2017 GMC SIERRA 1500 Service Brakes Problems

I loose brake pedal at low speeds seen gm has recall for vacuum pump but shows mine not in recall

I was test driving this 2017 Sierra 1500 SLT and experienced issues while braking. Issues with brakes as the vacuum level drops the brake assist decreases which meant I had to use excessive force to get the vehicle to stop. No warning light, nothing to tell me there is a low pressure brake. This could result in a fatality if a small animal or child walks/runs in front of the truck while truck is moving forward or backwards at low speeds. The dealer doesn’t acknowledge any recall on this vehicle because it isn’t noted as such with GM. I worry that all of the other recalls (4 others) may be an issue too, which include Frontal Airbags not deploying during an accident, faulty wheel sensor causes opposite wheel to engage and cause the vehicle to pull to one side, fuel leak, and child seat anchoring restraint instructions not included in the owners manual.

My 2017 GMC Sierra Brakes started acting up a slow speed it would seem like there were no Brakes or Pedal would push very hard. I pulled into a parking space at the store and it was like I had no Brakes had to push pedal very hard and Thank god there wasn’t a car in front of me because I would have hit it. The truck has new front and back Brakes and Rotors put. The truck was throwing some codes and 3 out of the 4 codes pointed to faulty Vacume pump. I pull a camper and sometimes a side x side so this is very concerning and I hoping to get this expense covered by Recall like all the other Models with the same issues. I really don’t know why my truck isn’t being Recalled. This has been a good truck for me no complaints tell this.

2017 GMC Sierra almost hit a parked car in the store parking lot. Pedal was hard push down . Also when moving truck around in my yard at times the pedal is hard other times sounds like there is Air in the lines. Truck has all new Brakes and Rotors all the way around. I pull a Camper and Side x Side at times so this is scary.

I was slowing down in a parking lot to park. I applied the brake and the pedal was very stiff and the vehicle wound not stop. I finally stood on the pedal and it acted as though the antilock activated and started shuttering. It finally stopped without damage. A warning of service brake assist displayed on the dash. This began to happen about 3 months ago intermittently, but now is a more frequent action. I have not taken it to the dealer and thought of replacing the brake vacuum pump but don't know what to do. Any assistance you can provide will be greatly appreciated. Thank you and have a great day! [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Brakes at low speed do not work well, causing extended braking distance. Looks to be a previous vacuum brake pump issue, but is no recall on it now.

The vehicle has no power assist when at low RPMs and is a hazard that may cause an accident.

THE AFFECTED VEHICLE IS A 2017 GMC SIERRA 1500 4X4 CREW CAB TRUCK WITH LESS THAN 34K MILES. WHILE DRIVING THE VEHICLE TODAY THE BRAKES BECAME VERY HARD, LIKE A LOSS OF POWER BRAKES. FELT LIKE THERE WAS A LOSS OF VACUMN. AT SLOW SPEED IN REVERSE THE BRAKES "SHUDDERED" WHEN APPLIED. HAVE NOT TAKEN IT TO A DEALER AS IT JUST HAPPENED WHILE TRAVELING. CHECHED FOR INFORMATION FOR SYMPTOMS ONLINE AND FOUND GM HAD INITIATED A RECALL FOR THIS ISSUE SO I CHECKED THE NHTS WEB SITE TO SEE IT MY VEHICLE HAD A RECALL. SYSTEM INDICATED 0 UNREPAIRED RECALLS FOR MY VEHICLE. SO WANTED TO REPORT THE ISSUE.

The vehicle while driving just rapidly steers to one side out of nowhere and some of the times even breaks.

My vehicle has on two separate occasions experienced a failure where the steering locks up, the engine shuts down, and the dash displays warnings about stabilitrac and trailer wiring. The vehicle has had random electrical glitches for some time, but they have escalated to a safety issue. In doing research, my issues sound very similar to those issues which resulted in a recall to earlier vehicles of the same generation, on report 17V-414. Googling the issue also points to insufficient grounding at the battery and / or the G218 grounding connection.

At low speeds I have no brakes.

The incident occurred on [XXX]. My vehicle has 54,571 miles on it. The power brake assist function failed. I was backing into a parking space at a local fast food chain and experienced near brake failure. I had to stand, nearly full body weight pressure, on the brake pedal to get my truck to stop at very slow speed. I, again, backed a short distance of a couple of feet at the most and experienced the same issue when I tried to stop. I placed the vehicle in PARK and turned the engine and ignition key off, thinking the system possibly needed to reset. I started the truck and drove forward, very slowly, to another parking space and applied the brakes. I experienced near total brake failure again. I had my truck into Brogden GMC in Olathe, Kansas on [XXX], for general maintenance and a “brake pressure recall.” I had experienced a slight brake pressure issue on a couple of occasions prior to the recall. After the recall service was performed I did not experience a braking concern for some time. I did experience “soft braking” a couple of times after the recall was performed and attributed it worn brakes. On [XXX], at 50,596 miles, I upgraded my brakes by installing a Power Stop Z36 brake kit with slotted rotors and ceramic pads. I have not had a repeated experience of soft braking or brake failure until the [XXX] incident that I am currently reporting. It appears to me that the earlier recall did not completely address the brake failure issue with my 2017 GMC Sierra 1500 pick-up. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

When I hit the brakes it has no stopping power, hard to push brake pedal and when sitting at a complete stop it has been known to start going even though I have foot on brake.

It takes quite the amount of force to stop the vehicle brake pedal started feeling spongy and seems like it doesn’t have enough pressure constantly I have no brake fluid leaks or air in my lines it all comes down to the brake booster it seems like and I know a few vehicles had this problem but mine says it wasn’t but I believe it has been affected.

Service Trailer Brake System. This has happened in the past 3 Times, in which the local GMC Dealership has made me pay for New Batteries and other Fuel system issues. Dealership stated that this shows up because of a bad battery.

At low speeds the brake pedal gets hard and it feels like the antilock brake system is activating, I believe this is the issue with the Brake booster vacuum pump. GM isn't calling this a safety issue.

Service Trailer Brake System Defaulting and is taking more time to stop my 2017 GMC Sierra Truck.

Today August 22, 2023 at 2:30pm, just about to leave work home when I received a message on my dash board telling/showing me "Service Trailer Brake System". And that sign kept coming on every second all the way home from work, couldn't heard nothing else that us going on inside the car like my phone, radio, turn sign, etc..

1st incident - tried to park turned in and steering went wild stability control light came on & others then truck shut down. 2nd Incident 2 days later- tried to turn off street (with grandkids in car) same thing steering about snapped my wrists off- check engine light came on and others then truck off this was all in a matter of seconds. I turned it on the info system on dash told me to roll down and then roll up window. Husband when driving noticed barking issues - really having to pump brakes (week before) We looked up recalls they are there for both issues for my year make but I have a bigger engine that the recall states so I am not covered yet it is doing all that same stuff for the recall which my husband put it what the truck was doing and found recalls just not for our engine size- THIS TRUCK IS NOT SAFE TO DRIVE AS WHEN YOU TURN IT WILL SHUT OFF IMMEDIATELY. AND YOU LOSE ALL STEERING ETC I AM AFRAID TO DRIVE THIS TRUCK, ESPECIALLY AS WE HAUL OUR GRANDKIDS AND TRAVEL TO IDAHO ON VERY HIGH CURVY ROADS AGAIN NOT SAFE YOUR COMPONETS IT WANTS ME TO CHECK OFF WONLT LET ME CLICK ON ENGINE & AND OTHER

Brakes intermittently quit working at slow speeds. Sometimes while pushing on the brake pedal, the brakes don't respond, I have to increase the force placed on brake pedal. There is also a pulsating sensation at the pedal like the ABS is being applied, even though I am traveling at slow speeds, and it takes much longer to stop the vehicle. There are no warning lights that come on and there is nothing on the message center stating there is an issue. Has happened multiple time, usually in a parking lot, or in stop and go traffic. Also has happened when vehicle is in Reverse. Have never had the issue at highway speeds.

The brake line in the middle of the car broke because it's rusty, and all brake fluid is out, vehicle not braking

Backing up no brake assist and very hard to stop, not all the time but once happened going down boat ramp...

2017 GMC Sierra K1500 with 59,xxx miles. Recently noted braking issues with vehicle in parking lots or at slower speeds. The brakes are difficult to engage. I do not notice this issue when driving at higher speeds. On 3/27/23, I backed the vehicle out of my driveway and had a near miss collision as it was very difficult to engage the brakes and stop the vehicle. After the near miss, the brakes, calipers, and rotors were inspected and all were in good working condition. I contacted the dealership where the vehicle was purchased. The representative from the dealership informed me that this braking issue was addressed as a previous recall for N192268490 ZPSR (Product Safety Recall) on 5/24/21. On 5/24/21, I took the truck into the dealership for another issue and this recall was addressed at the same time. I was not having any issues with the brakes at that time. The representative informed me that the recall was closed on the truck, and they now charge $200/hr if I want to bring the vehicle in for service. The current braking issues appear directly related to the reported braking recall issue that was reportedly repaired on 5/24/21. The vehicle is not safe to drive and would appreciate assistance from the NHTSA to safely resolve the issue.

There has been a recall on the assisted braking pump. My truck is not on that recall as of now. But I am having the same braking trouble at slow speeds. Is there any way the company will fix this issue.

Brakes do not work a low speeds such as in parking area very hard to press brake pedal to stop vehicle.

Trailer Brake System Fault requiring service. Seems like its an issue a lot with Chevy and GMC Trucks.

The trailer brake system is displaying a warning. The truck has less than 50,000 miles and the tow option has never been used. I am told that it would be risky to use it without repair. this is a safety issue that should be a recall. I have checked and there are thousands with the same issue and it has gone on for years without being addressed by GM or NHTSA. It's time to step up and take care of this situation. There is no telling how many have been injured or killed by this. if nothing is done I will approach someone in the media.

While parking I was backing up to straighten the truck in the space. When I went to stop I noticed that "normal" pedal pressure was not stopping the truck and I could tell vacuum was not available to boost the brakes, causing me to have to "stand on the pedal", almost causing me to hit the car behind me. I purchased the truck used four months ago and when checking recalls the nhtsa says none are open so I assume it has been addressed but didn't fix the issue obviously.

Low speed brake assist failure in traffic.. Caused me to bump the person in front of me... Then a few days later I got the "service brake assist " on my dash.. Then my gmc app sent me a service soon warning... 2017 gmc sierra denali at 62500 miles.

Back up sensors not working. Truck also not having a vin number even though it was bought from the the Chevy dealership. Also was told the electrical system is not working properly

I was pulling in to a parking spot and pressed the brakes and the truck didn’t stop and I hit the sign. When I looked at the dash there was a “service brake assist “ warning on.

I am experiencing hard brake pedal and/or brake fade when attempting to apply the brakes. Their is a recall for this problem on other models, however my truck model year is not included for some reason. This has occurred on multiple occasions and has nearly caused an accident on those occasions. My truck also began to roll out of a parking spot and I had extremely hard brake pressure but no response from the brakes.

My 2017 GMC Sierra is experiencing similar issues with excessive force required, vibration in brake pedal at low speeds, and delays in stopping as found on 2018 and up trucks and SUVs. I notified the dealership about a year ago about the issue and it potentially being linked to the recall and they said it wasn't and they would have to charge me to inspect and repair. The issue can obviously lead to an accident if the brakes continue to worsen and fail. Also abrupt stopping at low speeds doesn't work efficiently putting anyone who steps out in front of my vehicle or stops abruptly in front of me at risk. A couple of times there was a diagnostics alert sent to my email stating an "issue with the antilock braking system was detected". There are already accidents reported with 2018 and up vehicles because of this issue. I feel the recall for the 2018 and up vehicles needs to be extended to 2017 vehicles to prevent accidents.

When pressing the brakes a few time at a low speed Iose brake power. There is already a recall out for this model but not my vin. This is my recall issue Brake Assist Decreased Due to Vacuum Loss

I purchased my vehicle in January 2022. On 11/18/22 I captured a photo across my dash stating that the trailer brake system needed to be serviced (photo attached) . This was the second time this message appeared within days. The vehicle continued to beep and flash for a long period of time clearing out my dash screen making it UNSAFE TO DRIVE. The beeping noise startled me, almost causing an accident on the freeway. I did not know what the warning meant as I wasn't towing a trailer. I wasn't towing anything and could not turn off the beeping sound or the flashing screen, in spite of hitting the dismiss button. I don't know why the message continued to go on and assuming there is an electrical shortage somewhere with the wiring. This needs to be recalled and fixed as it is a manufacturer issue. I do not have any aftermarket parts installed in this vehicle. This same alert message appeared again yesterday 12/5/22 as I was driving back from the airport. It continued for almost 2 hours while on the freeway and again I was not pulling or towing anything. I pulled over, checked my tailgate, turned off the vehicle and turned it back on and the message continued until I got home. It is very alarming and annoying and scared me. This is a big safety hazard and almost caused an accident again as the alert is very loud and flashes across, clearing out your screen, causing you to take your eyes off traffic looking ahead. This time, I was traveling in heavy traffic. Please investigate this further. Thank you

The service message appeared on the display after backing up "SERVICE BRAKE ASSIST" I searched this issue and found over 65 complaints for this vehicle year/make /model. I am at work and fear driving home as this issue has resulted in brake failure on some of the complaints noted. I have not contacted anyone yet, I wanted a recall notice as this is a safety issue and we cannot afford any costly vehicle repairs.

Hi I purchased this used 2017 GMC Sierra Denali on October of 2021 it’s been just only one year and while on the road with my trailer attached , I suddenly got a pop up on my display saying “service trailer brake system “ which caused me to be distracted with the chime and the warning being displayed repeatedly and overall left me with no power at all to my trailer brakes I would like to have this recalled and fixed at little to no cost due to the fact of the cheap and unsafe parts that are installed on these types of trucks by GMC

The service trailer brake system keeps coming on. The notification constantly alerts and it’s distracting my driving.

TRAILER BRAKE SYSTEM ERROR COMES ON. I DONT EVEN OWN A TRAILER OR HAVE EVER TOWED A TRAILER. IT CUTS POWER MOMENTARILY AND IS VERY VERY UNSAFE. PLEASE FIX BEFORE SOMEONE GETS HURT.

A Service "Trailer Brake System" message keeps coming up on my display constantly, over and over and over, I can't see the speed display, I can't hear the turn signal sound, it's extremally distracting and loud. When I looked this message up I found the wiring was faulty and my trailer brakes won't work.

The trailer brake system on my vehicle suddenly stopped working. I was alerted by a continuous chime and message saying "Service Trailer Brake System." My brakes stopped working and made it difficult for me to stop my vehicle and loaded trailer. It was very frightening because I had lost all trailer braking function and feared I would not be able to stop my vehicle. In addition, the chime and message are non stop and very distracting and cause some components of my dashboard to be inaccessible making things more dangerous. Unfortunately, the distracting and frustrating chime and message continue even without a trailer attached.

Loss of power assist at slow speed when backing or going forward. This has happened several times since I have had the vehicle. Brake pedal is very hard to press and vibrates.

EBCM needs to be reprogrammed. Larry Stovesand GMC in Paducah, KY will NOT service my recall because it was closed on 2019, research has shown that this programming may need to be done again. After telling them this info. they are now saying that they will not service my recall because it has a salvaged title. After researching how a salvaged title is still honorable for a free recall service they are now telling me to take it somewhere else.

The trailer brake System sensor keeps going off making the vehicle unbearable to drive. The transmission also jerks when it gets to 7 mph. I've taken the truck to the GMC dealer over 3 times to check the transmission problem and it still jerks. This has been a on going problem since the purchase of the vehicle.

Driving on the highway going approximately 64mph and the traffic lane shifted over and everyone started to slow down and when I went to apply some brake . The pedal got very hard and became very hard to push down effecting my ability to brake properly. This almost caused me to get into an accident and I had to shoot over to the breakdown lane giving me enough time to slow down. My pedal became very hard to push down. This problem continued throughout my travel and service brake assist came on after the fact

The contact owns a 2017 GMC Sierra 1500. The contact stated while driving approximately 30 MPH, he heard an abnormal noise and while depressing on the brake pedal, the vehicle failed to decelerate. The contact stated no warning light was illuminated. The contact was able to cruise to the side of the roadway until the vehicle decelerated. The contact stated he shifted into reverse to stop the vehicle completely, before shifting into park. The vehicle was not drivable. The contact towed the vehicle to his residence. The contact stated he had an independent mechanic come to his residence and he was informed that the brake caliper and the front passenger’s side brake pads needed to be replaced. The vehicle was not repaired but was pending repairs. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer had been informed of the failure. The failure mileage was 53,579.

Mileage: 53,579

while driving I get a repeating alarm chime and "Service Trailer Brake System" caution statement on dash panel. This alarm will go off as often as once every three seconds. It is both startling and a hazard to the driver and while towing condition of the trailer brakes is unknown.

Service trailer brakes light pops up and chimes over and over again. I've never pulled a trailer. It's distracting and will randomly go off. Seems to go off when gas is below 1/4 tank. Sometimes it goes months without happening. Sometimes it happens a few days in a row. The dealership says they can't do anything unless they see it go off.

Brakes have stopped working while driving down the road, previously they have occasionally glitches out primarily for example when I pull into a drive through restaurant or in a parking area. Service Brake Assist pops up.

The contact owns a 2017 GMC Sierra 1500. The contact stated while driving 70 MPH, the vehicle began to independently brake without depressing the brake pedal. The contact stated that the "trailer brake service" and the "service brake" warning light were illuminated. The contact pulled off the road safely and drove the vehicle to his residence. The contact had not taken the vehicle to a local dealer. The vehicle was not diagnosed or repaired. The contact had received an unknown recall letter from the manufacturer. The manufacturer had not been informed of the failure. The failure mileage was approximately 14,230. The VIN was unavailable.

Mileage: 14,230

The brakes are failing especially after braking while on an incline . Pressure on the pedal becomes mushy then hard and will not stop the vehicle. The truck has 90,000 miles on it. A brake assist light came on while backing down a hill and braking .

Leaving a parking lot and had a complete loss of brakes due to faulty vacuum pump.

My truck trailer Brake system continues to come on and my doors are locking and unlocking. It has my 4x4 trans rubbing as well. Its a non stop issue everytime I get into my truck it does this and it happened out of no where. I had this truck a little over a year now.

Still having the slow parking problem. Almost hit a car today when trying to stop while parking truck. Software update by dealer did not fix the problem. This happens every time I try to park and/or slow stopping at a crosswalk.

. THE ENGINE MOUNTED MECHANICAL VACUUM PUMP MAY DECREASE OVER TIME DECREASING THE AMOUNT OF VACUUM/ POWER BRAKE ASSIST, CAUSING VEHICLE NOT TO STOP. SAME AS MY 2016 GMC. I HAD TO ALSO HAVE THE ( EVAP CONTROL VALVE REPLACED). TRANSMISSION SURGES AND ON THE DOWN SHIFT ITS KNOCKING COMING TYO A STOP. .IN MY REAR ENDING A PARKED VEHICLE BECAUSE OF THE BRAKES PULSATING AND NOT STOPING SCARED ME. .DEALERSHIP. .DEALERSHIP .NO

Panel message with beep Saying: SERVICE TRAILER BRAKE SYSTEM

While backing up I hit the brakes and the pedal made a clicking noise. I pumped the brakes and it stopped. This has happen several times over the past several months. I made a compliant to the dealer while under warranty and they found nothing wrong. 62000 current miles on the vehicle. Safety issue???

While in a parking lot, I tried to slowly move forward and then come to a pause. My brakes didn't work quite right and the vehicle didn't stop for an additional 15-20 feet from where I would have liked to stop. Luckily I was just moving forward to get out of the way of another vehicle trying to drive behind me and I didn't have anything directly in front of me that I needed to stop before. If I was trying to stop for a pedestrian I would have certainly hit them. If I was trying to stop behind a vehicle who suddenly stopped I would have ran into the back of their vehicle. There has been a recall on similar vehicles; same make, model and year as mine for what appears to be the same issue. Recall # 19V645000 This has also happened in my garage while pulling in, and in another parking situation. The Service Brake Assist warning comes on the Information screen.

Transmission shifts extremely hard in low speed. transmission temperature sensor is bad causing warning light to be on. Brakes fade at low speed causing abs system to growl.

My brake pedal randomly gets extremely hard, causing my truck to not be able to stop as it should. This almost caused me to read end the vehicle in front putting everyone in danger. There are no warning lights on. There is a recall for this issue that my model year falls under however my vin says no open recalls. It’s a booster vacuum seal problem with the breaks. Very frustrating that my truck is experiencing this recall issue but is not included. This causes a huge safety issue.

I was backing my boat into the water at a boat ramp and my brakes got very hard to push when I was backing into the water. I had to stand on the brakes to get it to stop, if my wife had been backing the truck in, it would have been in the lake. I see that there are no recalls on this vehicle. I bought it about four months ago and don't know the history of any recalls that have been done. I also had the transmission problem with the shimmy, and per the GM dealer flushed the fluid and the shimmy has all but disappeared. I am glad, because when I ask if it didn't repair it would the transmission be covered under warranty, he said no because of the mileage. These reasons are probably why the guy traded it in in the first place.

no breaks loud sound grabbing breaks growling sound very loud sweeking sound happens all time

Stiff brake pedal at low speeds and brake assist error message

LOW SPEED BRAKING ISSUE. WAS IN A PARKING LOT TRYING TO PARK MOVING ABOUT 1 OR 2 MPH. TRUCK WOULD NOT STOP AND IT WAS LIKE THERE WHERE NO BRAKES UNTIL I PRESSED AS HARD AS I COULD. DOES NOT DO THIS AT NORMAL SPEEDS

Mileage: 62,000

ON 9/2019 THEY SUPPOSEDLY DID THE REPROGRAM TO FIX THE HYDRAULIC BRAKING ISSUE ON MY TRUCK. IT IS NOW DOING THE VERY SAME ISSUE AGAIN. I GO TO SLOW DOWN OR STOP AND FEEL LIKE ITS NOT SLOWING DOWN AND I PUMP THE PEDAL TO GET A GOOD PEDAL TO STOP. IT DOES THIS QUITE FREQUENT NOW. IS THERE ANYONE WHO CAN HELP ME SEE IF THIS CAN BE DONE AGAIN UNDER RECALL?

Mileage: 105,000

THIS HAPPENED MULTIPLE TIMES. THE BRAKE PEDAL IS HARD AT LOW IDLE, AND YOU HAVE TO STAND ON BRAKE PEDAL TO STOP THE VEHICLE. TYPICALLY HAPPENS WHEN TRYING TO BACK IN A PARKING SPOT OR IN STOP & GO TRAFFIC THE BRAKE PEDAL BECOMES HARD TO PUSH AND TRUCK DOESN'T STOP AS QUICKLY

Mileage: 83,000

I WAS DRIVING 50MPH AND WAS BEHIND A SEMI AS I STARTED TO PASS HIM I NOTICED AN ONCOMING CAR AND DECIDED THERE WASNT ENOUGH TIME TO PASS SO I STARTED TO PUSH THE BRAKE PEDAL TO SLOW DOWN AND GET BACK BEHIND THE SEMI AND THE BRAKES LOCKED UP WHICH PRODUCED AN UNCONTROLLABLE SPIN IN WHICH I DID A 180 DEGREE SPIN AND ENDED UP GOING INTO THE DITCH BACKWARDS AND TIPPED OVER ON MY SIDE NO AIRBAGS DEPLOYED EITHER.

Mileage: 72,000

WHEN I APPLY THE BRAKES IT DOESN'T WANT TO STOP AND I HAVE TO PUSH IT DOWN AGAIN ALMOST LIKE THERE IS A ISSUE WITH THE VACUUM ON THE BRAKES BUT IT SAYS MY VEHICLE IS NOT AFFECTED BY THE RECALL BUT THE SYMPTOMS ARE EXACTLY THE SAME AS THE RECALL.

Mileage: 112,000

AS I WAS BACK MY BOAT IN AT BOAT RAMP BRAKE PEDAL WAS HARD TO PRESS DOWN HAD TO ALMOST STAND ON THEM TO KEEP FROM TRUCK GOING IN THE WATER. I RESEARCHED THIS AND SEEN WHERE GM HAS A RECALL ON THE VACUUM PUMP BUT I CALL THE DEALER THEY TOLD ME THEY WASN'T A RECALL.

Mileage: 44,000

GMC SIERRA WAS BROUGHT TO DEALER FOR EXISTING RECALL REGARDING BRAKING. DEALER INDICATED RECALL HAD BEEN RESOLVED. WHILE BACKING THE TRUCK ON 3 SEPARATE OCCASIONS SINCE RECALL ADDRESSED, BRAKES BECOME MUCH LESS RESPONSIVE WITH CLICKING SOUND. BRAKES BECOME HARD TO PRESS AND DO NOT STOP VEHICLE COMPLETE. THIS ALSO HAPPENED WHILE TOWING A BOAT DOWN RAMP. THE VEHICLE HAS 28,000 MILES AND THE ISSUE DID NOT OCCUR PRIOR TO ABOUT A MONTH AGO. THE MOST RECENT TIME WAS TONIGHT WHILE BACKING ON LEVEL GROUND INTO GARAGE. I HAVE NOT HAD AN ACCIDENT AS A RESULT OF THIS, BUT THE RECALL WAS NOT ADEQUATELY PERFORMED OR DID NOT ADDRESS THE ISSUE.

Mileage: 28,000

AT LOW SPEED OR MOST OF THE TIME BACKING UP BRAKES DO NOT WORK WELL AT ALL. NEED TO PUSH VERY HARD.

Mileage: 70,000

I WAS DRIVING ON I-4 TOWARDS ORLANDO AT 70MPH FOLLOWING A SAFE DISTANCE TRAFFIC WAS COMING TO STOP AND I WENT TO BRAKE AND THE BRAKES WOULDNT WORK PROPERLY AND CAUSE ME TO PULL VEHCILE TO ONE SIDE CAUSING ME TO CRASH SAW LIFE FLASH BEFORE EYES . THANKFUL TO BE ALIVE , COMES TO FIND OUT THERE WAS A RECALL ON IT

Mileage: 67,000

ALMOST COLLIDED WITH OTHER CARS IN PARKING LOT BECAUSE THE BRAKES WEREN'T WORKING RIGHT ALSO TRANSMISSION SHIMMIES BETWEEN 50 AND 60 MPH

Mileage: 39,000

FELT STRANGE BRAKE PULSE TURNED INTO PARKING LOT AND POWER BRAKING FAILED. BARELY GOT TRUCK STOPPED BEFORE HITTING ANOTHER CAR. TRUCK HAD TO BE TOWED TO DEALERSHIP

Mileage: 67,171

WHEN I GOING IN REVERSE THE PEDAL BRAKE DOENST WORK

MY TRUCK BRAKING SYSTEM IS GOING TO THE FLOOR BOARD OF MY TRUCK. MAKING VERY HARD FOR ME TO STOP. THEY CALL THEMSELVES FIXING IT BUT THE SAME PROBLEM IS BACK. REALLY TIRED OF THIS PROBLEM AND OTHER SPEND 1000.00 ON SPRINGS AND THE VEHICLE WAS ONLY A 1 1/2 OLD WAS TOLD THE WARRANTY ON COVER IT IF THEY WERE BROKEN A LIE THE DEALERSHIP TOLD ME.

OUR TRUCK IS LESS THAN THREE YEARS OLD WITH APPROXIMATELY 69000 MILES. THE TRANSMISSION JUST STARTED SLIPPING OUT OF THE BLUE WHILE DRIVING THRU A NEIGHBORHOOD. WHILE IN DRIVE IT WOULD MOVE BUT ONCE ACCELERATING IT WOULD REV UP AND NOT CHANGE GEARS. THIS HAPPENED WITHOUT WARNING, WITHOUT AN ENGINE OR WARNING LIGHT. WE DO ALL THE NECESSARY REGULAR MAINTENANCE. IN ADDITION TWO YEARS AGO WHILE THE TRUCK WAS A YEAR OLD, THE BRAKES WENT OUT WHILE DRIVING ON THE INTERSTATE. I GUESS IT WAS THE BRAKE VACUUM PUMP OR WHATEVER THAT DIDN'T ALLOW THE BRAKE PEDDLE TO BE PRESSED WHICH PROVIDED ME WITH NO BRAKES. AGAIN WITH ABSOLUTELY NO WARNING! THIS LATER BECAME RECALL ISSUE BUT NOT BEFORE IT HAD ALREADY HAPPENED TO ME! I UNDERSTAND THERE IS A CLASS ACTION LAW SUIT AGAINST GMC FOR TRANSMISSION PROBLEMS AND I WOULD CONSIDER BEING A PART OF THIS. THIS IS A 50;000$ AND RELATIVELY NEW TRUCK, THIS IS UNACCEPTABLE! THE DEALER NOW WANTS OVER 4000$ FOR REPAIRS. *TR

Mileage: 69,000

I OWN TWO GMC SIERRA TRUCKS YEARS 2014 AND 2017 BOTH TRUCKS HAVE SEVERE LOCK UP ISSUES. I HAVE GONE TO THE DEALERSHIP NUMEROUS TIMES AND THEY RESET THE COMPUTER BUT THE BRAKES STILL LOCK UP. THIS IS AN EXTREME SAFETY HAZARD, AND MY WIFE AND I ARE EXTREMELY SCARED THAT WE WILL BE IN A FATAL ACCIDENT. THERE HAS BEEN SEVERAL TIMES WHERE WE HAVE ALMOST HIT A CAR OR PERSON WALKING. I AM REALLY CONCERNED THAT THESE VEHICLES WILL CAUSE AN ACCIDENT. MY CHILDREN ARE ALWAYS IN MY TRUCKS END IT IS EXTREMELY SCARY WHEN EVERY TIME I HIT THE BRAKES I AM NOT SURE IF IT WILL STOP OR NOT. THIS IS AN IMPERATIVE MATTER. *TR

Mileage: 60,000

TL* THE CONTACT OWNED 2017 GMC SIERRA LD. THE CONTACT STATED THE VEHICLE WAS SERVICED FOR NHTSA CAMPAIGN NUMBER: 19V645000 (SERVICE BRAKES, HYDRAULIC) AT LOCAL DEALER DON JOHNSON MOTORS CHEVROLET BUICK GMC (734 WEST AVE, RICE LAKE, WI 54868), HOWEVER, THE FAILURE REOCCURRED. THE CONTACT STATED WHILE DRIVING 70 MPH TRAFFIC HAS STOPPED. THE BRAKE PEDAL WAS DEPRESSED HOWEVER THE VEHICLE FAILED TO STOP,CAUSING THE VEHICLE TO HIT ANOTHER VEHICLE AND GUARDRAIL.THE CONTACT STATED THAT THE AIR BAGS DEPLOYED. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO A TOW ARD, AFTER ELEVEN DAYS IT WAS TOWED TO LOCAL DEALER PALM CHEVROLET (2300 SW COLLEGE RD, OCALA, FL 34471) WHERE IT WAS DIAGNOSED THAT THE VACUUM PUMP, SENOR ,AND A BELT NEEDED TO BE REPLACED.THE VEHICLE HAD NOT BEEN REPAIRED AS OF YET. THE CONTACT STATED THE VEHICLE WAS TRADED FOR A 2018 CHEVY IMPALA.THE MANUFACTURER HAD BEEN INFORMED OF THE FAILURE AND A CASE WAS OPENED. THE FAILURE MILEAGE WAS APPROXIMATELY 38,000. *BF *AS

Mileage: 38,968

TL* THE CONTACT OWNS A 2017 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING ABOUT 50 MPH, INCREASED BRAKING EFFORT WAS REQUIRED IN ORDER TO STOP THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DOW LEWIS MOTORS DEALER (530-763-2923, LOCATED AT 2913 COLUSA HWY, YUBA CITY, CA 95993) WHERE IT WAS INFORMED OF NHTSA CAMPAIGN NUMBER: 19V645000 (SERVICE BRAKES, HYDRAULIC) HOWEVER, IT WAS CONFIRMED THAT THE PARTS WERE NOT AVAILABLE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND WAS NOT ABLE TO CONFIRM WHEN THE PARTS WERE TO BECOME AVAILABLE. THE CONTACT WAS NOT PROVIDED A LOANER VEHICLE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 60,000. THE VIN WAS NOT PROVIDED.

Mileage: 60,000

TL* THE CONTACT OWNS A 2017 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 20 MPH, THE BRAKE PEDAL WAS DEPRESSED AND TRAVELED TO THE FLOORBOARD. THE BRAKES FAILED TO ADEQUATELY SLOW DOWN THE VEHICLE. PRIOR TO THE FAILURE, THE VEHICLE WAS TAKEN TO MASTRIA BUICK GMC (1525 NEW STATE HWY, RAYNHAM, MA 02767, (508) 880-7000) TO BE REPAIRED PER NHTSA CAMPAIGN NUMBER: 19V645000 (SERVICE BRAKES, HYDRAULIC). THE CONTACT STATED THAT THE FAILURE RECURRED TWICE AFTER THE REPAIR. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURES. THE APPROXIMATE FAILURE MILEAGE WAS 40,000. *BF *TR

Mileage: 40,000

LOST BRAKE ASSIST. COMING TO A STOP THE BRAKE PEDAL WHET TO THE FLOOR AND THE ANTI LOCK BRAKES STARTED CHATTERING. THE BRAKE PEDAL WAS HARD AS A ROCK AND TOOK 2 FEET TO STOP. I WAS ON A 170 MILE TRIP AND ALMOST HIT SOMEONE 2 TIMES.

Mileage: 23,000

ORIGINAL ISSUE: BRAKE PEDAL HARD TO PUSH AND TRUCK DID NOT STOP NORMALLY AT LOW SPEEDS. COULD REPRODUCE ISSUE USUALLY PULLING INTO A PARKING SPOT. MY VEHICLE WOULD HAVE HIT CAR IN FRONT OF ME IF I HADN'T USED EBRAKE. TOOK TO DEALER, DEALER APPLIED SOFTWARE UPDATE TO BRAKING SYSTEM. UPON PICKUP I DISCOVERED THE ORIGINAL ISSUE PERSISTED AND NOW HAD AN ADDITIONAL ISSUE. NOW AT ALMOST EVERY BRAKE EVENT, THE ABS WOULD ENGAGE AND CAUSE THE BRAKE PETAL TO CHATTER/VIBRATE. DEALER AND GM CUSTOMER SERVICE TRIED TO TELL ME THAT WAS NORMAL AFTER THE RECALL UPDATE. I TOLD THEM THAT COULDN'T BE NORMAL. IT WASN'T HAPPENING BEFORE. AFTER NOT EXCEPTING THAT AS A FIX, THE DEALERSHIP STARTED LOOKING FOR OTHER POSSIBILITY'S. AFTER TELLING THE DEALER I WAS GOING TO TAKE THE TRUCK SOMEWHERE ELSE THEY DECIDED TO REPLACE THE VACUUM PUMP. THE NEW VACUUM PUMP FIXED BOTH ISSUES! I'M JUST SAYING IF THE RECALL UPDATE IS CAUSING MORE PROBLEMS THEN WHAT IT WAS INTENDED TO FIX. NOW THERE COULD BE A MORE SERIOUS PROBLEM ON THE HIGHWAY. PLEASE LOOK INTO THESE ISSUES. I FEEL LIKE GM IS TRYING TO HIDE A BIG PROBLEM.

Mileage: 32,900

I HAS SOME ISSUES WITH MY BRAKES WHEN STOPPING AT A RED LIGHT. I STEPPED ON THE BRAKES AND KEPT ROLLING FORWARD AND ALMOST HIT THE TRUCK IN FRONT OF ME. I THOUGHT IT COULD BE MY PADS WORN DOWN SO I DROVE CAUTIOUSLY FOR A FEW DAYS. I GOT A CALL A FEW DAYS LATER FROM THE DEALERSHIP WHERE I BROUGHT THE TRUCK FROM SAYING MY ON STAR NOTIFIED THEM OF A RECALL ON MY TRUCK PERTAINING TO THE BRAKES. I THOUGHT GOOD THIS COULD FIX THE PROBLEM. I TOOK IT BY THE DEALER AND THEY SAID IT WAS A SOFTWARE UPDATE, AND THEY DID THE UPDATE. I ALSO ASKED THEM TO TAKE A LOOK AT THE BREAK PADS SO I COULD RULE IT OUT OR DO SOMETHING ABOUT IT. THEY SAID I HAVE 60% OF MY BRAKE PADS STILL LEFT. THE NEXT DAY I WAS GOING TO WORK AND I GOT TO THE PARKING GARAGE WHERE I WORK AND NOTICED IT WAS DOING IT AGAIN. I PRESSED DOWN ON THE BRAKES TO BACK UP AND I KEPT ROLLING FORWARD AND HAD TO PRESS DOWN HARD AND TO THE FLOOR SO I COULD STOP. SO FAR THERE WAS NOT A CRASH BUT I FEEL ITS ONLY A MATTER OF TIME. THIS IS A MAJOR SAFETY ISSUE FOR ME AND MY FAMILY AND FEEL THERE SHOULD BE SOME SORT OF RECALL TO FIX THIS.

Mileage: 57,000

A FEW TIMES MY BRAKES WHILE GOING SLOW WOULD GET VERY TIGHT AND NOT WORK. WELL TODAY AFTER CHURCH I WAS LEAVING THE PARKING LOT. AS THE CAR IN FRONT OF ME MOVED FORWARD, SO DID I. WHEN I TRIED TO STOP I COULDNT. MY BRAKES GOT HARD AND WENT TO THE FLOOR AND I RAN RIGHT INTO THE CAR IN FRONT OF ME

Mileage: 30,300

ANTI-COLLISION SYSTEM IS ACTIVATED, I APPLY BREAKS, BREAK PEDDLE IS SOFT AND GOES TO THE FLOOR, I SWERVE TO AVOID COLLISION AND QUICKLY PUMP THE BREAKS TO REGAIN PEDDLE AND APPLY BREAKS AGAIN (THIS TIME BRAKES ENGAGE). 6 DIFFERENT TIMES THIS HAS HAPPENED. 4 TIMES ON THE INTERSTATE DURING RUSH HOUR AND TWICE ON A HIGHWAY. CAR IN FRONT OF ME SLAMMED ON THE BREAKS CAUSE THE SYSTEM TO ACTIVATE AND ME TO REACT. IT APPEARS THE SYSTEM OVERRIDES THE BRAKES TAKING CONTROL AWAY FROM ME. HOWEVER, THE SYSTEM DOES NOT BRAKE THE VEHICLE. ANOTHER OCCUR WAS WHEN I WAS LAUNCHING MY BOAT INTO THE LAKE. I WAS BACKING UP AND LOST BRAKE PRESSURE AND HAD TO APPLY MY EMERGENCY PARKING BRAKE TO STOP MY TRUCK FROM GOING INTO THE WATER. THIS VEHICLE HAS BEEN CHECKED BY 2 DIFFERENT DEALERS, 4 DIFFERENT TIMES IN THE PAST YEAR. I DO NOT FEEL SAFE DRIVING THIS VEHICLE. THE DATE LISTED BELOW WAS THE LAST OCCURRENCE WHEN THIS HAPPENED. (NOT THE PRIOR 5 OCCURRENCES)

Mileage: 26,000

TOTAL BRAKE FAILURE. THE PEDAL BECAME HARD AS A ROCK WITH NO ADVANCE WARNING. I RECEIVED A NOTICE (N182202780) FROM GM STATING THAT I MIGHT EXPERIENCE INCREASED BRAKE PEDAL EFFORT. IT WENT ON TO SAY HOW THIS NOTICE "IS NOT A REACALL" AND THAT BRAKES STILL MEETS "ALL FEDERAL MOTOR VEHICLE SAFETY STANDARDS FOR BRAKE PERFORMANCE" I'M WRITING TO BRING ATTENTION TO THE FACT THAT MY TRUCK EXPERIENCED NO SYMPTOMS OF A PROBLEM UNTIL THE PEDAL HAD MAYBE 10% ASSIST. NO CHECK ENGINE LIGHT OR NOTICE FROM THE DRIVERS INFO CENTER. I APPLIED THE BRAKE, SHIFTED INTO DRIVE, ACCELERATED THEN APPLIED THE BRAKE TO STOP AND MAYBE HAD 10% BRAKING ABILITY. THE NOTICE ALSO WENT ON TO SAY THAT "FAILURE TO FOLLOW RECOMMENDED OIL CHANGE INTERVALS COULD CONTRIBUTE TO THIS CONDITION". THE TRUCK HAS 32000 MILES ON IT, I'VE OWNED IT SINCE NEW, I HAVE ALWAYS CHANGES OIL WITH 20% LIFE LEFT IN IT. THIS IS ABOUT 2000 MILE SOONER THAN THE MANUFACTURER RECOMMENDS. THIS IS A VERY SERIOUS CONDITION THAT GM HAS RECOGNIZED IN THERE LETTER, BUT IN MY OPINION, ARE NOT TAKING IT SERIOUS ENOUGH. UNLESS I'M A "ONE OFF" CASE, THIS WILL VERY LIKELY GET PEOPLE HURT AND PROPERTY DAMAGE IF NOT ADDRESSED VERY SOON. PLEASE LOOK INTO THIS, THANK YOU

Mileage: 32,000

STOPPED AT A STOPLIGHT, NO PROBLEM. AFTER A FEW SECONDS TRUCK STARTED TO ROLL FORWARD. HAD TO APPLY TREMENDOUS PRESSURE ON BRAKE TO STOP VEHICLE. PROBLEM CONTINUED UNTIL I WAS ARRIVED AT DESTINATION A QUARTER MILE AWAY. OCCURRED SEVERAL MORE TIMES. CUT VEHICLE OFF AND WHEN RESTARTED IT OCCURRED ONCE AND THEN RETURNED TO NORMAL OPERATION.

TL* THE CONTACT OWNS A 2017 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE ATTEMPTING TO BRAKE, THE BRAKE PEDAL WAS STIFF AND VERY DIFFICULT TO DEPRESS. THE CONTACT MENTIONED THAT THE ABS IN THE BRAKES WAS VIBRATING. THE VEHICLE WAS NOT TAKEN TO A DEALER OR INDEPENDENT MECHANIC FOR DIAGNOSIS OR REPAIRS. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 32,000.

Mileage: 32,000

VACUUM PUMP, BRAKE PEDAL STIFF WHEN REVERSING, HARD TO STOP.

Mileage: 30,000

THE BRAKE PEDAL BECOMES EXTREMELY STIFF WHEN TRYING TO STOP AT SLOW SPEEDS, ESPECIALLY IN PARKING LOTS. THE VEHICLE BECOMES VERY DIFFICULT TO STOP ALMOST CAUSING CRASHES. GM DEALERSHIP REPEATEDLY TESTS VEHICLE AND TRIES TO CLAIM THERE IS NOTHING WRONG AND I'M MAKING A MISTAKE. HAD TO TAKE VEHICLE IN SEVERAL TIMES AND EVENTUALLY THEY FOUND A FAILED VACUUM PUMP. THEY TRIED TO MAKE ME PAY $700+ FOR THE REPAIR EVEN THOUGH ITS A KNOWN ISSUE. THEY ARE TRYING TO AVOID DOING A RECALL AND PUTTING THEIR BOTTOM LINE AHEAD OF SAFETY. THESE TRUCKS ARE DANGEROUS.

Mileage: 30,000

THE BRAKES ARE NOT WORKING AT SLOW SPEEDS. I WAS PARKING IN A PARKING GARAGE WHILE PULLING UP TO THE CONCRETE WALL AND PUSHING ON THE BRAKE THE TRUCK ALMOST DIDN'T STOP AND THE PEDAL GOT VERY STIFF. WHILE DRIVING HOME IN TRAFFIC THE TRUCK DID THE SAME THING AND I ALMOST HIT THE CAR IN FRONT OF ME. IT SEEMS TO BE AT SLOWER SPEEDS AND THE BRAKES ARE LOSING ALL POWER. THE TRUCK IS ONLY 2 YEARS OLD AND NORMALLY STOPS ON A DIME. TOOK TO THE DEALER TODAY, AND THEY SAID THE VACUUM PUMP IS BAD AT ONLY 39,000 MILES.

Mileage: 38,850

FAULTY BRAKE VACUUM PUMP LEADING TO REDUCED BRAKING FORCE UNDER REPEATED USE OR IN A PANNIC SITUATION LEADING TO A COLLISION. I HIT A DEER BECAUSE I WAS UNABLE STOP OR SUFFICIENTLY SLOW DOWN TO AVOID HITTING IT. I NOTICED REDUCED BRAKING FORCE AND A HARD BRAKE PEDAL. I HAVE READ OF SEVERAL REPORTS ON THE INTERNET INVOLVING THIS ISSUE

Mileage: 50,000

BREAKS HAVE OUT AT 36.5K MILES. VACUUM TO BREAK LINE MESSED UP. WAS IN BUSY TRAFFIC GOING 50-60MPH. TRAFFIC SLOWED DOWN BUT TRUCK WOULD NOT BREAK. VERY VERY SCARY SITUATION. GMC DEALERSHIP KNEW EXACTLY WHAT THE ISSUE WAS OVER THE PHONE. TOOK IT TO THEM AND CAR WAS OUT OF WARRANTY BY 500 MILES. 800$ OUT OF POCKET AND TOOK THEM 10 SECONDS TO IDENTIFY ONCE THE VEHICLE WAS AT THE DEALERSHIP. SEEMS LIKE THEY KNOW THE ISSUE VERY WELL

Mileage: 36,500

I HAD THE ROTORS REPLACED ON MY NEW TRUCK AT 6000 MILES AND PAID FOR REPAIRS OUT OF POCKET. I CONTINUED TO HEAR BRAKE NOISE. ON MY WAY TO THE DEALERSHIP ON THE WEEKEND I WAS SCHEDULED TO HAVE THE BRAKE NOISE INVESTIGATED AND TO HAVE AN OIL CHANGE DONE, I HAD CATASTROPHIC BRAKE FAILURE. A VEHICLE IN FRONT OF ME MADE A LANE CHANGE INTO MY LANE AND THEN SLAMMED ON THE BRAKES IN FRONT OF MY VEHICLE AT A GREEN LIGHT COMING TO A COMPLETE STOP FROM 40 MPH TO 0 IN THE MIDDLE OF THE INTERSECTION. A CAR HAD PULLED OUT IN FRONT OF HIM CHANGING LANES FROM THE LEFT LANE TO RIGHT. I MASHED THE BRAKE PEDAL TO STOP IMMEDIATELY AND MY BRAKES WENT SOFT AND TO THE FLOOR ON THE SECOND PUSH. WHEN I WASN'T STOPPING. I SLAMMED MY EMERGENCY BRAKE WITH MY LEFT FOOT AND INJURED A FEW TOES ON MY LEFT FOOT TRYING TO STOP BEFORE MY VEHICLE. MY VEHICLE DID NOT COME TO A COMPLETE STOP. INSTEAD, MY VEHICLE SKIDDED AND LIGHTLY TAPPED THE VEHICLE IN FRONT OF ME DOING MINOR BUMPER DAMAGE TO BOTH OF OUR VEHICLES. HOWEVER THERE WAS A TOYOTA TRUCK BEHIND ME, AND STRUCK MY VEHICLE DIRECTLY WHILE I WAS AT A STAND STILL, WHILE THE DRIVER WAS DOING OVER 70 MPH WHEN HE COLLIDED WITH MY SIERRA. MY SIERRA HAS THE PIN OR PART OF THE CALIPER THAT MOVES THE BRAKE PADS, COMPLETELY PUSHED THE PISTON INTO THE ROTOR. THE VEHICLE HAS HAD BRAKE ISSUES SINCE I PAID TO HAVE THE BRAKES AND ROTORS REPLACED AT 6000 MILES. I HAVE RECORDS OF THE INCIDENT AND THE BRAKE FAILURE FROM A MECHANIC AND AUTO BODY SHOP DOCUMENTING THE COMPLETE FAILURE OF THE BRAKES. DIRECTLY AFTER THE BRAKES WERE REPLACED WITHIN ANOTHER 8000 MILES THE BRAKE BOOSTER ON THE VEHICLE WENT BAD AND WAS REPLACED AS WELL.

Mileage: 20,000

'TAKATA RECALL' DRIVING THE TRUCK TO THE STORE, WHEN I WAS PARKING THE BRAKE PEDAL GOT EXTREMELY HARD, LOST ALL BRAKE FUNCTIONS. IMMEDIATELY TOOK THE TRUCK (2017 GMC SIERRA 1500) TO THE DEALERSHIP THEY TOLD ME IT WAS THE VACUUM PUMP AND BELT. HAD IT REPLACED UNDER THE WARRANTY ON NO ADDITIONAL COST.

Mileage: 36,000

AFTER EXITING I285 NORTH OF ATLANTA ONTO THE ASHFORD DUNWOODY EXIT, MY BREAKS STOPPED WORKING AND THE PEDAL WOULD NOT PRESS DOWN. I WAS IN MOTION AT THE TIME AND HAPPENED TO BE MOVING UP AN INCLINE. I HAD TO DOWN SHIFT FROM DRIVE INTO A LOWER GEAR AND USE THE EMERGENCY BREAK TO AVOID A COLLISION WITH THE CAR IN FRONT OF ME.

Mileage: 45,000

VACUUM PUMP ISSUE WITH GMC SIERRA - I NOTICED A PROBLEM BRAKING MY PICKUP, SPONGY BRAKES, HARD STOPPING. I TOOK IT TO MY LOCAL CHEVY DEALER (PORTSMOUTH CHEVROLET, PORTSMOUTH, NH). THEY DIAGNOSED IT AS A PROBLEM WITH THE VACUUM PUMP AND REPLACED THE PUMP UNDER WARRANTY. I WANTED TO ALERT YOU BECAUSE I SAW A NOTICE ON FOX NEWS THIS EVENING ABOUT YOUR INVESTIGATION OF THE PROBLEM WITH EARLIER MODELS AND WANTED TO ALERT YOU THAT MINE IS A 2017. YOU MAY WANT TO EXPAND THE INVESTIGATION TO INCLUDE LATER MODEL TRUCKS AND SUVS. LUCKILY I CAUGHT IT IN TIME, NO ACCIDENTS, NO INJURIES.

Mileage: 29,650

VEHICLE HAS HARD SHIFT AT 5-6 MPH. DEALER STATED COULD NOT FIND ISSUE, AND REFLASHED TCM.APPROX MONTH LATER, AT 10K MILES, TRUCK HARD SHIFTED FROM RED LIGHT ON HIGHWAY, ONCE UP TO 45 MPH, SHUTDOWN. STEERING WHEEL LOCKED UP, NO BRAKES, NO CONTROL OF VEHICLE AT 45-50 MPH.DEALER KEPT FOR ONE WEEK, STATED LOOSE CABLE ON STARTER FROM BATTERY. EXACTLY 1K MILES LATER (5 WEEKS), NOW AT 11K MILES, TRUCK HARD SHIFTED AT 5-6MPH, AND AT 45-50 MPH TRUCK TRIED TO SHIFT IN 4WD. ALL LIGHTS ON DASH CAME ON AS A RESULT. DEALER HAS CURRENTLY HAD THE TRUCK FOR TWO WEEKS AND CAN NOT FIND ISSUE. THEY SUPPOSEDLY CONSULTED GM, AND INSTEAD OF SENDING AN EXPERT TECH TO HELP DEALER FIND ISSUE, ADVISED DEALER TO REPLACE ECM. REPLACING ECM IS THE GENERAL ANSWER TO NOT SURE WHAT IS WRONG. THIS TRUCK IS A SAFETY ISSUE, AS WHEN IT SHUTS OFF GOING 45-50 MPH THERE IS NO CONTROL OR BRAKES OPERATIONAL ON THE VEHICLE. GM WILL REPLACE THE ECM, AND JUST LIKE RIGHT NOW, WILL NOT BE ABLE TO REPLICATE THE PROBLEM, AND EXPECT ME AS THE CONSUMER TO TAKE DELIVERY BACK OF THE VEHICLE. CURRENTLY ALL OF MY DOCUMENTATION IS IN THE DASH OF THIS TRUCK, AT THE DEALERSHIP. TRYING TO DETERMINE HOW MYSELF AS THE CONSUMER CAN HELP ENSURE THIS SAFETY ISSUE IS CORRECTED, AND NOT PASSED ON.

Mileage: 11,000

WAS STOPPED AT STOP LIGHT,WITH FOOT ON THE BRAKE. STARTED ROLLING FORWARD AND HAD TO PRESS HARDER ON THE BRAKE. WHEN HOLDING FOOT ON BRAKE PEDAL AND IN GEAR PEDAL SLOWLY MOVES DOWN TO THE FLOOR. TOOK VEHICLE TO DEALER WHO WAS LUCKILY CLOSE BY. THEY TESTED TRUCK BRAKE'S AND FOUND THE SAME THING. THEY KEPT TRUCK, AND REPAIRED THE NEXT DAY. MASTER CYLINDER WAS BAD. THEY BELIEVE THAT A SEAL MAY HAVE A CRACK,OR A NICK IN IT, ALLOWING PRESSURE TO RELEASE. THE DEALER SAID MORE THAN LIKELY GM WILL ASK FOR PART TO EXAMINE IT, SO THEY CAN'T TAKE IT APART. TRUCK HAD 3173 MILE'S ON IT.

Mileage: 3,173