOW SPEEDS. THIS IS TERRIBLY SCARY WHEN WE ARE CRAWLING DOWN A STEEP MOUNTAIN HIGHWAY WITH BUMPER TO BUMPER TRAFFIC AND I GET NO BRAKE RESPONSE. LIKE I SAID, THE TRUCK WENT IN FOR A RECALL THAT WAS SUPPOSED TO HAVE FIXED THIS ISSUE.

Mileage: 65,000

TRUCK CONTINUES TO LOSE BRAKES AT LOW SPEEDS OR WHEN BACKING/PULLING TRAILER. TRUCK WAS SERVICED FOR BRAKE RECALL AND NO CHANGE TO BRAKING. CONSISTENTLY LOOSES BRAKING WHEN PARALLEL PARKING OR BACKING INTO PARKING SPOTS ALONG WITH STOP AND GO TRAFFIC BRAKES GO OUT AND YOU MUST STAND ON THE PEDAL TO STOP THE TRUCK. THIS BRAKING ISSUE HAPPENS ALMOST DAILY.

Mileage: 50,000

THE BRAKES FAILED AS MY SON APPROACHED AN INTERSECTION. SUBSEQUENTLY, HE STRUCK ANOTHER VEHICLE BROADSIDE. EXTENSIVE DAMAGE WAS SUSTAINED TO BOTH VEHICLES. THE DRIVER REPORTED THAT HE PRESSED THE BRAKE PEDAL, BUT THE TRUCK WOULD NOT STOP. AFTER I INVESTIGATED FURTHER FOR AN EXPLANANTION,I DISCOVERED THAT THERE WAS A RECALL ON HIS BRAKE SYSTEM THAT MIGHT EXPLAIN BRAKE FAILURE. THE CRASH OCCURRED ON A CITY STREET.

Mileage: 150,000

THE VEHICLE IS STALLING WHEN BRAKING AND GETTING READY TO TURN. MY TRUCK IS SHOWING STABILITRAK SERVICE INTERMITTENTLY AND I'VE ALMOST BEEN IN A CRASH 3 TIMES BECAUSE OF THIS. THE VEHICLE ONLY RESTARTS AFTER PLACING IN PARK. THIS IS NOT SAFE WHEN IN TRAFFIC. THERE SEEMS TO BE NO RECALLS AND NO KNOWN CAUSE. SOMEONE IS GOING TO DIE IF GM DOESN'T FIX THIS. I'VE BEEN ON FORUMS AND IT'S A COMMON PROBLEM. IT SHOULD BE FIXED BY GM IF IT IS SO COMMON. THIS HAPPENS WHEN APPROACHING CROSS TRAFFIC AT AN INTERSECTION AND I LOSE ALL CONTROL OF STEERING BRAKING AND POWER TO THE TRUCK.

Mileage: 60,000

HAVING DIFFICULTY BREAKING DURING ON AND OFF PARKING MODE IN A STATIONARY POSITION. WHEN I REVERSE OR MOVE FORWARD AFTER CHANGING TO EITHER REVERS OR DRIVE GEAR MY TRUCK SEEMS TO TAKE LONGER TO BREAK, AND ALMOST FEEL THAT I DON'T HAVE CONTROL OF THE VEHICLE. ITS KINDA SCARY TO BE HONEST NOT HAVING CONTROL OF THE BREAKS. THE BREAKS DO BETTER WHEN I'M DRIVING LIKE IN THE EXPRESSWAY WITH OUT ANY PROBLEMS. HOWEVER, WHEN I PARK IN THE HOUSE OR IN A GENERAL PARKING LOT MY TRUCK ANTILOCK SYSTEM DOESN'T SEEM TO WORK VERY WELL. I HAVE ALREADY TAKEN MY TRUCK FOR A RECALL SERVICE AT A GMC DEALER KNOWN AS LUKE FRUIA IN BROWNSVILLE TEXAS 78521 BUT DON'T SEE ANY DIFFERENCE. FEELS LIKE THEY JUST DIDN'T FIX THE PROBLEM. I ALREADY TOOK THE TRUCK TO A CERTIFIED MECHANIC AND SAID THAT THE BREAK FINE SO I THINK ITS THE ANTILOCK SYSTEM NOT WORKING. IM SCARED DRIVING THE TRUCK AND FEAR I MIGHT GET INTO A COLLISION OR CRASH DUE TO MY ANTILOCK BREAKS NOT WORKING APPROPRIATELY. TO BE HONEST, I FEEL VERY UNSAFE DRIVING THIS VEHICLE SO I HAVE BEEN USING MY TOYOTA CAR. PLEASE, NEED YOUR HELP ON THIS MATTER. THANK YOU

BRAKING ISSUE. WHILE TRAVELING IN A DRIVE THRU, VEHICLE BRAKE PEDAL WENT TO THE FLOOR, PULSATED SOME, AND REQUIRED EXTREME EFFORT TO STOP. THIS OCCURRED DURING SUBSEQUENT BRAKING INCIDENTS WHILE MOVING AND STOPPING IN THE DRIVE-THRU. AFTER LEAVING, BRAKE PEDAL FELT OK. GOOGLED SYMPTOMS WHICH MATCHED MY CIRCUMSTANCES AND LISTED A RECALL. HOWEVER, THERE IS NO RECALL LISTED ON NHTSA. SEEMS A LITTLE TROUBLING AS THIS APPEARS TO AFFECT 3.4 MILLION GM VEHICLES. *TR

Mileage: 60,000

VIRTUALLY UNABLE TO DEPRESS BRAKE PEDAL AT LOWER SPEEDS - TOTAL BRAKE FAILURE. "NO RECALLS AVAILABLE" ACCORDING TO THE DEALER DATABASE, BUT THIS IS ABSOLUTELY THE SAME BRAKE RECALL ISSUE THEY REFUSED TO ADDRESS FOR A FEW YEARS UNTIL 2 PEOPLE DIED.

Mileage: 74,000

WHILE PARKING IN REVERSE AT LOW SPEEDS, THE BRAKES BECAME REALLY STIFF AND WAS BARELY ABLE TO STOP.

Mileage: 83,300

DURING PARKING (LOW SPEEDS) MY BRAKE PEDAL BEGAN MAKING NOISE. WHEN STOPPING IN THE PARKING SPOT, THE BRAKE PEDAL WAS VERY STIFF AND COULD ONLY PRESS IT DOWN 1/2"-1", BARELY ABLE TO STOP.

Mileage: 83,000

BRAKE PEDAL GETS HARD TO PUSH OR TRYING TO STOP.

THE BRAKES AT SLOW RATE OF SPEED BECOME VERY HARD TO OPERATE AND PUSH. MADE APPOINTMENT WITH GMC DEALER FOR SERVICE (SCHED FOR 1/31).

Mileage: 34,528

WHEN EXITING FROM ONE HIGHWAY TO ANOTHER IN HEAVY TRAFFIC WERE BREAKING WAS REQUIRED, MY TRUCKS POWER STEERING AND POWER BRAKES HAD COMPLETELY GONE OUT. I WAS ON A STRAIGHT TRACK FOR A HIGHWAY PATROL WHO WAS STANDING OUTSIDE HIS VEHICLE ALONG WITH ANOTHER MOTORIST. AFTER FIGHTING TO STEER THE TRUCK WHILE TRYING TO BRAKE TO AVOID HITTING OTHER MOTORISTS I REALIZED THAT THE TRUCK HAD ALSO DIED. SHOOK UP AND SCARED I STARTED THE TRUCK AND BEGAN TO DRIVE AWAY WITH THE OFFICER YELLING WHAT THE HELL ARE YOU DOING. THE TRUCK HAS DONE THIS SEVERAL TIMES. THREE OF WHICH ALMOST RESULTED IN AN ACCIDENT. IT HAS BEEN IN THE DEALERSHIP WERE THEY TOLD ME IT WAS A HIGH RESISTANCE IN THE NEGATIVE BATTERY CABLE WHICH WAS REPLACED AND RESULTED IN NO CHANGE.

Mileage: 66,000

WHILE PULLING INTO A PARKING LOT ANT A FRIEND APARTMENT I WAS TURNING INTO A PARKING SPOT WHEN THE TRUCK COMPLETELY DIED CAUSING NO POWER STEERING OR BRAKED NEARLY CAUSING ME TO HIT HIS NEIGHBORS CAR.

Mileage: 68,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT RECEIVED A RECALL NOTICE FOR NHTSA CAMPAIGN NUMBER: 19V761000 (ELECTRONIC STABILITY CONTROL, SERVICE BRAKES, HYDRAULIC, SERVICE BRAKES). THE CONTACT TOOK THE VEHICLE TO FINNEGAN CHEVROLET BUICK GMC (26529 SOUTHWEST FWY, ROSENBERG, TX 77471, (281) 342-4200) TO BE SERVICED FOR THE SOFTWARE UPDATE. AFTER THE CONTACT HAD THE VEHICLE REPAIRED PER THE RECALL, WHILE DRIVING AT A LOW RATE OF SPEED, THE BRAKES FAILED TO OPERATE WITHOUT WARNING. THE VEHICLE WAS TOWED BACK TO THE DEALER WHERE IT WAS DIAGNOSED WITH A FAULTY BRAKE VACUUM PUMP. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND DID NOT ASSIST BECAUSE THE VEHICLE WAS PREVIOUSLY REPAIRED PER THE RECALL. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 65,000.

Mileage: 65,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 35 MPH, THE PRECEDING VEHICLE STOPPED ABRUPTLY. WHEN THE BRAKE PEDAL WAS DEPRESSED, IT TRAVELED TO THE FLOORBOARD. THE CONTACT STARTED TO PUMP THE BRAKE PEDAL; HOWEVER, THE VEHICLE CRASHED INTO THE REAR OF THE STOPPED VEHICLE. THERE WERE NO INJURIES, BUT THE CONTACT STATED THAT HE FELT A BIT SORE. A POLICE REPORT WAS FILED. THE AIR BAGS OPERATED AS INTENDED. THE VEHICLE WAS TOWED TO QUEBEDEAUX BUICK GMC (LOCATED AT 3566 E. SPEEDWAY BOULEVARD, TUCSON, AZ, 85716) TO BE DIAGNOSED AND REPAIRED. THE CONTACT WAS INFORMED THAT THERE WAS A FAILURE WITH THE BRAKES, BUT WAS NOT GIVEN A DEFINITIVE DIAGNOSIS. THE CONTACT STATED THAT THE ESTIMATE FOR THE REPAIR WAS $22,000. THE REPAIR WAS STILL PENDING. THE VEHICLE WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 19V645000 (SERVICE BRAKES, HYDRAULIC). THE MANUFACTURER WAS NOT INFORMED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 78,000.

Mileage: 78,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT RECEIVED A RECALL NOTICE FOR NHTSA CAMPAIGN NUMBER: 19V645000 (SERVICE BRAKES, HYDRAULIC). THE VEHICLE WAS TAKEN TO NELSON HALL CHEVROLET (1811 S FRONTAGE RD, MERIDIAN, MS 39301, (601) 621-4593) WHERE IT WAS REPAIRED. AFTERWARDS, THE BRAKE PEDAL BECAME DIFFICULT TO DEPRESS. THE CONTACT STATED THAT THE FAILURE RECURRED THREE TIMES. THE VEHICLE WAS NOT TAKEN BACK TO THE DEALER FOR REPAIRS. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 105,000.

Mileage: 105,000

WHEN BRAKING THE PEDAL GETS REALLY HARD. WHEN BACKING MY SMALL BOAT IN THE LAKE I HAVE HAD TO STAND ON THE BRAKES TO GET IT TO STOP. HOPING TRUCK AND BOAT ALONG WITH MYSELF WOULD NOT GO DOWN. VERY SCARY. WHEN THE FIRST INITIAL PUSH IT SEEMS FINE BUT THEN THEY GO. FORWARDS YOU CAN TELL THEY ARE NOT RIGHT AND YOU HAD BETTER STAY YOUR DISTANCE FROM ANYTHING IN FRONT OF YOU. AFTER READING ALL THE OTHER COMPLAINTS THIS IS CRAZY THERE HAS NOT BEEN A RECALL DON'T THINK A SMALLER MAN OR WOMAN COULD HAVE PREVENTED THE HOLE THING FROM GOING IN THE WATER. LOVE THE TRUCK WE ALL HAVE PROBLEMS. CONFRONT THEM AND GET IT RIGHT. STILL LOVE GMC. MAYBE NOT GMC BOARD THOUGH. MAN UP BEFORE SOMEONE LOOSES A LOVED ONE.

Mileage: 265,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT RECEIVED A RECALL NOTICE FOR NHTSA CAMPAIGN NUMBER: 19V645000 (SERVICE BRAKES, HYDRAULIC). THE CONTACT STATED THAT THE BRAKE PEDAL WAS DEPRESSED TO THE FLOORBOARD; HOWEVER, THE VEHICLE FAILED TO IMMEDIATELY COME TO A COMPLETE STOP. WHILE THE BRAKE PEDAL WAS DEPRESSED, THE VEHICLE UNINTENTIONALLY ACCELERATED. THE CONTACT MENTIONED THAT THE VEHICLE WAS PLACED INTO NEUTRAL TO KEEP THE FAILURE FROM OCCURRING. THE VEHICLE WAS TAKEN TO MCKINNEY BUICK GMC (3950 S CENTRAL EXPY, MCKINNEY, TX 75069, (469) 804-2338) WHERE THE VACUUM PUMP WAS REPLACED, BUT THE FAILURE RECURRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 110,000.

Mileage: 110,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT STATED THAT THE VEHICLE EXHIBITED REDUCED BRAKING POWER WHEN DRIVING AT LOW SPEEDS. THE VEHICLE WAS TAKEN TO MIKE RAISOR BUICK GMC (2912 MAIN STREET, LAFAYETTE, INDIANA 47904, (765) 273-4954) FOR NHTSA CAMPAIGN NUMBER: 19V645000 (SERVICE BRAKES) IN AUGUST OF 2019. WITHIN A COUPLE OF WEEKS, THE BRAKE SYSTEM FAILURE WORSENED AFTER THE REPAIR. THE CONTACT ALSO EXPERIENCED REDUCED BRAKING POWER WHEN DRIVING AT HIGH SPEEDS. IN ADDITION, THE BRAKE ASSIST FEATURE FAILED BEFORE THE VEHICLE WAS STOPPED. THE CONTACT STATED THAT THE STOPPING DISTANCE WAS SIGNIFICANTLY LONGER. THE MANUFACTURER WAS CONTACTED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS 32,000.

Mileage: 32,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE OPERATING THE VEHICLE AT NIGHT, BOTH THE LOW BEAM AND HIGH BEAM HEADLIGHTS ILLUMINATED EXTREMELY LOW, WHICH CREATED A VISIBILITY HAZARD FOR THE DRIVER. ALSO, WHILE DRIVING IN FORWARD AND REVERSE, THE BRAKE PEDAL BECAME EXTREMELY HARD TO DEPRESS AND THE STOPPING DISTANCE WAS EXTENDED. THE CONTACT INDICATED THAT THE FAILURES WERE MORE PRESENT WHILE DRIVING AT LOW SPEEDS IN REVERSE AND AFTER PRESSING THE BRAKE PEDAL MULTIPLE TIMES. THE CAUSE OF THE FAILURES WAS NOT DETERMINED. CHARLIE'S CHEVROLET (1412 US ROUTE 202, WINTHROP, ME 04364) AND THE MANUFACTURER WERE NOTIFIED. THE FAILURE MILEAGE WAS 14,000.

Mileage: 14,000

2015 GMC SIERRA DENALI. CONSUMER WRITES IN REGARDS TO BRAKE PEDAL PIVOT BOLT SENSOR FAILURE. *LD *JS

BRAKES WOULDN'T STOP

Mileage: 49,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING AT LOW SPEEDS, THE BRAKE PEDAL WAS DEPRESSED, BUT THE VEHICLE FAILED TO STOP. THE CONTACT STATED THAT EXTRA FORCE WAS NEEDED TO DEPRESS THE BRAKE PEDAL AND STOP THE VEHICLE. THE VEHICLE WAS TAKEN TO TUSTIN BUICK GMC (1 AUTO CENTER DR, TUSTIN, CA, (714) 460-9877) WHERE IT WAS REPAIRED PER NHTSA CAMPAIGN NUMBER: 19V645000 (SERVICE BRAKES, HYDRAULIC); HOWEVER, THE REMEDY FAILED TO REPAIR THE VEHICLE. THE CONTACT MENTIONED THAT THE FAILURE STILL OCCURRED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 107,000.

Mileage: 107,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE BRAKING OR MAKING A RIGHT TURN WHILE BRAKING, THE VEHICLE LOST POWER. THE FAILURE OCCURRED THREE TIMES IN TRAFFIC WITHOUT WARNING. IN ADDITION, THE STABILITRAK WARNING INDICATOR ILLUMINATED. THE VEHICLE COULD NOT BE DRIVEN. PALM DALE CHEVROLET (1160 MOTOR LN, LANCASTER, CA 93534, (877) 385-0885) WAS CONTACTED, BUT THEY DID NOT ASSIST. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND DID NOT ASSIST. THE FAILURE MILEAGE WAS 58,000. THE VIN WAS UNKNOWN.

Mileage: 58,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA. WHILE DRIVING LOW SPEEDS, THE VEHICLE VIOLENTLY VIBRATED AND MADE AN ABNORMAL NOISE. ALSO, THE STABILITRAK AND CHECK ENGINE INDICATORS ILLUMINATED. THE CONTACT MENTIONED THAT THE CHECK ENGINE INDICATOR PERIODICALLY ILLUMINATED AND FLASHED. ALSO, WHILE DRIVING, EXTRA FORCE WAS NEEDED TO DEPRESS THE BRAKE PEDAL AND STOP THE VEHICLE. THE VEHICLE WAS TAKEN TO BOULEVARD BUICK GMC (2800 CHERRY AVE, SIGNAL HILL, CA 90755, (562) 492-1000) WHERE THE CONTACT WAS INFORMED THAT THE VEHICLE MISFIRED AND THE ENTIRE ENGINE NEEDED TO BE DIAGNOSED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 59,000.

Mileage: 59,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING 30 MPH, THE CONTACT ATTEMPTED TO DEPRESS THE BRAKE PEDAL; HOWEVER, THE PEDAL WAS EXTREMELY STIFF AND HARD. THE CONTACT STATED THAT THE SERVICE BRAKE ASSIST WARNING INDICATOR ILLUMINATED. THE CONTACT WAS ABLE TO CONTINUE TO DRIVE, BUT HAD TO USE TWO FEET TO STOP THE VEHICLE. THE CONTACT DROVE THE VEHICLE TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE BRAKE VACUUM PUMP FAILED AND NEEDED TO BE REPLACED. THE MECHANIC STATED THAT THE VEHICLE NEEDED TO BE TOWED TO A DEALER. THE VEHICLE WAS TOWED TO JERRY SMITH CHEVROLET (12484 RESERVATION RD, ANACORTES, WA 98221, 360-610-4128), BUT WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS APPROXIMATELY 57,000.

Mileage: 57,000

GMC TRUCK BRAKE PEDAL WILL BECOME VERY STIFF AND DIFFICULT TO DEPRESS AT LOW SPEEDS AFTER BRAKES ARE HOT (DRIVING THROUGH MOUNTAINS). THIS APPEARS TO BE CONSISTENT WITH THE GM BRAKE BOOSTER ISSUES THAT APPEAR ONLINE.

Mileage: 54,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE AN INDEPENDENT MECHANIC WAS INSPECTING THE VEHICLE, THE CONTACT WAS INFORMED OF A RADIATOR LEAK. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE WAS TAKEN TO GOODWIN CHEVROLET BRUNSWICK (LOCATED AT 195 PLEASANT ST, BRUNSWICK, ME 04011, (866) 675-8244) WHERE IT WAS DIAGNOSED THAT THE RADIATOR AND AIR CONDITIONER CONDENSER NEEDED TO BE REPLACED. THE CONTACT ALSO STATED THAT THE BRAKE PEDAL WAS DIFFICULT TO DEPRESS AND THE WINDSHIELD WIPERS FAILED TO FUNCTION. THE BRAKE AND WINDSHIELD WIPER FAILURES WERE NOT DIAGNOSED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED. THE FAILURE MILEAGE WAS 107,000.

Mileage: 107,000

LOW SPEED BREAKING PEDAL HARD VEHICLE WILL NOT STOP CAN HEAR CLICKING NOISE CONDITION WORST WHILE IN REVERSE ALMOST CAUSED 3 ACCIDENTS CONTACTED DEALER THEY SAY THEY KNOW OF THE PROBLEM AND COST TO FIX IS AROUND $1000 IF THIS IS SUCH A COMMON ISSUE LIKE MY DEALER SAID WHY DO I NEED TO PAY TO HAVE IT FIXED IT'S A SAFETY ISSUE THAT GM KNOWS ABOUT. THIS ISSUE HAS BEEN ON GOING FOR OVER A YEAR WITH MY TRUCK.

Mileage: 90,000

THE BRAKE TURN HARD WHEN I AM GOING IN REVERSE IN A SLOW SPEED.

Mileage: 10

WHILE BACKING UP. BRAKE PEDAL WENT ALL THE WAY TO THE FLOOR AND WAS UNABLE TO STOP. MANAGED TO GET IT TO STOP. I HAVE HEARD ABOUT A BRAKE BOOSTER ISSUES.

Mileage: 39,000

BRAKE PEDAL STIFF/HARD WHEN APPLYING BREAKS. PROBLEM OCCURS PERIODICALLY WITHIN THE CITY AND HIGHWAY.

BRAKES DO NOT WORK WHEN IN REVERSE OR AT LOW SPEEDS. PROBLEM WAS THERE THE DAY I PURCHASED THE VEHICLE. A COUPLE WEEKS AFTER PURCHASE I BACKED INTO VEHICLE IN A PARKING LOT. I WAS TOLD IT WAS "NORMAL" AFTER ALMOST HAVING A WRECK I DID SOME RESEARCH. HOW IS THIS NOT NATIONALLY ADVERTISED AS A RECALL YET? THIS IS A HUGE SAFETY NEGLIGENCE ON GMC'S PART. THE VACUUM PUMP IS KNOWN TO FAIL BY EVERY DEALER I HAVE CALLED. ALSO EVERYONE I KNOW WHO HAS THE SAME MODEL TRUCK ALSO LIVES WITH THIS PROBLEM.

Mileage: 15,000

WHEN THE TRUCK'S VACUUM PUMP FAILS, THE BRAKE PEDAL BECOMES VERY HARD TO PUSH. THE TRUCK DOES NOT STOP AT LOW SPEED WHEN THIS HAPPENS. THE FIRST TIME THIS HAPPENED, I WAS BACKING INTO A PARKING SPACE AT CHRISTMAS TREE STAND. I NEARLY BACKED INTO THE TENT AND PERSONS LOADING THE CHRISTMAS TREE IN THE TRUCK. THE SECOND TIME THIS HAPPENED, I WAS PARKING MY TRUCK IN DRIVEWAY. I ROLLED ABOUT 6' TO 8' BEFORE STOPPING. I NEARLY HIT MY HOUSE. GM ISSUES A "SPECIAL WARRANTY" BUT THEY REFUSE TO COVER THE REPAIRS BECAUSE OF THE VEHICLE MILEAGE. THIS SAME ISSUE IS WELL DOCUMENTED BY OTHER GM TRUCK OWNERS FOR 2014 TO 2018 MODEL YEARS.

Mileage: 65,000

I ONLY HAVE 57,000 MILES ON MY TRUCK, WHICH IS WHY I AM REPORTING THIS. THE TRUCK TURNS OFF COMPLETELY. I HAVE BEEN GOING TO MAKE A RIGHT/LEFT TURN AND THE TRUCK SHUTS DOWN COMPLETELY. I HAVE NO POWER STEERING AND LIMITED BRAKES. THIS HAS HAPPENED TO ME TWICE NOW. I AM LUCKY ENOUGH THAT I AM STRONG ENOUGH TO TURN THE TRUCK WITHOUT POWER STEERING OTHERWISE I WOULD HAVE HIT VEHICLES BOTH TIMES THIS HAPPENED. THERE HAS TO BE SOME TYPE OF ELECTRICAL FLAW THAT IS MAKING THIS HAPPEN. I WANT TO GET THIS RESOLVED BEFORE MY INSURANCE COMPANY HAS TO GET INVOLVED BECAUSE I AM IN A CAR ACCIDENT. IF THIS IS SOMETHING THE MANUFACTURER TAKES CARE OF THAT WOULD BE GREAT, OTHERWISE I WOULD JUST LIKE TO KNOW IF SOMEONE ELSE HAS HAD THIS ISSUE AND HAS FOUND THE RESOLUTION.

Mileage: 57,000

WHEN COMING TO A STOP THE BRAKE PEDAL GETS HARD TO DEPRESS AND THE RATE OF DECELERATION CHAGES MAKES IT HARD TO JUSGE WHEN AND WHERE THE VEHICLE WILL END UP.

Mileage: 69,100

WHILE IN A DRIVE THROUGH I WAS CREEPING UP AND WHEN TRYING TO COME TO A STOP MY BRAKE PEDAL WOULD NOT DEPRESS ALL THE WAY AS NORMAL AND TOOK A LONGER THAN NORMAL TIME TO STOP EVEN WITH BOTH FEET PUSHING ON THE BRAKE PEDAL. I ENDED UP ROLLING INTO THE CAR IN FRONT OF ME. I TOOK THE CAR TO THE DEALERSHIP THE NEXT DAY AND WAS TOLD THAT MY VACUUM PUMP/BRAKE BOOSTER NEEDED TO BE REPLACED.

Mileage: 88,000

WHEN YOU STEP ON THE BRAKES IN MOTION THE BRAKE PEDAL IS HARD AND VEHICLE TAKES LONGER TO STOP.

Mileage: 68,000

THE BRAKES PERIODICALLY DO NOT WORK AT LOW SPEEDS. THE BRAKE PEDAL GETS HARD TO PUSH TO THE POINT YOU HAVE TO STAND ON THE BRAKES TO GET THE VEHICLE TO STOP. I HAVEN'T GOTTEN IN AN ACCIDENT YET BUT IT'S BEEN VERY CLOSE TWICE NOW WHERE I'VE ALMOST HIT A CAR IN FRONT OF ME AT A STOP SIGN.

Mileage: 102,000

HARD BRAKE PEDAL AT LOW SPEEDS ESPECIALLY WHILE TOWING OR TRAVELING ON INCLINES. BRAKE PEDAL BECOMES HARD TO DECOMPRESS WITHOUT WARNING AND VEHICLE IS UNABLE TO BE STOPPED.

Mileage: 60,000

MY 2015 GMC SIERRA FAILED TO STOP AT LOW SPEEDS TODAY. I AVOIDED THE COLLISION BY PULLING OFF THE SIDE OF THE ROAD. THE PEDDLE WAS EXTREMELY HARD TO PUSH. I RECEIVED A NOTICE BY GMC THAT ITS THE VACCUM PUMP AND THEY WILL ONLY COVER THE WARRANTY UP TO 72K MILES. MY TRUCK HAS 72,560 MILES.

Mileage: 72,500

BRAKE VACUUM PUMP: WHILE ATTEMPTING TO STOP, THE BRAKE PEDAL BECAME VERY FIRM AND THE VEHICLE WAS DIFFICULT TO STOP. THE VEHICLE CONTINUED TO MOVE WHILE DEPRESSING THE BRAKE PEDAL AND REQUIRED A SUBSTANTIAL AMOUNT OF EFFORT TO MAKE THE VEHICLE COME TO A STOP. IT WAS INTERMITTENT, BUT IT DID OCCUR SEVERAL TIMES ON THE DAY I FIRST NOTICED IT AND WAS OFTEN AT LOW SPEED. FORTUNATELY I WAS NOT INVOLVED IN ANY ACCIDENT WHEN THIS FIRST OCCURRED. I WAS ABLE TO DRIVE IT TO THE NEAREST DEALERSHIP IMMEDIATELY AND HAD IT REPAIRED THAT DAY. THE DEALER WAS ABLE TO DUPLICATE THE ISSUE AND DETERMINED THE VACUUM PUMP TO BE DEFECTIVE AND REQUIRED TO BE REPLACED. ONCE REPLACING THE VACUUM PUMP, THE BRAKES PERFORMED AS EXPECTED. ATTACHED IS A COPY OF MY INVOICE WITH THE DEALER NARRATIVE DESCRIBING THE REPAIR.

Mileage: 88,429

LOW SPEED BRAKES HARD AND TAKES TIME TO SLOW AND STOP. BRAKES SEIZED BACKING DOWN DRIVEWAY 2XS. GOT NOTIFICATION FROM GMC THAT THEY ARE AWARE THE VACUUM /POWER MY BE DEFECTIVE AND IF YOU EXPERIENCE THIS PROBLEM THE DEALERSHIP WOULD FIX IT AT NO COST BUT OT HAD TO HAVE LESS THEN 72,00 MILES. DROP IT OFF AT OUR DEALERSHIP AND THEY CLAIM NO PROBLEMS FOUND. THEY HAD FOR 3 DAYS AND JUST DROVE IT AROUND WITH A COMPUTER HOOKED UP TO IT. SAID NO CODES CAME UP SO THEY ARE NOT BOTHERING WITH IT. PICK IT AND STILL THE SAME. HUSBAND WENT BACK. THEY DON'T WANT TO BOTHER CUZ THE MILAGE IS OVER 72,000. WE HAVE 75,000. I AM AFRAID TO DRIVE IT. THEY NEED TO BE RECALLED FOR THE VACUUM /POWER BRAKE ISSUE. OUR TRUCK IS ONLY 4 YRS OLD AND WE PAID BIG MONEY FOR IT. WE LIVE CHEVY/GMC. WE WOULD NEVER OWN ANYTHING ELSE. RECALK IS NEEDED.

Mileage: 75,000

AFTER COMING TO A STOP OR REACHING SLOW SPEED, THE BRAKE PEDAL BECOMES FIRMER WITH EACH PUMP UNTIL THE PEDAL ONLY MOVES ROUGHLY AN INCH BEFORE STOPPING, AND BRAKING FORCE IS BARELY ENOUGH TO KEEP THE TRUCK FROM IDLING FORWARD. WHEN THIS HAPPENS ON A DOWNWARD SLOPE AT A STOPLIGHT IT REQUIRES MASSIVE AMOUNT OF FORCE ON THE BRAKE PEDAL TO KEEP THE TRUCK FROM ROLLING INTO THE CAR IN FRONT OF IT. ALSO, IF TRAFFIC BEGINS TO MOVE AFTER A STOP AND THEN STOPS AGAIN ABRUPTLY WITHOUT GAINING MUCH SPEED,THE SAME THING WILL OCCUR AND IT IS EXTREMELY DIFFICULT TO NOT HIT THE REAR END OF THE CAR IN FRONT. AFTER DOING SOME RESEARCH THIS SEEMS TO BE A COMMON ISSUE WITH THE VACUUM PUMP. I WILL BE VISITING A DEALER SOON. 2015 GMC SIERRA SLT WITH 57,000 MILES.

Mileage: 57,000

I AFTER PULLING INTO A SERVICE STATION, I WAS BACKING UP AND SUDDENLY HAD NO BRAKES. I ALMOST HIT ANOTHER VEHICLE.

Mileage: 38,240

HARD TO NO BRAKING AT LOW SPEED. POWER BRAKE ASSIST FAILURE.

Mileage: 93,000

INCREASED / INCONSISTENT BRAKE PEDAL EFFORT AT LOW SPEEDS; TRUCK TAKES MORE EFFORT TO STOP, INCREASED BREAKING DISTANCE

Mileage: 30,000

BRAKE PEDAL BECOMES HARD AND NON EFECTIVE WHEN ATTEMPTING TO PARK OR AT LOW IDLE SPEEDS ON NUMEROUS OCCASIONS NEARLY CAUSING SERIOUS HARM TO BYSTANDERS AND PROPERTY. THIS IS A MAJOR PROBLEM WITH GM TRUCKS AND DO NOT KNOW WHY A RECALL HAS NOT BEEN ISSUED TO PROTECT THE PUBLIC FROM SERIOUS INJURY.

Mileage: 35,000

BRAKE FAILURE AT PARKING LOT SPEED. WHILE REVERSING IN TRUCK, BRAKES BECAME HARD AND FAILED. ALMOST HIT ANOTHER VEHICLE.

Mileage: 66,000

HARD PEDAL, EXTREMELY POOR BRAKING RESPONSE WHILE SLOWING AND DURING PARKING OF VEHICLE, ESPECIALLY WHEN MULTIPLE PEDAL PUMPS ARE REQUIRED. PROGRESSIVELY WORSENING OVER PAST 6 MONTHS. I REPLACED VACUUM BOOST PUMP AND PROBLEM WAS CORRECTED.

Mileage: 53,000

AT LOW IDLE THE BRAKING BECOME VERY STIFF AND EXTREME PRESSURE ON THE BRAKE PEDDLE IS NEED TO STOP THE VEHICLE. HANK GRAFF OF DURAND MI INDICATED IT IS DUE TO A FAILED BRAKE ASSIST VACUUM PUMP. THE SERVICE REP. ALSO EXPERIENCED THE ISSUE WHEN THEY PULLED THE VEHICLE INTO THE REPAIR BAY. AS THE OWNER, I HAVE EXPERIENCED THIS BRAKING ISSUE MULTIPLE TIMES.

Mileage: 82,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING 50 MPH, THE BRAKES FAILED TO RESPOND AND THE CONTACT LOST CONTROL OF THE VEHICLE. THE CONTACT DROVE ON THE SHOULDER AND WAS ABLE TO PARK IN A REST AREA TO INSPECT THE VEHICLE. THE CONTACT DROVE THE VEHICLE BACK HOME. THE VEHICLE WAS TAKEN TO MCGOVERN BUICK GMC (LOCATED AT 2806, 150 TURNPIKE RD, WESTBOROUGH, MA 01581, (508) 439-4362) WHERE IT WAS DIAGNOSED THAT THE VACUUM BRAKE PUMP NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 102,000. THE VIN WAS UNKNOWN.

Mileage: 102,000

AT FIRST THE ISSUE STARTED AS I WAS PARKING IN REVERSE, PRESSED THE BRAKES AND THE TRUCK DID NOT WANT TO STOP UNTIL I PUT A LOT OF PRESSURE ON THE BRAKES. THEN PULLED FORWARD TO CHECK AND IT DID THE SAME THING SO I PARKED THE TRUCK AND LEFT IT OVERNIGHT. IT WORKED FINE IN THE MORNING AND THE NEXT FEW DAYS. THEN IT HAPPENED AGAIN AFTER ABOUT A FIVE HOUR DRIVE HOME FROM WORK I EXITED THE FREEWAY EXIT 99 IN TUMWATER THE BRAKES GOT REALLY STIFF AND WAS NOT SLOWING QUICK ENOUGH FOR THE STOP SIGN COMING UP, I SLOWED TO ABOUT 35MPH THEN REALIZED IT WASN'T GONNA STOP SO I PRESSED THE BRAKES AS HARD I COULD SWERVING JUST PAST THE STOP SIGN UNTIL IT STOPPED. PRECEDED SLOWLY GOT SOME FUEL AND STILL HAD ABOUT ANOTHER HOUR DRIVE HOME AND NOW THE BRAKES WAS REALLY STIFF AND TRUCK WOULD NOT STOP UNLESS I PUT A LOT OF PRESSURE ON THE BRAKES. SO I GOT BACK ON THE FREEWAY GOING ONLY ABOUT 55 MPH INCREASING MY STOPPING DISTANCE CRAWLING ALL THE WAY HOME HAVING PRESS THE BRAKES EXTREMELY HARD WHEN I NEEDED TO STOP FOR TRAFFIC LIGHTS. NOW I'M AFRAID TO DRIVE THE TRUCK ANYWHERE WITHOUT FEARING OF THE BRAKES NOT WORKING AT ALL COMPLETELY. IT

Mileage: 56,100

WHILE PULLING INTO A PARKING LOT MY BRAKES FAILED TO STOP MY TRUCK TWICE. THE BRAKE PEDAL WAS VERY STIFF, LIKE IT WAS A MANUAL BRAKE AND NOT POWER. HAD TO DEPRESS BRAKE PEDAL VERY HARD TO GET MY TRUCK TO STOP. I SHUT OFF THE ENGINE AND THEN RESTARTED AND THE BRAKE PEDAL RETURNED TO NORMAL.

Mileage: 41,000

BRAKE BOOSTER VACUUM FAULTY. CAUSING A NEAR MISS IN DRIVE THRU ALMOST REAR ENDING ANOTHER CAR. VACUUM PUMP FAULTY.BRAKES BECOME HARD TO PUSH AND GET NO RESPONSE. THIS IS A VERY DANGEROUS. GM NEEDS TO HAVE A RE-CALL BEFORE PEOPLE GET KILLED. IT IS A KNOWN ISSUE LOTS OF THE SAME COMPLAINTS.

Mileage: 54,000

BRAKE PEDAL WON'T GO DOWN AND IS STIFF . BRAKES DON'T REACT.

Mileage: 113,000

BREAK PEDAL AT LOW SPEEDS LOCKS UP COMPLETELY.

Mileage: 5

BRAKE VACUUM PUMP. AT SLOW SPEEDS MY BRAKES ALMOST DON'T SEEM TO WORK. I'M SURE IT'S THE SAME PROBLEM I'VE READ ABOUT.

Mileage: 49,575

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE BACKING OUT OF A PARKING SPACE, THE CONTACT DEPRESSED THE BRAKE PEDAL, BUT THE VEHICLE DID NOT STOP. AS A RESULT, THE CONTACT STRUCK A PARKED VEHICLE. A POLICE REPORT WAS NOT FILED AND THERE WERE NO INJURIES. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO DETERMINED THAT THE BRAKE VACUUM PUMP WAS DAMAGED AND NEEDED REPLACEMENT. THE DEALER AND MANUFACTURER WERE NOT NOTIFIED OF THE FAILURE. THE VEHICLE WAS REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 48,499.

Mileage: 48,499

BRAKES FAILED. I WAS BACKING INTO MY GARAGE AND THE PEDAL BECAME REALLY HARD TO PUSH. I ALMOST DID NOT GET STOPPED BEFORE I HIT THE WALL.

Mileage: 47,000

YESTERDAY AFTERNOON WHILE BACKING OUT OF PARKING SPOT, MY BRAKES BECAME UNRESPONSIVE. THE PEDAL WAS EXTREMELY HARD TO PRESS AND WOULD NOT STOP THE VEHICLE. THE RESULT WAS THE VEHICLE ROLLING DOWN AN INCLINED PARKING LOT AND HITTING ANOTHER VEHICLE. NORMAL BRAKING HAD RESUMED WHEN LEAVING THE ACCIDENT. THIS IS THE SECOND TIME FOR THE BRAKES TO BECOME UNRESPONSIVE AT LOW SPEEDS. APPROXIMATELY 1 MONTH AGO THE SAME SITUATION HAPPENED DRIVING THROUGH A PARKING LOT. BRAKES BECAME EXTREMELY FIRM AND UNABLE TO STOP THE VEHICLE. NO DAMAGE RESULTED FROM THAT INCIDENT. AFTER READING SEVERAL MESSAGE BOARDS, IT APPEARS TO BE A WIDESPREAD ISSUE WITH THIS VEHICLE THAT RESULTS IN REPLACEMENT OF MULTIPLE POWER BRAKING COMPONENTS. I CURRENTLY FEEL EXTREMELY FORTUNATE THAT MY BRAKES DID NOT FAIL 5 MINUTES EARLIER WHILE PICKING UP MY CHILD FROM SCHOOL.

Mileage: 75,000

BRAKES FAILED TO RESER AT LOW SPEEDS, RESULTING IN NEAR COLLISION. BRAKE PEDAL BECAME STIFF AND UNRESPONSIVE. HAS ALSO HAPPENED PREVIOUSLY, WAS TOLD BRAKE VACUUM PUMP FAILURE IS THE CAUSE. WAS NOTIFIED THIS DOES NOT QUALIFY UNDER VEHICLE WARRANTY DESPITE READING OF MULTIPLE REPORTS OF FAILURE, TECHNICAL BULLETIN RELEASE, AND IMMEDIATE SAFETY ISSUES.

Mileage: 53,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING 1-10 MPH, THE BRAKE PEDAL WAS DIFFICULT TO DEPRESS AND FAILED TO STOP THE VEHICLE. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE LOCAL DEALER AND MANUFACTURER WERE NOT CONTACTED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS 80,000.

Mileage: 80,000

VEHICLE'S BRAKES BECOME STIFF AT LOW RPM CAUSING DIFFICULTIES STOPPING.

Mileage: 50,000

BACKING UP THE TRUCK THE BRAKE PEDAL BECAME HARD AND THE TRUCK WOULD NOT STOP LIKE I LOST POWER I ALMOST HIT MY DOG AND THE GARAGE IT WAS VERY SCARY

Mileage: 55,000

ON SEVERAL OCCASIONS SLOW DRIVING IN PARKING LOTS I HAVE LOST POWER ASSIST BRAKING AND ALMOST HIT A CAR PARKED IN THE SPOT IN FRONT OF ME. I HAVE READ ONLINE ABOUT THE ISSUE WITH THE BRAKE VACUUM PUMP AND AM THINKING THAT IS MY ISSUE. MY BRAKE PEDAL AFTER A FEW PUMPS WILL GET SUPER STIFF. ON EVERY OCCASION THAT THIS HAPPENED IT WAS SLOW MOVING ADJUSTING INTO A PARKING SPOT AND HAD PUMPED THE BRAKES SEVERAL TIMES. THE PEDAL THEN BECOMES STILL AND PUSHING THE BRAKE PEDAL DOES NOT GET THE BRAKING POWER AS EXPECTED.

Mileage: 90,000

WHILE DRIVING AT SLOW SPEEDS IF YOU TAP THE BRAKE PEDAL IT WON'T DEPRESS AND THE TRUCK WILL KEEP ROLLING. THIS HAPPENS WHEN I'M TRYING TO PARK USUALLY. I WAS BACKING IN MY DRIVEWAY AND IT DIDN'T STOP AFTER TAPING THE BRAKE PEDAL 3 TIMES. I HIT THE TELEPHONE POLE WITH REAR BUMPER WHICH BENT THE BODY OF THE LEFT REAR FENDER ENOUGH TO CAUSE THE TAILGATE TO NOT OPEN. MY GMC DEALER REPLACED THE FAULTY BOOSTER PUMP FOR $1029.35 AND I HAD TO RENT A CAR FOR 2 DAYS.

Mileage: 20,000

BRAKE VACUUM PUMP BOOSTER. FIRST STARTED WHEN DRIVING UNDER 5 MPH. THE BRAKES WERE HARD TO PUSH DOWN AND WOULD NOT STOP THE TRUCK PROPERLY. DID THIS FOR APPROXIMATELY 3 MONTHS. THEN DRIVING GETTING OFF THE INTERSTATE AND APPLIED BRAKES GOING 60 MPH THE BRAKES WOULD NOT WORK. COULD BARLEY STOP. SAME ISSUE HAS WHEN DRIVING SLOW. NOW THE BRAKES WILL NOT WORK AT ANY SPEED. THEY TRUCK IS UNDRIVABLE UNTIL IT GETS FIXED.

Mileage: 52,000

VERY DIFFICULT TO STOP THE TRUCK WHILE GOING AT A LOW RATE OF SPEED 5 TO 10 MPH. HAD TO FORCEFULLY APPLY PRESSURE TO THE BRAKE PEDAL TO GET IT TO STOP STILL REQUIRED MORE STOPPING DISTANCE. BRAKES DID NOT BECOME FULLY FUNCTIONAL UNTIL AFTER PLACING THE VEHICLE IN PARK AND SHUTTING THE VEHICLE DOWN WAITING FOR APPROXIMATELY 15 MINUTES. RESTARTED THE VEHICLE AND BRAKE WERE FUNCTIONING PROPERLY. THIS EVENT OCCURED AT APPROXIMATELY 46,000 MILES ON THE VEHICLE. FOLLOWING DAY BROUGHT THE TRUCK INTO THE LOCAL GMC DEALER AND VERIFIED THAT THE TRUCK HAS A BRAKING PROBLEM FOUND A LEAKING BRAKE BOOSTER AND MASTER CYLINDER.

Mileage: 46,500

AT LOW SPEED AND ON A NUMBER OF OCCASIONS, THE BRAKES HAVE SEEMED TO LOSE POWER AND IT REQUIRED A LOT OF BRAKE PRESSURE TO STOP THE VEHICLE AND AVOID HITTING ANOTHER VEHICLE, MY GARAGE, ETC. IT HAD BEEN HAPPENING INTERMITTENTLY OVER THE PAST MONTH OR SO. WENT IN TO THE DEALER AND THEY REPLACED THE VACUUM PUMP AT A COST OF APPROX $600.

Mileage: 65,000

VACUUM PUMP FAILED AT 58000 MILES. LOST BRAKE ASSIST AT PARKING LOT SPEEDS. COULD HAVE CAUSED AN ACCIDENT.

THE BRAKES AT A LOW RATE OF SPEED (1-10 MPH) PARTIALLY GIVES OUT WHICH PROLONGS THE STOPPING DISTANCE OF THE VEHICLE. IT SEEMS AS THOUGH THE ABS KICKS IN BUT FOR NO REASON. MUST STRONGLY PUSH DOWN ON THE PEDAL TO GET VEHICLE TO STOP, WHICH STILL REQUIRES ADDITIONAL STOPPING DISTANCE. HAS OCCURRED SPORADICALLY FROM MID-2018 TO MARCH 2019. NO RESOLUTION THROUGH DEALERSHIP.

Mileage: 50,000

BRAKES COMPLETELY FAILED. REPLACED BRAKES ON ALL 4 WHEELS, BUT TO NO AVAIL. THEN REPLACED THE MASTER CYLINDER AND STILL NO BRAKES. MY FENCE POLE AND MAILBOX STOPPED MY VEHICLE.

Mileage: 56,000

WHEN I FIRST GOT THE TRUCK THE BRAKES OPERATED PERFECTLY FINE AFTER ABOUT THREE DAYS THE BRAKES ON THE FRONT OF THE TRUCK WOULD LOCK UP WHILE I WAS DRIVING AND WOULD NOT RELEASE. AFTER TWO SETS OF CALIPERS TWO SETS OF BRAKE PADS A SET OF ROTORS A TWO WEEKS GO BY WITH THE MECHANIC TRYING TO FIGURE OUT WHAT IS WRONG WITH THIS TRUCK. THEY THEN REPLACE THE BRAKE MASTER CYLINDER, THERE WAS NO IMPROVEMENT. TURNS OUT TO BE THE BRAKE BOOSTER HAD FAILED ALONG WITH THE HYDRAULIC ABS CONTROL UNIT. THERE WERE NO WARNING LIGHTS ON WHATSOEVER THE WHOLE ENTIRE TIME THE BRAKES WERE LOCKED UP THE ABS LIGHT DIDN'T COME ON UNTIL THE BRAKE BOOSTER WAS REPLACED INDICATING THAT THE ABS CONTROL UNIT WAS ALSO BAD. NOW I AM EXPERIENCING A TICKING COMING FROM THE ENGINE. THE TICKING OCCURS AT IDLE END AS THE THROTTLE IS BEING ACTIVATED. HOWEVER THE LOCAL DEALERSHIP HAS REFUSED TO GIVE ME ANY INFORMATION AS OF WHY IT COULD BE MAKING THIS TICKING NOISE OR IS JUST UNWILLING TO SAY ANYTHING .

Mileage: 46,000

I PUSHED ON THE BRAKES WHEN SLOWLY PULLING INTO A PARKING SPOT AND THE BRAKES GOT SQUISHY AND BARELY STOPPED BEFORE I HIT ANOTHER PARKED CAR. THIS HAPPENED A FEW TIMES BEFORE I GOT THE VEHICLE HOME. THEN A MESSAGE POPPED UP THAT SAID "SERVICE BRAKE ASSIST SYSTEM". I TOOK THE TRUCK IN AND THEY SAID THEY WOULD NEED TO REPLACE THE VACUUM PUMP AND 2 BELTS.

Mileage: 77,000

BRAKE ASSIST WARNING LIGHT CAME ON WITH HARD BRAKE PEDAL AT LOW SPEED BRAKING. DOES NOT HAPPEN OFTER. BROUGHT TO DEALER AND HAD TESTED WITH NO TROUBLE FOUND. DEALER SAID NO RECALLS OR SERVICE BULLETINS ON ISSUE.

Mileage: 22,000

BRAKES NOT WORKING. HAD TO REPLACE THE VACUUM PUMP BELT, BRAKE BOOSTER VACUUM PUMP, AND AC BELT. COST $573.86. VEHICLE ONLY HAS 40K MILES. VERY DANGEROUS, VEHICLE WOULD NOT STOP WHEN APPLYING BRAKES

AT LOW SPEEDS BREAKING BECOMES EXTREMELY DIFFICULT LEADING TO LONGER STOPPING DISTANCE.

Mileage: 41,000

BRAKES FADE AT LOW SPEEDS, VEHICLE CONTINUES TO TRAVEL WHILE THE BRAKES ARE APPLIED. HARD BRAKE PEDAL PRESSURE MUST BE APPLIED TO STOP.

Mileage: 40,000

I WAS ON A MAJOR HIGHWAY TRAVELING WHEN THE TRAFFICE BECAME STOP AND GO. AS I WAS TRAVELING IN HEAVY TRAFFIC FOR ABOUT 5 MINUTES, MY BRAKE BECAME STIFF AND WOULD NOT ALLOW ME TO STOP AS NORMAL. I WAS ABLE TO STOP JUST SHORT OF REAR-ENDING THE VEHICLE IN FRONT OF ME, HOWEVER IT WAS MERELY BY INCHES. CONSIDERATIONS : I WAS ON A SLIGHT DECLINE AND MY VEHICLE HAS START ASSIST WHERE THE BRAKE PEDAL REMAINS STIFF WHEN IN EFFECT, IT FELT LIKE THIS ACTIVATED. I CONTINUED TO INCREASE PRESSURE THROUGH WHICH I THOUGHT I HEARD THE ABS ACTIVATE AND THE VEHICLE STOPPED.

Mileage: 49,000

BRAKE PEDAL OR THAT INCREASED EFFORT IS NEEDED TO DEPRESS THE BRAKE PEDAL. ALSO, IN SOME CASES A TICK OR TICKING NOISE MAY BE HEARD, WHICH MAY SOUND LIKE AN EXHAUST MANIFOLD LEAK.

AT LOW SPEEDS BREAK PEDAL WILL NOT DEPRESS AND I HAVE A HARD TIME STOPPING THE TRUCK. I ALMOST HIT A CAR YESTERDAY AND AFTER DOING SOME RESEARCH FOUND THAT THE VACUUM PUMP FAILURE IS A KNOWN PROBLEM. THIS IS EXTREMELY SCARY AND DANGEROUS. SOMEONE COULD EASILY HIT A PEDESTRIAN. MY TRUCK HAS LESS THAN 50,000 MILES, WHICH SEEMS TO BE THE AVERAGE FOR THIS PROBLEM.

Mileage: 48,400

SEVERAL TIMES AT LOW SPEED MANEUVERING THE BRAKE PEDAL BECAME HARD, REQUIRED INCREASED EFFORT TO DEPRESS, AND BRAKING DISTANCES WERE INCREASED. OCCURS RANDOMLY AND WITHOUT WARNING. NO ACCIDENTS YET, BUT SEVERAL CLOSE CALLS. VEHICLE HAS ONLY 44,000 MILES.

Mileage: 44,000

BRAKE PEDAL GOES SOFT AND CAN HIT THE FLOOR ON OCCASION. MOSTLY HAPPENS WITH IN REVERSE. 40K MILES. ALSO TRANSMISSION SHIFTS ARE ERRATIC. RPM CAN SHOOT UP BETWEEN SHIFTS.

Mileage: 36,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT STATED THAT WHEN THE BRAKE PEDAL WAS APPLIED, THE VEHICLE FAILED TO RESPOND. THE CONTACT HAD TO APPLY FORCE TO THE BRAKE PEDAL TO STOP THE VEHICLE. LAURA BUICK GMC (903 N BLUFF RD, COLLINSVILLE, IL 62234, (618) 344-0121) DIAGNOSED THAT THE BRAKE VACUUM PUMP MAY NEED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE CONTACT WAS UNCERTAIN IF THE FAILURE WAS RELATED TO NHTSA CAMPAIGN NUMBER: 14V339000 (STEERING, SERVICE BRAKES, HYDRAULIC). THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VIN AND FAILURE MILEAGE WERE NOT AVAILABLE.

AT SLOW SPEEDS THE BRAKE ASSIST DOES NOT WORK. REQUIRES MUCH MORE EFFORT TO STOP VEHICLE. SEEMS RELATED TO FAULTY VACUUM PUMP AS MENTIONED BY OHTERS ON INTERNET FORUMS.

Mileage: 55,000

WHEN APPLYING BRAKES AFTER FIRST PUSH THE PEDAL GETS HARD AND DOESN'T STOP HARDLY. DOES IT EITHER GOING FORWARD OR REVERSE. HAS HAPPENED NUMEROUS TIMES SINCE TRUCK WAS BOUGHT NEW.

LOSS OF POWER BRAKES WHEN CREEPING AND APPLYING BRAKES SEVERAL TIMES IN A SHORT TIME. TESTED AND CHANGED VACUUM PUMP.

Mileage: 40,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING AT LOW SPEEDS OR WHEN THE GEAR SELECTOR WAS IN REVERSE, THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD. THE CONTACT MENTIONED THAT THE FAILURE OCCURRED PERIODICALLY. THE VEHICLE WAS TAKEN TO EVERETT BUICK GMC (21115 I-30 FRONTAGE RD, BRYANT, AR 72022, (501) 303-4393) TO BE DIAGNOSED, BUT NO FAILURE WAS FOUND. THE DEALER STATED THAT THE BRAKES WERE "PERFECT". THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VIN WAS NOT PROVIDED. THE FAILURE MILEAGE WAS 45,000.

Mileage: 45,000

I WAS DRIVING DOWN A HILL AT ABOUT 15 MILES AN HOUR AND WHEN I WENT TO PRESS THE BRAKE PEDAL I HEARD A NOISE AND THE BRAKE PEDAL WENT TO THE FLOOR AND TRUCK WOULD NOT STOP. I HAD TO SWERVE OFF THE ROAD TO AVOID A COLLISION. AFTER, THE BRAKE PRESSURE RETURNED WHILE DRIVING, BUT WHEN STOPPED IT WOULD LOSE PEDAL FEEL AND GO BACK TO THE FLOOR. AFTER READING ARTICLES IT WAS OBVIOUS THE VACUUM PUMP WAS FAILING. I LIMPED THE TRUCK HOME AND TOOK IT TO THE DEALERSHIP AND AM WAITING TO HEAR BACK.

Mileage: 69,850

THERE IS A KNOWN BRAKE PROBLEM CAUSED BY FAULTY VACUUM PUMP. WITH THE VACUUM PUMP FAILING THERE WILL BE LOSS OF ASSISTED BRAKING. SOME PEOPLE HAVE NOTED REQUIRING 2 FEET TO STOMP ON THE BRAKES TO STOP THE TRUCK. THE DANGEROUS BRAKING PROBLEM SEEMS TO HAPPEN DURING LOW SPEEDS. SOME MEMBERS ON THE FORUMS HAVE MENTIONED GETTING INTO ACCIDENTS. GMC DOES NOT COVER THE VACUUM PUMP UNDER THEIR WARRANTY WHICH IS RIDICULOUS. I HAVE LISTED SOME FORUM THREADS AS PROOF OF NOT JUST ME HAVING THIS ISSUE. HTTPS://WWW.SILVERADOSIERRA.COM/ECOTEC3-5-3L-V8/BRAKE-BOOSTER-VACUUM-PUMP-FAILURE-T686609.HTML HTTPS://WWW.SILVERADOSIERRA.COM/BRAKES/ROCK-HARD-BRAKE-PEDAL-2014-LOW-SPEED-T595097.HTML HTTPS://WWW.GM-TRUCKS.COM/FORUMS/TOPIC/204871-VACUUM-PUMP-GOING-OUT/ HTTPS://FOX6NOW.COM/2018/11/23/GM-UNDER-INVESTIGATION-FOR-FAULTY-BRAKE-VACUUM-PUMPS/ EVEN THE GOVERNMENT IS INVESTIGATING.

Mileage: 30,000

IT STARTED HAPPENING A WEEK OR SO AGO WHERE WHEN IN REVERSE OR AFTER SWITCHING FROM REVERSE TO DRIVE AND TRYING TO BRAKE THE PEDAL WOULDN'T COMPRESS, IT WAS AS IF THEY WERE LOCKING UP ON ME. I WOULD HAVE TO PUT MOST OF MY BODY WEIGHT ON THE PEDAL TO EVEN GET THE TRUCK TO STOP, TO THE POINT WHERE I ALMOST RAN INTO MY NEIGHBORS CAR BACKING OUT OF THE DRIVEWAY. IT SEEMED TO MAINLY HAPPEN AT SLOWER SPEEDS, IN BOTH DRIVE AND REVERSE AS IT HAPPENED ON MORE THAN ONE OCCURRENCE. LUCKILY I DECIDED TO TAKE IT TO THE GMC DEALER BEFORE ANYTHING SERIOUS HAPPENED, BUT THIS IS A HUGE SAFETY CONCERN AND I FEEL IT NEEDS TO BE ADDRESSED. THE DEALER ALSO KNEW EXACTLY WHAT THE ISSUE WAS BEFORE I COULD GIVE THEM ANY INFORMATION, SO IT SEEMS LIKE THIS IS A COMMON PROBLEM. THEY REPLACED MY VACUUM PUMP AND WE WILL SEE IF THAT FIXES THE PROBLEM.

Mileage: 72,000

BRAKE PUMP WENT OUT ALMOST RAN INTO A POLE. READING ONLINE AND SEE A LOT OF PEOPLE HAVING THE SAME PROBLEM. ANGRY!!

Mileage: 57,000

WHILE DRIVING AT SLOW SPEEDS, THE BRAKE PEDAL BECAME VERY HARD TO PUSH. THIS CAUSED THE TRUCK TO BE DIFFICULT TO STOP, WHICH CAUSED ME TO ALMOST REAR-END THE VEHICLE IN FRONT OF ME. THIS HAS HAPPENED SEVERAL TIMES. IN RESPONSE TO THIS, THE GMC DEALER REPLACED THE VACUUM PUMP.

Mileage: 90,500

I WAS PULLING A TRAVEL TRAILER AT 55 MILES AN HOUR, I CAME OVER A HILL TO AN INTERSECTION AND I HAD LOST MY BRAKES. I MANAGED TO FINALLY COME TO A STOP. I DISCONNECTED MY TRAILER. I WENT TO A LOCAL GMC DEALERSHIP, AND THEY DID NOT HAVE TIME TO REPAIR MY VEHICLE. I TOOK IT TO AN INDEPENDENT REPAIR SHOP,AND THEY SAID MY VACUUM BRAKE BOOSTER PUMP HAD FAILED. THEY INSTALLED A NEW VACUUM BREAKER BOOSTER PUMP FOR THE NEXT DAY. THIS WAS A VERY DANGEROUS SITUATION, AS I LOST 95% OF MY BREAKING POWER WHILE PULLING MY TRAVEL TRAILER.

Mileage: 28,182

WHEN BACKING UP, AFTER REPEATEDLY PRESSING THE BRAKE PEDAL, THE BRAKE PEDAL WENT TO THE FLOOR AND WOULD NOT STOP THE TRUCK. THE TRUCK ROLLED UNCONTROLLABLY DOWN THE DRIVEWAY AND LUCKILY DID NOT HIT ANYONE OR ANYTHING. IT COULD HAVE KILLED SOMEONE THOUGH. THE SAME ISSUE OCCURRED IN A PARKING LOT WHEN BACKING UP IN AN OPEN SPACE. AFTER REPEATED HITTING THE BRAKE PEDAL TO LINE UP THE VEHICLE, THE BRAKES STOPPED WORKING AN I COULD NO LONGER STOP THE TRUCK.

Mileage: 70,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING 15-25 MPH, THE BRAKE PEDAL WAS DEPRESSED, BUT WAS DIFFICULT TO SLOW DOWN OR STOP THE VEHICLE EFFICIENTLY. THE CONTACT STATED THAT THE BRAKE PEDAL WAS VERY STIFF. THE VEHICLE WAS TAKEN TO KUNES COUNTRY CHEVROLET BUICK GMC OF ELKHORN (LOCATED AT 1350 WI-67, ELKHORN, WI 53121, (262) 725-4068) WHERE IT WAS DIAGNOSED THAT THE VACUUM PUMP WAS WEAK. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOT CONTACTED. THE APPROXIMATE FAILURE MILEAGE WAS 68,800. *TT CONSUMER STATED VEHICLE WAS REPAIRED. *JB

Mileage: 68,500

I PULLED INTO A PARKING SPOT AND LOST THE ABILITY TO STOP MY TRUCK. THE BRAKES LOCKED UP AND I COULDN'T PUSH DOWN ON THE BRAKE PEDAL HARD ENOUGH TO GET THE TRUCK TO STOP. I WAS GOING SLOW ENOUGH TO USE THE CURB IN THE SPOT FOR IT TO STOP ME FROM HITTING ANYTHING. I HAD MY CAR TOWED TO A REPAIR SHOP AND THEY CONFIRMED THAT THE BRAKE VACUUM PUMP FAILED AND HAD TO BE REPLACED ALONG WITH THE MASTER CYLINDER AND BECAUSE THE VACUUM PUMP WAS THE INITIAL POINT OF FAILURE, THE REPAIR WAS NOT COVERED UNDER MY WARRANTY.*DT VEHICLE REPAIRED *JB

Mileage: 91,450

I FIRST NOTICED THE PROBLEM WHEN I WAS BACKING DOWN THE RAMP TO LAUNCH MY BOAT. GENERALLY I CAN LIGHTLY TOUCH THE BRAKES AND THE TRUCK WILL STOP IMMEDIATELY. BUT THIS TIME IT DID NOT AND I HAD TO PUMP MY BRAKES MULTIPLE TIMES BEFORE IT FINALLY CAME TO A STOP. I WAS QUIT ALARMED BUT KINDA BLEW IT OFF. THE TRUCK HAD TRAVELED ABOUT SIX FEET FURTHER THAN I HAD ANTICIPATED. ABOUT A WEEK LATER I STOPPED TO GO THROUGH MY GATE AT MY FARM AND WHEN I DROVE THROUGH THE GATE WHICH IS ON A SLIGHT HILL DECLINE IT HAPPENED AGAIN. I WENT TO TOUCH THE BRAKES TO STOP AND ENDED UP PUMPING THE BRAKES VIOLENTLY IN ORDER TO GET THE TRUCK TO STOP. THIS TIME I TRAVELED ABOUT SEVEN OR EIGHT FEET BEFORE COMING TO A FULL STOP. AFTER THIS INCIDENT I WAS CONVINCED TO TAKE IT TO THE DEALERSHIP. IT OCCURRED ONCE MORE DURING THAT TIME. THE DEALERSHIP SAID IT WAS A MALFUNCTION IN THE VACUUM PUMP THAT WORKS OFF OF THE MAIN ENGINE AND OIL FROM THE ENGINE HAD CONTAMINATED THE BRAKING SYSTEM. I HAD TO HAVE REPLACED A PUMP, BOOSTER, CYLINDER, PIPE, AND FLUID FOR A TOTAL OF 1266.33 DOLLARS. THAT INVOICE NUMBER IS 208452. I FEEL THIS IS A SERIOUS SAFETY ISSUE WHEN YOU THINK YOUR VEHICLE IS GOING TO STOP AND IT DOES NOT. THIS CAN CAUSE A PANIC SITUATION!

Mileage: 62,580

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING 25 MPH, THE CONTACT HEARD A GRINDING NOISE EMERGING FROM THE FRONT DRIVER SIDE OF THE VEHICLE. THE VEHICLE WAS TAKEN TO HENNESSY BUICK GMC (7261 JONESBORO RD, MORROW, GA 30260) WHERE IT WAS DIAGNOSED THAT THE BRAKE VACUUM PUMP NEEDED REPLACEMENT. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND PROVIDED CASE NUMBER: 8-4881978797. THE VEHICLE WAS REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 102,000.

Mileage: 102,000

WHEN DRIVING FORWARD OR BACKWARDS AT LOW SPEED BRAKE PEDAL SEEMS LIKE IT LOCKS UP AND IT IS EXTREMELY HARD TO STOP THE VEHICLE I HAD TO PRESS THE PARKING BRAKE A COUPLE TIMES JUST TO GET IT TO STOP

Mileage: 75,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING 5 MPH, THE BRAKES SEIZED. WHILE DRIVING OVER 5 MPH, THE BRAKES PERFORMED NORMALLY. THE VEHICLE WAS TAKEN TO BAGLIER BUICK GMC (248 PITTSBURG RD, BUTLER, PA 16001, 742-602-4676) WHERE IT WAS DIAGNOSED THAT THE VACUUM PUMP FRACTURED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 49,000. THE VIN WAS UNKNOWN. *BF

Mileage: 49,000

ON NOVEMBER 17TH 2018 MY BRAKES WENT OUT ON A 2015 GMC 1500 AT 35 MPH STOPPING AT A RED LIGHT WHICH JUST TURNED GREEN .I SWITCHED LANES AND ALMOST CRASHED. I HAD MY GRANDCHILDREN IN THE VEHICLE ALONG WITH MY WIFE. THE VEHICLE NEED TO BE TOWED TO A GMC DEALER. THE DIAGNOSES WAS THE VACUUM PUMP TOTAL FAILURE THE BRAKE PEDAL WAS HARD WITH NO STOPPING POWER. MY GMC HAD 34000 MILES ON IT . NOW I HAVE A TOW BILL AND REPAIR COST FOR A PART GM WILL NOT RECALL. THIS WAS REPORTED TO GM AND THEY OPENED A CASE AND CLOSED IT. THE SAID THEY WOULD GIVE A HUNDRED DOLLAR COUPON. THIS IS RIDICULOUS SOME ONE IS GOING TO GET KILLED BECAUSE OF THIS FAULTY PART. I THOUGHT THEY WOULD BE WILL TO HELP AND MAKE THINGS RIGHT . GM CASE 8-4845403712 THANKS THIS CORPORATION NEEDS TO BE RESPONSIBLE.

Mileage: 34,000

AT SLOW SPEED BACKING UP OR MOVING FORWARD, I LOSE POWER ASSIST FOR BRAKING, HAVING TO ALMOST STAND ON THE BRAKES TO STOP. THIS HAPPENS INTERMITTENTLY. STREET OR PARKING LOT.

Mileage: 64,000

I BOUGHT THIS TRUCK IN DEC.2017 SENSE MARCH/ APRIL OF 2018 I HAVE EXPERIENCED AT LEAST 8 TIMES MAYBE MORE AND JUST LAST WEEK. THE BRAKE PEDAL HAD LOST IT'S POWER ASSIST. THIS SEEMS TO HAPPEN IN VERY CLOSE SLOW SPEED TRAFFIC OR IN PARKING LOTS WHEN PARKING. THE WAY I SOLVE THIS PROBLEM IS TO PUT TRUCK IN NEUTRAL AND INCREASE RPM'S OR YOU 2 FEET ON THE BRAKE PEDAL ITHE POWER ASSIST WILL SOON RETURN, THESE SITUATION COULD BE A REAL PROBLEM AT HIGHER SPEEDS. I HAVE CHECKED THE VACUUM BOOSTER FOR LEAKS, BRAKE FLUIL AND DONE A FRONT AND REAR BRAKE JOB. THE WEEK OF NOV. 18 I SAW AN ARTICLE IN THE BOSTON GLOBE ABOUT THIS SPECIFIC PROBLEM AND UNDER INVESTIGATION. I CONTACTED MY LOCAL DEALER CENTRAL BUICK AND GMC IN NORWOOD MA..ON NOV 26.2018 THE SERVICE WRITER SAID HE KNEW NOTHING ABOUT THIS PROBLEM OR COMPLAINTS NOR THE ONGOING INVESTIGATIONS. HIS THOUGHT WAS BRING THE TRUCK IN AND WE WILL CHECK AND REPAIR AT MY EXPENSE. SADLY I WISH HIS RESPONSE WAS DIFFERENT . THANKYOU D.S.M.

Mileage: 43,000

BRAKE SYSTEM FAILURE. BRAKE PEDAL WOULD DEPRESS TO THE FLOOR AND STOP WORKING AS THE TRUCK WAS SLOWING DOWN. THIS WOULD HAPPEN IN ALL BRAKING SITUATIONS. I TOOK THE TRUCK TO THE DEALERSHIP AND THEY STATED THE VACUUM PUMP FAILED. $1142.67 FOR REPAIR! NOV 15/ 2018.

Mileage: 115,000

EXPERIENCED AN UNUSUAL REACTION TO BREAKING. A FEW DAYS LATER I HAD BRAKE WARNING LIGHTS ON THE DASH. TOOK THE VEHICLE TO THE DEALER AND THEY HAD TO REPLACE THE CYLINDER BRAKE MASTER AND THE BRAKE BOOSTER AND ADD NEW FLUID. WHICH I PAID FOR. NOW I SEE THERE MAY BE OTHER ISSUES AS THERE ARE OTHER COMPLAINTS YOU'RE INVESTIGATING. I WANT TO PUT MINE ON RECORD.

Mileage: 32,631

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING AT A LOW SPEED OR WHILE IDLING, THE BRAKE PEDAL WAS DEPRESSED AND FAILED TO ENGAGE. THE CONTACT STATED THAT THE FAILURE WAS ALSO EVIDENT WHILE DRIVING IN REVERSE AT A LOW SPEED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE LOCAL DEALER AND THE MANUFACTURER WERE NOT NOTIFIED. THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 14V339000 (STEERING, SERVICE BRAKES, HYDRAULIC). THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 55,000. *TT*JB

Mileage: 55,000

WHEN I PRESS ON THE BRAKES, IT FEELS AS THOUGH THE MASTER CYLINDER IS GONE AND IT IS THE MANUAL TYPE DRUM BRAKES THAT HAS AIR IN THE LINE. IT TAKES EVERYTHING I HAVE TO PRESS THEM AND PRAY IT STOPS!! THE VEHICLE IS ALWAYS IN MOTION WHEN DETECTING THIS PROBLEM AND SEEMS TO OCCUR MORE REPEATEDLY IF THE BRAKES ARE PUMP QUICKLY IN SUCCESSION BEFORE APPLYING BRAKES OR WHEN THE BRAKES ARE PRESSED FOR AN EXTENDED AMOUNT OF TIME THEN YOU RELEASE AND REPRESS IT WANT STOP. ANOTHER ISSUE IS MY LANE ID WARNING. WHEN TURNED ON AT THE BUTTON, IT JUST BEEPS AT ME AND SHOWS SERVICE LIGHT. WHEN I FIRST TOOK IT IN WITH THE PROBLEM, THE DEALERSHIP CALLED ME AND SAID ALL FIXED, BUT IT DID IT BEFORE I LEFT THE PARKING LOT. THEY HAD MY TRUCK ALL DAY FOR THE ISSUE, PUT ME OUT OF A VEHICLE AND THEN SAID THEY WOULD NEED FOR EXTENDED TIME TO REPAIR BUT DIDN'T KNOW THERE WAS PROBLEM. HOW DO YOU MAKE THAT DETERMINATION WHEN YOU TOLD ME ITS REPAIRED. I JUST TURNED IT OFF AND HAVEN'T USED IN 2 YEARS.

Mileage: 62,000

ON SEVERAL OCCASIONS THE BRAKE PEDAL BECOMES DIFFICULT TO DEPRESS. RELEASING THE PEDAL AND DEPRESSING AGAIN CORRECTS THE PROBLEM. TODAY WHILE EXITING A PARKING SPACE AT LOW SPEED TO AVOID COLLIDIONG WITH ANN APPROACHING VEHICLE IT TOOK BOTH FEET TO DEPRESS PEDAL. I AM A 200 LB. MALE. I AM NOT SURE A SMALL FEMALE COULD HAVE CORRECTED THE FAILURE IN A TIMELY MANNER.

Mileage: 30,000

AT SLOW SPEEDS FROM A STOP IF YOU LET OFF THE BREAK PEDAL AND IMMEDIATLY REAPPLY THERE SEEMS TO BE EXTREMELY HARD BREAKING. ALMOST IMPOSSIBLE TO STOP THE CAR.

Mileage: 49,000

BRAKES APPEAR TO LOSE BOOST WHEN STOPPING. HAVE TO PRESS PEDDLE WITH BOTH FEET. THIS HAS HAPPENED ON THREE SEPARATE OCCASIONS.

Mileage: 60,000

BRAKES BECOME VERY HARD TO PRESS IN TRAFFIC AND WHILE BACKING UP. THE CONDITION WORSENS WITH MULTIPLE PRESSES OF THE BRAKE PEDAL. THE STOPPING DISTANCE OF THE TRUCK IN INCREASED EVEN WITH INCREASED PRESSURE ON THE PEDAL. THE TRUCK HAS 28,463MI. I CONTACTED A DEALERSHIP AND THEY WILL NOT COVER THIS REPAIR. I HAVE ORDERED THE PARTS AND WILL PERFORM THE REPAIR MYSELF. GM HAS ISSUED A SERVICE BULLETIN ON THIS PIT5361B.

Mileage: 28,438

VEHICLE LOSES BRAKE PRESSURE WHILE MOVING AT SLOWER SPEEDS. ONCE COMING TO A STOP, THEN DOING SLOW SPEED STOPS AND STARTS THE PEDAL WILL BECOME HARD AND REQUIRES GREAT EFFORT TO BRING THE VEHICLE TO A COMPLETE STOP. ISSUE STARTED AT ABOUT 38,000 MILES JUST AFTER FACTORY 36,000 MILE WARRANTY. ISSUE PRESENTS ITSELF MORE OFTEN IN REVERSE WHILE BACKING IN, ESPECIALLY IF GRADE IS SLOPED. HAVE HAD MULTIPLE CLOSE CALLS IN PARKING LOT SETTINGS WHILE TRYING TO BACK IN TO A PARKING SPOT OR INCH FORWARD. A FRIEND HAD THIS SAME ISSUE WITH HIS 2016 CHEVROLET SILVERADO, WHICH ENDED UP BEING A $1,800 FIX THROUGH THE DEALERSHIP. HE WAS TOLD THAT IT WAS A VACUUM ISSUE WITH THE BRAKE PUMP AND THAT A RECALL WOULD PROBABLY BE ISSUED. I HAVE BEEN HOLDING OUT ON SERVICE IN HOPES OF THIS RECALL BEING ISSUED.

Mileage: 38,000

COMPLETE BRAKE FAILURE WITH NO WARNINGS. DEALER DIAGNOSTIC REPORTS FROZEN VACUUM PUMP. THE CONDITION WAS ENCOUNTERED IN MOTION ON A COUNTY RD.

Mileage: 59,000

DURING LOW SPEED BRAKING MANEUVERS WHILE PARKING IN MY DRIVEWAY BRAKE PEDAL PRESSURE REQUIRED TO STOP BECAME VERY HARD. IT TOOK BOTH FEET ON THE PEDAL TO ACTUALLY STOP THE TRUCK. THIS WOULD HAPPEN DAILY WHILE BACKING IN TO MY DRIVEWAY. ALSO DURING NORMAL CITY STOP AND GO DRIVING IT WOULD ALSO REQUIRE GREAT EFFORT TO STOP THE TRUCK AND THE PEDAL WOULD BE VERY HARD TO PRESS.

Mileage: 42,900

STOPPED TO TAKE A BREAK WHILE TRAVELING. AS WE WENT TO EXIT THE PARKING AREA AND STOP AT THE STOP SIGN, NO REAL BRAKING POWER. HAD TO PUT BOTH FEET ON THE PEDAL AND PRESS INTO IT TO COME TO A STOP. WE WERE TRAVELING AT ABOUT TWO MPH. NO WARNING THERE WAS A PROBLEM. ONE MINUTE WE HAD GOOD BRAKES, THE NEXT, NOT. LUCKILY THERE WAS NO TRAFFIC, AS WE WERE UNABLE TO STOP AT THE STOP SIGN AND FINALLY CAME TO A STOP IN THE RIGHT LANE IF THE ROAD. THE MECHANIC STATED THE REED IN THE VALVE OF THE PUMP CAME APART.

Mileage: 95,790

HARD BRAKE PEDAL - "NO BRAKES" FIRST OCCURRENCE IN PARING LOT 2016 TIMEFRAME . WAS BACKING INTO A SPOT THAT WAS SLIGHTLY DOWNHILL, NO BRAKES , VEHICLE HIT CURB AND STOPPED. PULLED FORWARD NO BRAKE, EVENTUALLY THEY CAME BACK . COMPLAINED TO GM HOTLINE - THEY RESPONDED WITH QUESTIONS AND I TOLD THEM I TOOK TRUCK TO DEALER, I BELIEVE DEALER REPLACED MASTER CYLINDER SECOND OCCURRENCE MAY 2017 DRIVING ON I-75 - 18 YEAR OLD DAUGHTER DRIVING ON WAY HOME FROM COLLEGE, TRAFFIC SLOWED AND SHE SAID "I HAVE NO BRAKES, PEDAL WONT MOVE". SHE MANEUVERED TO SIDE OF ROAD, VEHICLE TURNED OFF AND THEN BACK ON, BRAKES CAME BACK AND WORKED OK . MENTIONED DURING OIL CHANGE AT SERRA CHEVROLET, BUT SINCE BRAKES WERE WORKING THEY WOULD NOT INVESTIGATE THIRD EVENT - NOVEMBER 16-- AT TAIL END OF 8 HOUR DRIVE RETURNING FROM DEER CAMP. EXIT FREEWAY AND IN STOP AND GO TRAFFIC , ON A DOWNHILL PORTION OF ROAD, THE BRAKE WENT HARD . GOT VEHICLE STOPPED AND TURNED ENGINE OFF AND BACK ON, BRAKES RELEASED. CONTACTED DEALER ABOUT BRINGING TRUCK IN THIS WEEK. GOING TO ED RINKE DEALERSHIP TODAY NOV 24, I READ ARTICLE ABOUT THE A FAULTY BRAKE VACUUM PUMP. THIS NOW MAKES SENSE. PLEASE GET THIS ISSUE FIXED

Mileage: 40,000

IN STOP AND GO TRAFFIC ON HIGHWAY AT LOW SPEED EXPERIENCED BRAKE PEDAL STIFFENING AND DIFFICULTY STOPPING. REOCCURRED SEVERAL TIMES DURING SAME TRAFFIC PATTERN BUT ONLY AT THE LOW STOP AND GO SPEED. PROBLEM OCCURRED WITH NO WARNING. BRAKES WORKED AS NORMAL UNDER OTHER CIRCUMSTANCES. FORUM RESEARCH SUGGESTED THIS WAS A VACUUM PUMP AND OCCURRED TO OTHER MODELS OF SAME YEAR AND MILLAGE. VACUUM PUMP (INTERNAL) FAILURE WAS CONFIRMED ISSUE BY GM DEALER AND REPLACED. MILEAGE WHEN PROBLEM OCCURRED WAS APPROXIMATELY 47,200 MILES. VEHICLE IN GOOD CONDITION, NO WRECKS ,REGULAR MAINTENANCE, AND NOT USED FOR TOWING OR HEAVY HAULING.

Mileage: 47,200

I FIRST NOTICED THE ISSUE ON THE MORNING OF SATURDAY, NOVEMBER 10TH AS I WAS BACKING INTO A PARKING SPOT. AS I WAS BACKING IN, I NOTICED ALL OF A SUDDEN THE BRAKE PEDAL WAS ON THE FLOOR AND I WAS ABOUT TO PLOW INTO A CURB AND THREW THE TRUCK IN PARK. I DIDN'T THINK ANYTHING OF IT. THE SECOND TIME IT HAPPENED WAS ONE DAY LATER AS MY FIANCE AND I HAD JUST COMPLETED A 200 MILE DRIVE HOME. I WAS PULLING INTO THE PARKING LOT AT OUR TOWNHOUSE COMPLEX AND AS I WAS PULLING FORWARD TO BACK INTO THE SPACE, I NOTICED I HAD NO BRAKING POWER WHATSOEVER. I HAD TO THROW THE TRUCK IN PARK TO KEEP IT FROM HITTING A NEIGHBORS VEHICLE. I OPENED THE HOOD WITH THE ENGINE RUNNING, AND NOTICED A TICKING NOISE I HADN'T HEARD BEFORE AND MY BRAKE PEDAL ONLY HAD ABOUT 1/4" OF TRAVEL LEFT. I COULD PULL THE PEDAL BACK TO WHERE IT IS SUPPOSED TO BE BUT IT WOULD JUST FALL BACK DOWN TO THE FLOOR. I WAS ABLE TO VERY SLOWLY AND CAREFULLY PARK THE TRUCK USING PARK AND THE PARKING BRAKE. WITH THE ENGINE STILL RUNNING AND THE VEHICLE IN PARK, I DEPRESSED WHAT WAS LEFT OF THE BRAKE PEDAL AND HELD IT TO THE FLOOR AND HEARD A MOANING NOISE COMING FROM THE AREA NEAR THE MASTER BRAKE CYLINDER AND COULD FEEL THE BRAKE PEDAL SHUDDERING UNDER MY FOOT. I FEEL UNSAFE DRIVING THIS VEHICLE AND I WAS GIVING NO WARNING OF THE BRAKE FAILURE. I AM HAVING THE VEHICLE TOWED TO SEWELL BUICK GMC IN DALLAS AND WILL UPDATE WHEN THEY FIND CAUSE. I WILL ALSO BE CALLING GM CUSTOMER SUPPORT AS I FEEL THIS IS A HUGE SAFETY HAZARD.

Mileage: 88,000

WHEN GOING UNDER 15MPH BRAKE PEDAL BECOMES HARD AND DOESN'T WORK. VEHICLE HAS 50K MILES. BRAKE BOOSTER DECLARED BAD BY MECHANIC. THIS ISSUE ALMOST CASUED ACCIDENT.

Mileage: 51,000

TRUCK LOOSES BRAKING ABILITY AT LOW SPEEDS SUCH AS TRAFFIC OR PARKING LOTS.

Mileage: 35,000

ISSUE WHEN BRAKING THAT CAUSES THE BRAKE PEDAL TO LOSE POWER AND CAUSES THE DRIVER TO DEPRESS THE PEDAL EXTREMELY HARD TO HAVE THE BRAKES ENGAGE. THE CAUSE APPEARS TO BE A FAULTY VACUUM PUMP THAT REQUIRES REPLACEMENT. THIS COULD BE POTENTIALLY A LARGE SAFETY ISSUE IF THE PUMP FAILS AND THE VEHICLE IS UNABLE TO BE STOPPED IN TIME TO AVOID A POSSIBLE COLLISION. THIS ISSUE HAS OCCURRED BOTH WHILE IN TRAFFIC ON A CITY STREET AND WHILE ATTEMPTING TO PARK THE VEHICLE.

Mileage: 44,264

THE VACUUM PUMP CONTROLLING THE BRAKES HAS FAILED. WHEN THE BRAKE IS PRESSED IN STOP/GO TRAFFIC, IT WILL FIRST STOP THE VEHICLE, BUT IF THE BRAKE IS RELEASED THEN PRESSED AGAIN, THE BRAKES WILL NOT WORK AND THE VEHICLE CONTINUES TO ROLL FORWARD. A MECHANICAL/ELECTRICAL NOISE CAN BE HEARD BEFORE THIS OCCURS. THIS IS MORE NOTICEABLE ON WET ROADS OR ROADS WITH A STEEP DECLINE.

Mileage: 45,000

AT LOW SPEEDS (PARKING SPEED, SCHOOL PICKUP LINES, CREEPING TRAFFIC SPEED) THE BRAKE PEDAL WILL LOSE ALL BOOST PRESSURE. THE BRAKE PEDAL BECOMES EXTREMELY STIFF AND INEFFECTIVE. THIS SITUATION OCCURRED ON A FEW OCCASIONS AND CAUSED GREAT ALARM WITH MYSELF AND MY WIFE. GREAT POTENTIAL EXISTS FOR AN ACCIDENT INVOLVING MACHINERY, ANIMALS OR HUMAN BEINGS. THE VEHICLE WAS TAKEN PROMPTLY TO THE LOCAL GMC DEALERSHIP FOR SERVICE WITH A COPY OF GM SERVICE BULLETINNO.: PIT5361B. THE DEALER KEPT THE VEHICLE FOR SEVERAL DAYS TO PERFORM AN EXISTING SAFETY RECALL FOR STEERING ANOMALIES (RECALL # 18289) AS WELL AS DIAGNOSE AND REPAIR THE BRAKE BOOST ISSUE. SERVICE BULLETIN PIT5361B WAS FOLLOWED AND THE VACUUM PUMP ASSEMBLY WAS REPLACED TO RESOLVE THE BRAKE BOOST ISSUE. THIS REPAIR OCCURRED AT 40728 MILES - JUST BEYOND WARRANTY COVERAGE TERMS. TOTAL COST OF REPAIR $686.56. THE BRAKE BOOST ISSUE HAS NOT REOCCURRED TO DATE SINCE THE REPAIR. THIS VEHICLE IS NOT ABUSED OR INVOLVED IN ANY RIGOROUS ACTIVITY. IT IS A GENERAL USE VEHICLE AND IS USED PRIMARILY FOR FAMILY ERRANDS AND ROAD TRIPS.

Mileage: 40,728

WHEN BRAKES ARE APPLIED THE PEDAL IS HARD AND VEHICLE DOES NOT STOP. IT SEEMS TO HAPPEN WHEN GOING SLOW FOR EXAMPLE IN PARKING LOTS ETC. I HAVE READ OTHER ARTICLES WHERE PEOPLE ARE EXPERIENCING SAME THING AT HIGH AND LOW SPEEDS. IT DOES NOT HAPPEN ALL THE TIME, BUT IT STARTED 11/2017 AND I'VE EXPERIENCED THIS FOUR TIMES NOW AND THE WIFE AS WELL.CALLED GM THE OTHER MORNING WAS TOLD THERE WAS NO RECALL FOR THIS ISSUE PER GM SOME VEHICLES WERE AFFECTED BUT NOT MINE, EXPLAINING WHAT I'VE FOUND AND WAS TOLD TO TAKE THE VEHICLE TO DEALER FOR DIAGNOSTIC.ASKED IF IT WOULD HAVE TO BE THE DEALER CAUSE THEY WERE EXPENSIVE TO DO DIAGNOSTIC. WAS TOLD YES AND IT WOULD HAVE TO BE OUT OF POCKET.

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. AN INDEPENDENT MECHANIC CALLED ON BEHALF OF THE VEHICLE OWNER, WHO IS DEAF. THE CONTACT STATED THAT THE BRAKE PEDAL FAILED TO DEPRESS AND STOP THE VEHICLE PROPERLY. THE CONTACT DIAGNOSED THAT THE VACUUM PUMP AND THE BRAKE BOOSTER SYSTEM WERE MALFUNCTIONING. THE DEALER (GULF COAST CHEVROLET BUICK GMC, 1901 W. FM 523, ANGLETON, TX 77515, (800) 593-5226) STATED THAT THERE WERE NO RECALLS ON THE VEHICLE. THE MANUFACTURER WAS CALLED AND THE CONTACT WAS PROVIDED A CASE NUMBER. THE MANUFACTURER STATED THAT THE VEHICLE HAD TOO MANY MILES TO BE COVERED BY THE EXTENDED WARRANTY. THE FAILURE MILEAGE WAS 69,000.

Mileage: 69,000

VEHICLE IS SHUTTING OFF AT ANY GIVEN SPEED, IE. 35 MPH IN TOWN OR 70 MPH ON A HIGHWAY WITH ONCOMING TRAFFIC. WHEN VEHICLE SHUTS OFF, LOSS OF ALL CONTROL OF THE VEHICLE TAKES PLACE. NO BRAKES, NO STEERING, NOTHING UNTIL THE VEHICLE RANDOMLY TURNS BACK ON. THIS IS NOT A CONSISTENT OCCURRENCE TO KNOW WHEN IT IS GOING TO HAPPEN OR BE PREPARED FOR IT TO HAPPEN. I WATCHED MY HUSBAND SHOOT ACROSS THE ROAD INTO THE OTHER LANE AND ALMOST PUT THE VEHICLE OVER A BANK ONE NIGHT WHEN IT HAPPENED. THIS HAS BEEN AN ISSUE SINCE JANUARY 2018 FOR US, WE HAVE TAKEN IT TO THE DEALER WHERE IT WAS PURCHASED MULTIPLE TIMES FOR THEM TO TELL US THEY CAN'T DUPLICATE THE ISSUE AND NOTHING IS COMING UP IN THEIR SYSTEM FOR AN ERROR CODE. IT HAS CAUSED A MAJOR INCONVENIENCE FOR MY FAMILY, AS WE DON'T DARE PUT OUR CHILDREN IN THE TRUCK LEAVING THE RESPONSIBILITY SOLELY ON ONE PARENT TO TRANSPORT THE KIDS TO AND FROM DAYCARE. I WORRY FOR THE SAFETY OF MY HUSBAND ON A DAILY BASIS.

Mileage: 32,500

HARD BRAKE PEDAL WHEN ATTEMPTING TO STOP, HAPPENS ON HWY WITH FAST SPEEDS, SLOW SPEEDS IN PARKING GARAGE AND IN REVERSE.

Mileage: 53,000

WHILE DRIVING AT HIGHWAY SPEED, I ENTERED AN OFF RAMP TO FIND NO POWER ASSIST TO MY BRAKES. THE PEDAL WAS EXTREMELY STIFF. I CAME VERY CLOSE TO HAVING A COLLISION WITH THE CAR IN FRONT OF ME. I CONTACTED MY MECHANIC IMMEDIATELY, HE CHECKED IT OUT AND IT APPEARS THE VACUUM PUMP HAS FAILED WITHOUT WARNING. I HAVE OWNED THIS VEHICLE SINCE NEW AND HAVE HAD NO PROBLEMS WITH IT UNTIL THIS ISSUE.

Mileage: 79,500

I WAS BACKING UP AND THE BRAKE PEDAL GOT HARD AND WOULD NOT STOP THE TRUCK. I TRIED TO GO FORWARD AND THE SAME THING HAPPEN.

Mileage: 47,600

VACUUM PUMP VACHOSE ASSY BRAKE BOOSTER AND MASTERCYCLINDER FAILURE WHICH CAUSE BRAKE FAILURE WHILE DRIVING. HAPPENED SEVERAL TIMES UNTIL 'SERVICE TRAILER BRAKE' LIGHT CAME ON. NO BRAKES, NO WAY TO PRESS DOWN PEDAL. GMC REFUSES TO ASSUME RESPONSIBILITY FOR REPAIR. COST: $1311.16

Mileage: 60,000

HAVING ISSUES WITH HARD BRAKE PEDAL. IT HAPPENED A FEW TIME WHEN THE TRUCK WAS NEW BUT COULD NEVER DUPLICATE IT. TWICE IT ALMOST CAUSED AN ACCIDENT. I HAVE SINCE FOUND A WAY TO DUPLICATE IT. WHEN BACKING A BOAT TRAILER DOWN A RAMP EVERY TIME THEY BECOME HARD, I HAVE TO RIDE THE EMERGENCY BRAKE, BUT IT ONLY HAPPENS WHEN THE BOAT IS ON THE TRAILER. I HAVE RESEARCHED THIS OVER THE YEARS BUT NOT TILL RECENTLY HAVE I SEEN OTHER REPORTS OF TRUCK WITH THIS ISSUE. I HAVE NOT CONTACTED THE DEALER YET BUT WILL IN THE NEXT WEEK OR SO WHEN I CAN TAKE OFF TO GO. I DO NOT NOW DATE OF FIRST OCCURRENCE BUT I PUT A RANDOM DATE IN 2015.

Mileage: 8,000

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT STATED THAT THE VEHICLE FAILED TO PASS STATE INSPECTION DUE TO MASTER CYLINDER, VACUUM PUMP, BRAKE BOOSTER, AND HOSE LEAKAGE. THE DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURES. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 33,000.

Mileage: 33,000

WHEN BRAKES ARE APPLIED THE PEDAL IS HARD AND VEHICLE DOES NOT STOP. IT SEEMS TO HAPPEN WHEN GOING SLOW FOR EXAMPLE IN PARKING LOTS ETC. I HAVE READ OTHER ARTICLES WHERE PEOPLE ARE EXPERIENCING SAME THING AT HIGH SPEEDS. IT DOES NOT HAPPEN ALL THE TIME, BUT IT STARTED 7/1/2018 AND I'VE EXPERIENCED THIS FOUR TIMES NOW. TOOK TO DEALER THIS MORNING THEY REFUSED TO LOOK AT ARTICLES EXPLAINING WHAT I'VE FOUND.

Mileage: 37,000

WHILE IN MOTION THE BRAKE PEDAL GOES HARD AND IS DIFFICULT TO STOP. I BELIEVE THIS IS THE CAUSE OF A LOW SPEED INCIDENT I HAD EARLIER THIS YEAR. THE ISSUE OCCURRES MOSTLY AT SLOW SPEEDS IN STOP AND GO TRAFFIC. IF FEELS LIKE THE BRAKE BOOSTER FAILS AND THE PEDAL IS BOTTOMED OUT. IT HAPPENS FREQUESNTLY WHILE HAULING A TRAILER IN REVERSE. VERY DANGEROUS SITUATION.

Mileage: 40,000

BRAKE FAILURE DUE TO BAD VACUUM PUMP

Mileage: 39,000

WHILE DRIVING IN STOP AND GO TRAFFIC SPEEDS THERE HAVE BEEN A NUMBER OF OCCASIONS THAT THE BRAKE PEDAL GOES HARD AND THE TRUCK WILL NOT STOP. I HAVE NOTICED ON OTHER FORUMS THAT THIS SEEMS TO BE A COMMON ISSUE.

Mileage: 70,000

I WAS DRIVING DOWN I20 IN DALLAS IN RUSH HOUR TRAFFIC, THE TRAFFIC WAS HEAVY BUT MOVING AT 70 MILES AN HOUR. I SAW BRAKE LIGHTS IN FROM OF ME, WHEN I PRESSED THE BRAKE TO SLOW DOWN THE BRAKE PEDAL WAS HARD, I COULD NOT PRESS IT WITH ONE FOOT AND I COULD NOT SLOW DOWN. I FINALLY WAS ABLE TO SLOW DOWN BY PUTTING BOTH FEET ON THE PEDAL WITH ALL MY WEIGHT IT FELT LIKE IT WAS FOREVER BEFORE I WAS ABLE TO SLOW DOWN. I THOUGHT I WAS GOING TO BE UNABLE TO STOP.I DROVE ANOTHER 15 MINUTES GOING VERY SLOW AND SCARED. PARKED MY TRUCK IN THE DRIVE AND HAD A TOW TRUCK PULL IT TO THE DEALERSHIP CLOSEST TO MY HOUSE. MY TRUCK ONLY HAS 58,000. I REALLY WAS SCARED FOR MY LIFE IF YOU HAVE EVER DRIVEN IN RUSH HOUR DALLAS TRAFFIC YOU UNDERSTAND . I COULD HAVE LOST MY LIFE OR BE SERIOUSLY INJURED. THE DEALERSHIP TOLD ME TODAY THEY HAD NOT HEARD OF THIS ISSUE. THE DEALERSHIP SAID THEY DOUBT GMC CAN DO ANYTHING ABOUT THE PROBLEM. THE SERVICE DEPARTMENT SAID WAS A VACUUM PUMP ON THE BREAKS. I LOOKED ON LINE AND OTHERS HAVE REPORTED THIS SAME ISSUE. I COULD HAVE BEEN KILLED. STILL SHAKING OVER THE INCIDENT . I HOPE THIS PROBLEM IS ADDRESSED BEFORE SOMEONE IS KILLED

Mileage: 58,000

BRAKES LOOSE BOOST AT IDLE AFTER TOWING TRAILER. I TOWED A HEAVY TRAILER AND THEN DROPPED IT IN MY YARD. WHEN I WENT TO MOVE MY TRUCK DOWN MY DRIVEWAY AND INTO MY GARAGE I HAD NO BRAKE BOOST UNLESS I REVVED THE ENGINE.

Mileage: 70,000

I WAS FOLLOWING MY DAUGHTER WHO WAS EXITING THE GAS STATION AND PULLING OUT ONTO ROUTE 149. AS SHE PULLED UP TO ROUTE 149 SHE STOPPED TO CHECK TRAFFIC. I WAS BEHIND HER IN MY 2015 GMC SIERRA 1500, GOING APPROX. 2 MPH. WHEN I HIT THE BRAKES, NOTHING HAPPENED. THE TRUCK KEPT MOVING FORWARD AND I HIT THE REAR OF MY DAUGHTERS CAR, CRACKING THE REAR BUMPER. NO DAMAGE TO THE TRUCK BECAUSE I WAS ONLY GOING A COUPLE MPH, LUCKILY MY DAUGHTER HAD HER FOOT ON THE BREAK OF HER CAR, OTHERWISE I WOULD HAVE PUSHED HER RIGHT INTO ONCOMING TRAFFIC. THE FACT THAT SHE HAD HER FOOT ON THE BRAKE IS WHAT STOPPED MY TRUCK. WE BOTH BACKED UP AND GOT OUT OF THE INTERSECTION, WHEN BACKING UP THE BRAKES WORKED FINE. THERE WASN'T A SPOT TO LEAVE THE TRUCK SO I HAD TO DRIVE 3 MILES BACK TO MY HOUSE. THE BRAKES WORKED PERFECTLY AFTER, NO ISSUES WHAT SO EVER. IT SEEMED LIKE AT THE SLOW SPEED THAT BRAKES DIDN'T HAVE ANY BOOST (OR PRESSURE), THE PEDAL WAS VERY VERY STIFF, IT FELT LIKE IT WAS PUSHING BACK AGAINST ME WHEN I HIT THE REAR OF MY DAUGHTERS CAR. BUT DRIVING HOME EVERYTHING WORKED PERFECT. I'M BRINGING THE TRUCK IN (APPROX. 72K MILES) TO HAVE IT LOOKED AT BUT I'M CONCERNED THE DEALER WILL NOT KNOW WHAT TO FIX AS THE ISSUE SEEMS TO BE INTERMITTENT. THIS WAS A VERY DANGEROUS INTERSECTION AND I COULD HAVE PUSHED MY DAUGHTER INTO ONCOMING TRAFFIC AND THE RESULT WOULD HAVE BEEN MUCH MUCH WORSE. SOMETHING SEEMS TO BE SERIOUSLY WRONG WITH THE BRAKES AND WHEN GOOGLING THIS ISSUE, I FOUND MANY SIMILAR ISSUES/COMPLAINTS REGARDING THE BRAKES.

Mileage: 72,000

TAKATA RECALL WHEN BACKING UP BRAKE PEDAL IS NOT AT ITS NORMAL PRESSURE SEEMS TO BE ALL THE WAY DOWN SO HAVE TO PRESS BRAKE HARDER TO STOP THE TRUCK WHEN I SHIFT TO DRIVE FORWARD SAME THING APPLIES. AFTER TRUCK HAS BEEN OFF FOR SOME TIME PARKED THEN START TO DRIVE BRAKES SEEM TO BE WORKING FINE.

Mileage: 65,000

BRAKES BECAME HARD TO DEPRESS AND ENGAGE WHILE VEHICLE WAS MOVING. ALMOST CRASHED VEHICLE. AFRAID TO DRIVE. BROUGHT TO DEALER. SAID IT WAS BAD BRAKE BOOSTER. AFTER DOING SOME RESEARCH, FOUND OUT SHOULD REPLACE VACUME PUMP, MASTER CYLINDER, HOSE LINE, ETC., SO I DID. 44K MILES, 3 YEAR OLD TRUCK, HAPPENED ON /12/10/17 BROUGHT TO DEALER GARBER GMC IN FLORIDA FOR $1300 REPAIR ON 12/11/2017. NO WARNING SIGNS WHEN THIS HAPPENED. VERY DANGEROUS WHEN BRAKES FAIL WHILE VEHICLE IS IN MOTION.

Mileage: 44,000

I WAS PULLING INTO A PARKING SPOT AT WORK (SLOW SPEED) AND I COULD NOT STOP THE TRUCK. I KEPT APPLYING MORE AND MORE PRESSURE TO THE BRAKE PEDAL AND IT DID NOT STOP THE TRUCK. THE TRUCK HIT THE CURB AND STOPPED, LUCKILY THERE WASN'T A ANOTHER CAR AS I WOULD HAVE HIT IT. IT CAUGHT ME A BIT OFF GUARD AS I WAS TRYING TO FIGURE OUT WHAT JUST HAPPENED. I BACKED THE TRUCK UP ABOUT 10 FEET, BRAKES WORKED FINE IN REVERSE, AND PULLED FORWARD BACK INTO THE SPOT. AGAIN, THE BRAKES DID NOT WORK AND I AGAIN I HIT THE CURB. NO DAMAGE TO THE TRUCK, BUT BRAKES DID NOT WORK. IT FELT LIKE THE BRAKES WERE PUSHED BACK AGAINST ME. BRAKE PEDAL NEVER WENT TO THE FLOOR, I PUSHED THE PEDAL AND THERE SEEMED TO BE MORE RESISTANCE THAN NORMAL. IT DIDN'T MATTER HOW MUCH I PUSHED, THE TRUCK KEPT MOVING FORWARD. THIS HAPPENED WITH APPROXIMATELY 78,000 MILES. I WAS LATE FOR A MEETING SO I WENT INTO WORK AND LATER IN THE DAY I HAD A BREAK SO I CHECKED ON THE TRUCK. PULLED OUT OF THE PARKING SPOT AND BACK IN AND BRAKES WORKED BOTH IN REVERSE AND IN FORWARD. SO NOW WHAT TO DO????????? AT WORK I DID A QUICK GOOGLE SEARCH AND SAW THIS SIMILAR ISSUE COME UP IN A LOT OF THE SEARCH RESPONSES- AND DECIDED TO LOG IT HERE. THIS IS A HUGE ISSUE AND VERY DANGEROUS IF I WAS IN A CROWD OR PEOPLE OR AT AN INTERSECTION AND COULDN'T STOP. I CALLED GMC AND THEY SAID THEY NEVER HEARD OF ANYTHING LIKE THIS- THEY DIDN'T SEEM TO CARE, THEY SAID IF I BROUGHT THE TRUCK IN THEY WOULD SEE IF IT HAPPENED AGAIN.

Mileage: 78,000

WE WANT TO REPORT A SAFETY FEATURE IN 2015 GMC SIERRA 1500. WE BOUGHT A VEHICLE BRAND NEW AND IT CURRENTLY HAS ABOUT 40,000 MILES ON THE ODOMETER. ON 11/4/2017 AFTER WE GOT OFF THE INTERSTATE 10, THE BREAK FROM THIS TRUCK STOPPED WORKING, WE HAD A DIFFICULT AND DANGEROUS TIME TO MAKE IT STOP, AND WAS LUCKY TO MANAGE TO GET INTO A STORE'S PARKING. WE HAVE TO HAUL IT TO THE LOCAL GMC ON MONDAY AND FOUND OUT THE BREAK PUMP WAS BAD. THIS PROBLEM COULD CAUSE A DEADLY ACCIDENT IF WE WERE STILL IN THE FREEWAY. WE CALLED GMC TO REPORT THE PROBLEM AND THEY SAID THERE IS NOTHING THEY CAN DO. THIS PROBLEM IS SERIOUS AND NEED TO BE ADDRESSED.

Mileage: 40,600

OUT OF NO WHERE, I HAD TO USE EXTREME PRESSURE ON THE PEDAL TO STOP THE TRUCK. THE BRAKES BEGAN TO SOUND ROUGH. I TURNED THE TRUCK ON AND OFF HOPING THAT WOULD FIX THE PROBLEM. IT DIDN'T, I TOOK IT INTO MY GMC DEALER TO FIND OUT THAT THE VACUUM PUMP HAS FAILED FOR THE BRAKES. I DID MY RESEARCH ONLINE AND NOTICED MANY PEOPLE HAVE HAD THE SAME ISSUE. I WAS SURPRISED THERE ISN'T A RECALL ON 2014-2016 GM VEHICLES. THIS IS DANGEROUS AND I'D HATE SOMEONE'S BRAKES FAILING AT HIGH SPEED AND SOMEONE GETS HURT.

Mileage: 30,000

2015 GMC SIERRA - BRAKING BECOMES VERY DIFFICULT AT IDLE SPEED WHETHER MOVING FORWARD OR REVERSE. BRAKE PEDAL BECOMES VERY DIFFICULT TO DEPRESS. VEHICLE WILL MOVE A FEW FEET UNTIL COMPLETELY STOPPED EVEN WITH FORCEFUL PRESSURE ON THE BRAKE PEDAL. APPEARS TO LOSE ALL VACUUM/POWER BRAKING ABILITY.

Mileage: 50,000

AT 47,000 MILES. I NOTICED A SLIGHT VIBRATION IN THE FRONT END WHILE BRAKING ON THE HIGHWAY. OVER THE NEXT 2 WEEKS THE VIBRATION BECAME CONSIDERABLE WORSE. IT FELT AS THOUGH THE ROTORS BECAME WARPED WHICH I HAVE EXPERIENCED DURING VEHICLE TESTING AT PREVIOUS EMPLOYMENTS. I REPLACED THE FRONT BRAKE ROTORS AND BRAKE PADS. DURING REMOVAL OF THE OLD BRAKES, I QUICKLY NOTICED THAT 1 OF THE 4 PADS WAS COMPLETELY CORRODED THROUGH THE BACKING PLATE. BRAKE PAD CONTACT AREA WITH THE ROTOR WAS FINE, BUT THE BACKING PLATE HAD HOLES IN IT FROM THE LEVEL OF CORROSION. OTHER 3 BRAKE PADS WERE FINE, VERY MINOR SURFACE CORROSION AT WORST. SINCE REPLACING MY BRAKES THE VIBRATION HAS NEVER REPEATED.

Mileage: 47,000

BRAKE PEDAL DOES NOT DEPRESS EASILY AT LOW SPEEDS. EXTREAM EFFORT IS REQUIRED TO PUSH BRAKE PEDAL ENOUGH TO GET VEHICLE TO STOP.

Mileage: 41,000

TL* TAKATA RECALL. THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT STATED THAT THE BRAKE PEDAL WAS DIFFICULT TO DEPRESS. THE CONTACT HAD TO APPLY EXTREME FORCE TO THE BRAKE PEDAL TO ENSURE THAT THE VEHICLE CAME TO A COMPLETE STOP. THE VEHICLE WAS TOWED TO A DEALER (COVERT CHEVROLET BUICK GMC BASTROP, 702 TX-71, BASTROP, TX 78602, (512) 303-2311) FOR FURTHER INSPECTION AND DIAGNOSTIC TESTING. THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 14V339000 (STEERING, SERVICE BRAKES, HYDRAULIC). THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VEHICLE WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 16V651000 (AIR BAGS, SEAT BELTS). THE APPROXIMATE FAILURE MILEAGE WAS 29,004. PARTS DISTRIBUTION DISCONNECT.

Mileage: 29,004

I WAS IN A PARKING LOT (THANKFULLY) WHEN THE BRAKE PEDAL WAS HARD TO PUSH, AND THE TRUCK DID NOT STOP IMMEDIATELY. THERE IS A TECHNICAL SERVICE BULLETIN ISSUES FOR THIS PROBLEM PIT5405B.

Mileage: 57,000

BACKING BOAT DOWN BOAT RAMP (NOT A STEEP RAMP) IN TRAILER MODE, BRAKING DID NOT STOP VEHICLE. PUMPED PEDAL SEVERAL TIMES, USED LOTS OF FORCE ON PEDAL. BECAUSE OF SLOW SPEED AND INCREASED EFFORT, THE VEHICLE DID STOP. PULLED FORWARD AND REPEATED AT SLOWER REVERSE SPEED AND SAME POOR BRAKING. DRY CONDITIONS, BRAKES DRY, DID NOT PUT REAR WHEELS IN WATER. HAVE NOT HAD A REPEATED EVENT. DEALER INDICATED THAT SERVICE BULLETIN PIT5361B APPLIES, BUT BECAUSE OF MILEAGE IT IS NOT WARRANTY. THIS SHOULD BE A RECALL.

Mileage: 69,200

BRAKE FAILURE WHILE TOWING A 3500 POUND BOAT. VACUUM BOOSTER SYSTEM FAILURE. I WAS MOVING SLOWLY THROUGH A PARKING LOT PULLING MY BOAT, WHEN I PUSHED THE BRAKES THE TRUCK DID NOT STOP. THE BRAKE PEDAL BOTTOMED OUT AND THE TRUCK AND TRAILER CONTINUED TO MOVE FORWARD SLOWLY

Mileage: 31,000

ON 2/5/2017 WHILE TURNING UNTO MY STREET THE STEERING WHEEL LOCKED AND I COULD NOT MOVE MY TRUCK FROM HITTING A BLOCK WALL. I ALSO TRIED BREAKING BUT THE CAR DID NOT STOP IN TIME TO NOT HIT THE WALL. I WAS DRIVING SLOWLY (20 MPH) BECAUSE I WAS IN A NEIGHBORHOOD AND ME AND MY FAMILY WERE ALL WEARING SEATBELTS SO NO ONE WAS SERIOUSLY INJURED. THE AIRBAGS DID NOT DEPLOY AT ALL. AND I ALSO BENT THE STEERING WHEEL IN HALF TRYING TO MOVE IT. I AM ATTACHING A PICTURE OF THE STEERING WHEEL ITSELF AND THE VEHICLE IS CURRENTLY AT CALIBER COLLISIONS FOR THE REPAIRS. I WENT TO THE GM DEALER AND THEY SAID THEY WOULD RUN DIAGNOSTICS AFTER THE TRUCK COMES OUT OF THE SHOP.

Mileage: 12,000