2015 GMC YUKON XL Service Brakes Problems

Service Box appears indicating - "Trailer Brake System" with a loud BING, BING, BING Alert sound. It continues every few minutes... Please note: we aren't using a trailer... I have googled/youtube it and found that this is an issue with many owners. They indicate that the wire harness in between two of the body control modules is defective. It is known to have faulty wire connection. This is intermittent, goes for months and stops for months, and then starts up again. Starting the vehicle, while driving slow or fast, it doesn't matter.

I purchased a 2015 GMC Yukon in March 2024 I drive the vehicle 9 mons, 7500 miles the vehicle has been in service at my local dealership since Dec 13, 2024, for engine and transmission replacement, I have had the vehicle back 3 weeks not the warning light and service warning chime for the "Service Trailer Brake System is on, I have not ever use a trailer with the vehicle, I was told the vehicle needs a wire harness, I have read this a problem in these vehicles that has not been addressed GMC with a recall, I have put A LOT of money in the vehicle. This is an well documented failure in the trailer brake system that GM should repair at no cost to the consumer

Brake vacuum pump faulty again.

This is a complaint for my vehicle Gmc2015 Yukon. My Truck brake system(vacuum pump is defective). my large truck is a safety hazard on highway and street . when i attempted to park while depressing my brake pedal it instantly before very hard to press to stop my truck. i have to apply lot of force to my foot inorder to stop vehicle. my mechanic inspected vehicle and it show a bad (defective vacuum pump) . base on former complaints about this same problem (2019 NHSTA campaign number 19v645000 ) it show and state the exact problem with my vehicle. this problem started early last year. Also, when driving on highway and slows down,the brake vacuum pump and brake pedal locks up (very difficult to stop something). this happens intermitting times. very scary trying to stop from crashing into cars in front of me sometime.

There has always been break problems with this vehicle. Some recalls have been done. Now there is a new problem, I took it to the dealership. There is a special coverage to fix this issue. GM denied to fix it because the special coverage expired on 06/06/2024. But the vehicle is under the miles and the problem just started.

My power vacuum brakes system is not properly working. In order to stop truck I must depress brake pedal very hard just to stop truck. Crunching noise every time. Made several trip to mechanic . I changed many part ( brakes) rotors , still and brake vacuum sensor ( purchase from gmc dealer . Still have this problem. Mechanic states, need new vacuum pump. Very dangerous to drive. Very difficult to stop . Please investigate this VIN for common complaints.

Defective wire harness between 2 body control modules, causing alarm to go off repeatedly "Service Trailer Brake System" and also "Stabilitrack" will come on randomly and lock my brakes up and all of the features in my dash. This has been very scary to drive and has brought the vehicle close to collision more than a handful of times now.

I keep getting a warning on my display on dash about my trailer brake system is not working. Also my temperature gauge stops working and I have to take off negative cable on battery to reset it. Temperature control sensor has been replaced but the problem still continues to happen.

On several occasions, have noticed the brakes failed to operate properly when vehicle is at low speed. The pedal becomes extremely hard to push and there is almost no braking power. This has occurred in stop and go traffic and nearly caused an accident.

Trailer brake service malfunction

This vehicle was purchased on 7/05/2019 with miles 52,000 and the TRAILER BREAKE SYSTEM has gone bad 2 times already and I haven’t never used the trailer hook for anything is just so expensive to fixed it and goes bad again and all part we’re purchased from the dealership even the dealer said is a manufacturer error and this will keep happening because is manufacturer error was not designed correctly as a consumer I feel that I shouldn’t be paying for their mistake GMC should do recall and get this issue fixed as soon as possible and fixed it 2 times I have been at the dealership to get this issue fixed and I’ll probably be back again to get fixed and like mentioned is not cheap to fixed please do something about this matter I’ll gladly appreciate

My vehicle Has a Service Trailer Brake System notification in my dash that dings as well. It does it on cold mornings with no trailer attached. I don’t trailer often.

Trailer assist error. Brakes not working. Ac compressors been replaced and the fan runs after the vehicles off and ac only blows warm air

brake pedal takes much more effort to push I was parking the car and thankfully was only going about 2 mph because I had to press the brakes with two feet to stop it from hitting the car in front of me. We just arrived from a 2 hour trip and this happened at the end of our trip. Lucky it wasn’t on the highway or with a pedestrian in front of me. No injuries

The service brake assist warning message keeps appearing. Additionally, when the vehicle is completely stopped, but then you let off the brake to roll forward a little bit (such as at a stoplight), when you press the brake again it does not have stopping power. Must pump the brake several times as the vehicle rolls. This is particularly dangerous in downhill stops. It appears there is a safety recall on the power assist vacuum for brakes on 2015 GMC Yukon XL, but for some reason, my VIN is not included in the recall. I would like to know what it would take to include my VIN in the recall because it is the same year, make, and model.

Brake Assist Light came on. Pierre brakes failed and had to press down hard manually to get the car to stop. Felt antilock breaks were assisting. We felt very unsafe. It’s very scary.

Rear LED taillight assembly. Connection is faulty and they illuminate sometimes and other times they do not.

I was dropping my daughter off at school in the car line. I was at low speed trying to brake and with the brake all the way down couldn't stop immediately. I was able to stop but then went to go again and when tried to stop again, couldn't and hit the car in front of me. It was making a sound while trying to brake but wouldn't engage my brakes. Luckily it didn't leave any damage and the other driver said it was OK and accepted my apology as my brakes were not working correctly.

Driver side brake lights don't work again. This will be the 3rd time that I know of that this piece of equipment has been changed out.

LED Brake Lights fail due to design error typically on both side of the vehicle. I have found multiple reports of a failure on a circuit board that was poorly designed. A copper tracing is very narrow and fractures due to vibration resulting in Brake Light failure. Because the entire module must be replaced the repair costs $800-$900 per side.

ISSUE WHEN BRAKING. LOTS OF FORCE NEEDED AT TIMES TO STOP.SEEMS TO OCCUR MORE AT SLOWER SPEEDS.

Mileage: 100,000

THE BRAKES FAILED IN MY CAR CAUSING A REAR COLLISION WITH AN OBJECT IN MY DRIVEWAY. AFTER INSPECTION FROM A CERTIFIED GMC DEALERSHIP, THE BRAKE FAILURE WAS NOT CAUSED BY SERVICE NEGLECT OR AGE OF BRAKES, IT WAS DUE TO THE VACCUM PUMP FAILURE TO PROVIDE PRESSURE. THIS IS THE SECOND TIME IN TWO YEARS THIS PART HAS CAUSED MY BRAKES TO FAIL. THE DEALERSHIP REPLACED THE PART AT NO COST THOUGH THERE IS NOT FORMAL RECALL ON THIS PART. BOTH TIMES THIS PART FAILED THE CAR WAS IN MOTION. THE FIRST TIME IT WAS TOWED OUT OF A CITY TO BE REPAIRED AS IT WAS DANGERSOUS TO DRIVE AND THE SECOND TIME THE FAILURE CAUSED THE VEHICLE TO COLLIDE WITH A LARGE DUMPSTER IN MY DRIVEWAY CAUSING EXTENSIVE DAMAGE TO THE REAR PASSENGER SIDE OF THE CAR. THANKFULLY THERE WAS NOT PHYSICAL DAMAGE TO ANY PERSONS IN EITHER OF THESE TWO INCIDENTS WHICH BOTH WERE NO FAULT OF THE DRIVER OR OWNER OF THE CAR.

Mileage: 136,000

THE BRAKES ON MY 2015 GMC YUKON SUDDENLY BECAME EXTREMELY DIFFICULT TO OPERATE WITH VERY HARD BRAKE PEDAL AND INCREASED STOPPING DISTANCE. I WAS ABLE TO BRING THE VEHICLE TO THE DEALER FOR SERVICE. THEY INFORMED ME THAT THERE WAS NO OUTPUT FROM THE ENGINE VACUUM PUMP TO THE BRAKE BOOSTER AND IT WOULD BE ADDRESSED UNDER A SPECIAL COVERAGE WARRANTY FROM GM REPAIRED. HOWEVER, AFTER FIXING THE COVERED PART OF THE VACUUM PUMP ASSEMBLY, THEY INDICATED THAT THE PROBLEM WAS STILL PREVALENT AND DETERMINED THEY ALSO NEEDED TO REPLACE THE BRAKE BOOSTER THAT WAS ALSO AT FAULT. THE BRAKE BOOSTER WAS NOT COVERED UNDER THE SPECIAL COVERAGE AND RESULTED IN A SIGNIFICANT CHARGE. IT SEEMS THAT THE BRAKING SYSTEM ISSUES ARE RELATED AND NEEDS TO BE LOOKED INTO FURTHER.

Mileage: 107,000

2015 REAR BRAKE LIGHTS WORK INTERMITTENTLY AND NEED TO BE REPLACED OR REPAIRED. GMC KNOW THERE ARE NUMEROUS COMPLAINTS ABOUT THIS PROBLEM AND HAVE DONE NOTHING. HUGE SAFETY ISSUE!!

Mileage: 52,000

MAJOR SAFETY ISSUES WITH THIS VEHICLE. ANOTHER 2015 YUKON WITH NO TAIL OR STOP LIGHTS. I'M OVER MILLAGE ON SPECIAL RECALL. THERE SHOULD BE NO TIME/MILLAGE ISSUE ON THIS. SEAT BELTS LOCK UP. BRAKES ARE EITHER GOOD OR MUSSY WHENEVER THEY WANT TO BE. HARD TO STOP THE VEHICLE. ALSO WHEN I FIRST PURCHASED THE VEHICLE IT WOULD COMPLETELY DIE (NO LIGHTS MOTOR DIED, NO POWER STEERING, NO AIR BAGS, NO RADIO NOTHING AT ALL ON THE X-WAY AT 70 MPH) AND THE DEALER COULD NOT REPAIR IT! RUST ON FRAME RAILS. (AND MORE).

Mileage: 72,000

MY PASSENGER SIDE TAIL LIGHT ASSEMBLY NEED TO BE REPLACED AS THE BRAKE LIGHTS ARE NOT WORKING. THIS HAS BECOME A COMMON PROBLEM AS EVIDENCED BY THE NUMBER OF COMPLAINTS FILED ON YOUR SITE FOR THE SAME ISSUE. LACK OF PROPERLY FUNCTIONING TAIL LIGHTS IS A MAJOR SAFETY CONCERN AND A RECALL SHOULD BE ISSUED. *TR

TL* THE CONTACT OWNS A 2015 GMC YUKON XL. THE CONTACT STATED THAT WHILE DEPRESSING THE BRAKE PEDAL THE REAR BRAKE TAILLIGHTS FAILED TO ILLUMINATE. THE VEHICLE WAS TAKEN TO KEWEENAW BUICK GMC LOCATED AT 608 QUINCY ST, HANCOCK, MI 49930, TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE REAR BRAKE LIGHTS WERE DEFECTIVE AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE, BUT PROVIDED NO ASSISTANCE. THE FAILURE MILEAGE WAS 102,000.

Mileage: 102,000

BOTH LED BRAKE LIGHTS STOPPED WORKING. THEY WERE BOTH REPLACED BY THE DEALERSHIP. NOW APPROXIMATELY 7 MONTHS LATER THE PASSENGER BRAKE LIGHT HAS STOPPED WORKING AGAIN. THIS IS A VERY EXPENSIVE PART, WHICH COST $700.00 EACH SIDE, AND HAS FAILED TWICE IN YEAR. FROM A SIMPLE SEARCH ON THE INTERNET THIS SEEMS TO BE A VERY COMMON PROBLEM FOR GMC YUKON'S AND DENALI'S BUT THERE IS NOT A RECALL FOR THIS FAILURE. THE PROBLEM SEEMS TO BE A FAULTY DESIGN. THE SOLDER CONNECTION PREMATURELY BREAKS AND CAUSES THE LED BRAKE LIGHTS TO NOT WORK. *TR

Mileage: 63,000

THE BRAKE LIGHT IS NOT WORKING. ALL OTHER FUNCTIONS IN THE ASSEMBLY ARE FINE. REVERSE AND TURN SIGNAL, NO BRAKE INDICATION. IT DOES NOT ACTIVATE A WARNING ON THE DASH FOR THE BRAKE LIGHT FAILURE. THIS HAPPENS 24/7... THIS SHOULD NOT OCCUR WITH AN ITEM PRICED AT OVER $700.00 TO REPLACE. *TR

Mileage: 66,000

I PURCHASED BY VEHICLE IN THE SUMMER OF 2015. IT HAS BEEN IN THE SHOP NUMEROUS TIMES FOR VARIOUS ISSUES, MOSTLY ELECTRICAL INVOLVING THE COMPUTER AND SOFTWARE, OR ISSUES INVOLVING MY TIRES OR STEERING WHEN TURNING THE STEERING WHEEL.. MY "DRIVER ASSIST" HAS MALFUNCTIONED MANY TIMES AND I HAVE TAKEN IT TO THE SHOP TO HAVE IT REPAIRED ON 3 SEPARATE OCCASIONS. LAST SUMMER MY FRONT AND REAR LIGHTS STARTED FLICKERING AND STOPPED WORKING. I SPENT $800 FOR THE BACK PASSENGER BRAKE LIGHT AND ALMOST $1000 FOR THE FRONT DRIVER HEAD LIGHT ASSEMBLY. I ALSO HAD TO GET A NEW BATTERY FOR THIS VEHICLE. MY 2015 GMC YUKON XL IS NOW MALFUNCTIONING AGAIN AND THIS TIME, I AM TOLD THAT THE SEAT MOTOR (THAT ALERTS YOU WHEN YOU ARE NEAR AN OBSTACLE HAS BURNED OUT.) ABOUT 4 DAYS AGO, I BECAME AWARE OF TICKING NOISE WHILE MY CAR HAS BEEN IDLE. I IMMEDIATELY SCHEDULED A MAINTENANCE APPOINTMENT. TODAY, I AM ALSO INFORMED THAT MY "LIFTERS" ARE BAD ON THE VEHICLE AND MY ENGINE IS GOING BAD. I AM TOLD THE AIR CONDITIONING CONDENSER HAS BURNED OUT, I AM TOLD THE MOTOR UNDER MY SEAT IS BURNED OUT. I HAVE PERFORMED ROUTINE MAINTENANCE, I GET OIL CHANGES REGULARLY AND USE HIGH QUALITY SYNTHETIC OILS. I TAKE MY CAR TO THE SHOP AT LEAST 2X PER YEAR FOR PROBLEMS AND SOME MAJOR REPAIR IS ALWAYS REQUIRED. THIS IS A CAR THAT I AM GOING INTO THE 5TH YEAR OF OWNERSHIP THIS SUMMER. ORIGINALLY. I WAS TOLD THAT THERE WAS A RECALL FOR BRAKES, NOW I AM TOLD THERE IS NOT, BUT I HAVE TAKEN MY CAR IN FOR VARIOUS RECALLS AT LEAST 3X. THIS IS AN UNSAFE, DEFECTIVE VEHICLE. EVERY SYSTEM FAILS. I AM NOW IN SEARCH OF A NEW VEHICLE. I HAVE DRIVEN OTHER GM VEHICLES (GRAND AM, HUMMER) AND NONE HAVE REQUIRED SO MUCH REPAIR COSTS. TODAY I AM TOLD THAT IT WILL COST $6800 TO REPAIR MY VEHICLE TO MAKE IT SAFE. MY REPAIR RECORDS WILL SHOW THE REPAIRS AND SERVICE CHARGES I HAVE PAID SINCE PURCHASE. THIS IS A LEMON. *TR

TL* THE CONTACT OWNS A 2015 GMC YUKON XL. THE CONTACT STATED WHILE DRIVING 45 MPH, THE BRAKE PEDAL WAS DEPRESSED AND WENT TO THE FLOORBOARD. THE CONTACT STATED THAT THERE WAS A VIBRATION IN THE BRAKE PEDAL. THERE WAS NO WARNING LIGHT ILLUMINATED. THE CONTACT STATED THAT THE FAILURE WAS INTERMITTENT. ADDITIONALLY, WHILE DRIVING AT AN UNDISCLOSED SPEED, THE FRONT DRIVER'S SIDE BRAKE PAD DISENGAGED. THE CONTACT INSPECTED THE BRAKE RESERVOIR BOTTLE AND NOTICED THERE WAS NO BRAKE FLUID IN THE RESERVOIR. THE VEHICLE WAS TAKEN TO MAGGIO BUICK GMC (310 NEW ROADS ST, NEW ROADS, LA 70760), TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE FRONT BRAKE PADS AND BALL JOINTS NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 73,000.

Mileage: 73,000

THE BRAKE AND TAIL LIGHTS ON THIS GMC YUKON ONLY RANDOMLY LIGHT UP. HAVE BEEN TOLD RANDOM TIMES BY OTHER MOTORIST THAT BRAKE OR TAIL LIGHTS ARE NOT WORKING ON HIGHWAY. I'VE CONTACTED GM MULTIPLE TIMES ON PHONE AND AT DEALER AND THEY WANT ME TO PAY OUT OF POCKET TO FIX THIS SAFETY ISSUE. THEY FINALLY SENT A LETTER OUT TODAY NOTING THERE AWARE OF THIS PROBLEM BUT STILL WANT FIX MINE BECAUSE IT'S OVER 72K ON YUKON. SAFETY HAS NO MILEAGE LIMIT AND GM NEEDS TO FIX THESE PROBLEMS. GOOGLE THIS ISSUE AND YOU WILL SEE THE INTERNET IS FULL OF COMPLAINTS ABOUT GM LED BRAKE AND TAIL LIGHTS GOING BAD. THANKS FOR ANY HELP WITH THIS MATTER.

Mileage: 71,000

MY VEHICLE HAS SUFFERED FROM POOR SLOW SPEED BRAKING SINCE IT WAS NEW. I WAS TOLD THIS IS JUST A CHARACTERISTIC OF THE VEHICLE. WHEN I POINTED OUT THIS PROBLEM AGAIN, I WAS TOLD THAT GM RECOMMENDS REPLACING THE VACUUM PUMP, BUT SINCE I WAS OUT OF WARRANTY, I WOULD HAVE TO PAY OUT OF POCKET. AFTER NUMEROUS ACCIDENTS AND COMPLAINTS TO THE NHTSA, GM ISSUE A RECALL. THE RECALL DID NOT CALL FOR REPLACING THE VACUUM PUMP AS GM HAD PREVIOUSLY REQUESTED, AND INSTEAD DID A SOFTWARE UPDATE. I JUST HAD THIS RECALL PERFORMED, AND THE BRAKES ARE NOW WORSE THAN EVER BEFORE. TODAY, I WAS PULLING INTO A CARWASH, AND WHEN I HIT THE BRAKES, THEY WERE HARD AS A ROCK AND WOULD NOT STOP MY VEHICLE. I ALMOST HIT THE VEHICLE IN FRONT OF ME. I HAD TO WARN THE PERSON AT THE CARWASH TO BE CAREFUL THAT THE BRAKES WERE NOT WORKING PROPERLY. AFTER HE MOVED MY VEHICLE, HE SAID THAT HE NEW WHAT I WAS TALKING ABOUT. THIS SITUATION CAN BE VERY DANGEROUS. IT MAY CAUSE YOU TO STRIKE THE VEHICLE IN FRONT OF YOU. IF THERE IS A PERSON BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU, SUCH AS A CARWASH, THEY MAY BE CRUSHED BETWEEN THE TWO VEHICLES. THIS PROBLEM OCCURS ONLY AT LOW SPEED SUCH AS PARKING LOTS OR IN STOP AND GO TRAFFIC. THIS PROBLEM HAS BEEN OCCURING SINCE THE VEHICLE WAS NEW. IT IS NOW WORSE AFTER HAVING THE RECALL PERFORMED TO CORRECT THIS PROBLEM. THE MOST RECENT OCCURENCE WAS TODAY.

Mileage: 238,000

ANYTIME THE VEHICLE IS RUNNING THE FUMES FROM THE EXHAUST MAKE ME AND MY KIDS FEEL NAUSEOUS AND GIVING HEADACHES JUST FROM WALKING TO/AROUND THE TRUCK TO GET IN. WE ARE TAKING THIS TRUCK TO THE DEALER ON MONDAY. BEING THE 3RD DEALER WE HAVE TAKEN IT TO IN THE PAST YEAR. HAVE HAD MANY OTHER ISSUES OUT OF THIS VEHICLE AND JUST CANT SEEM TO GET THEM ALL FIXED. FOR SUCH A PRICEY VEHICLE YOU WOULDNT THINK THERE WOULD BE THIS MANY PROBLEMS. THE LIFT GATE IS POPPING NOT WANTING TO OPEN OR SHUTS ON YOU AS YOU WALK UNDER IT. THE WINDOW APPLIQUES ARE JUST SLOWLY FLYING OFF 1 BY 1. TRANSMISSION IS HARD SHIFTING IN LOW GEARS, DURING ACCELERATION AND DECELERATION. WE HAVE A HORRIBLE GRINDING/SQUEAKING NOISE IN THE FRONT THAT YOU CAN FEEL IN THE FLOOR BOARDS. THE BRAKES, WE HAD A MODULE REPLACED, BUT IT STILL FEELS AS IF WHEN PUSHING THE PEDAL IT LOOSES PRESSURE, CAUSING NEAR ACCIDENTS. THIS IS INSANE!!!!!! BOOUGHT THIS TRUCK JUST OVER A YEAR AGO AND HAVE HAD NOTHING BUT PROBLEMS. WASTE OF TIME AND MONEY!

Mileage: 85,600

I WAS NEVER NOTIFIED OF A RECALL ON THE VACUUM PUMP THAT CONTROLS THE BRAKES. MY BRAKES WENT OUT WHILE DRIVING WITHOUT WARNING. BROUGHT IT TO THE DEALERSHIP, AND OF COURSE THEY ONLY COVERED THE RECALIBRATION OF THE VACUUM PUMP BUT NOT THE VACUUM PUMP ITSELF. ABSOLUTELY RIDICULOUS AND VERY EXPENSIVE REPAIR THAT I FEEL GMC SHOULD BE RESPONSIBLE FOR IN FULL.

Mileage: 101,000

TL* THE CONTACT OWNS A 2015 GMC YUKON XL. WHILE DRIVING APPROXIMATELY 10-15 MPH, THE BRAKE PEDAL WAS DEPRESSED, BUT FAILED TO STOP THE VEHICLE. AS A RESULT, THE CONTACT'S VEHICLE CRASHED INTO THE REAR OF ANOTHER VEHICLE. A POLICE REPORT WAS FILED. THERE WERE NO INJURIES. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. GEOFF PENSKE BUICK GMC (100 S MUSEUM RD, SHILLINGTON, PA 19607, (484) 525-0979) WAS CONTACTED AND INFORMED THE CONTACT THAT THE VEHICLE WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 19V645000 (SERVICE BRAKES, HYDRAULIC). THE MANUFACTURER WAS CONTACTED AND PROVIDED CASE NUMBERS: 9-5487572705 AND 9-5520075396. THE APPROXIMATE FAILURE MILEAGE WAS 57,000.

Mileage: 57,000

WHEN DRIVING AT SLOW SPEEDS I LOSE BREAKING POWER. IT TAKES BOTH FEET PRESSING AS HARD AS I CAN TO GET THE CAR TO STOP. I HAVE NEARLY HIT TWO CARS WHILE PARKING AND SEVERAL IN TRAFFIC WHILE IN RUSH HOUR. IT FEELS AS THOUGH I LOSE VACUUM. IF I INCREASE THE RPM'S ON THE VEHICLE I REGAIN VACUUM. USUALLY HAPPENS WHEN PARKING.

Mileage: 103,000

MY 2015 YUKON XL HAS NO BRAKE LIGHT THAT IS WORKING ON THE LEFT SIDE. I THOUGHT MAYBE YOU COULD REPLACE THE BULB BUT AS I FOUND OUT, IT IS A LED SEALED UNIT THAT WAS NEVER MEANT TO GO OUT. NOW AS I LOOK UP THIS PROBLEM WITH OTHER YUKON XL OWNERS, I SEE THAT IT IS A PROBLEM WITH LOTS OF OWNERS! SO WHY IS THIS NOT A RECALL ITEM BY NOW. APPARENTLY IT IS A BIG ISSUE! A NEW WHOLE LIGHT ASSEMBLY TO FIX THIS ISSUE IS OVER 800 BUCKS! THESE BRAKE LIGHTS NOT WORKING ARE A HUGE SAFETY ISSUE!

Mileage: 56,000

THE BRAKE PEDAL WAS VERY HARD AND WOULD NOT COMPLETELY STOP THE VEHICLE AS VERY LOW SPEED IN THE DRIVEWAY. STOPPED AND RESTARTED THE ENGINE AND THE OPERATION WAS NORMAL. THIS HAS OCCURRED ONE TIME EARLIER SEVERAL MONTHS BEFORE AND HAS OPERATED NORMALLY SINCE.

Mileage: 75,000

THE BRAKE/TAIL LIGHTS WORK SOMEDAYS, AND NOT OTHER DAYS. ONE DAY THE ARE BOTH WORKING, ONE DAY ONLY ONE WORKS, AND SOME DAYS NEITHER WORK. THIS IS A PROBLEM THAT IS VERY PREVALENT. JUST LOOK ONLINE. I HAVE PERSONALLY PHOTOGRAPHED SEVERAL OF THE SAME ISSUE ON THIS MAKE AND MODEL IN MY HOMETOWN. THE DEALERSHIP WANTS ME TO PAY $1300 TO HAVE NEW LIGHTS INSTALLED AND GMC IS IN DENIAL OF THEIR PROBLEM.(THE BACK UP/REVERSE WHITE LIGHT WORKS ALL OF THE TIME, ITS THE RED BRAKE/TAIL LIGHT THAT DOESN'T WORK) THIS SHOWS THAT ITS AN ISSUE THAT SHOULD BE RECALLED, NOT REPLACED AT THE OWNER'S EXPENSE.

Mileage: 80,000

TL* THE CONTACT OWNS A 2015 GMC YUKON XL. WHILE DRIVING 60 MPH, THE REAR DRIVER'S SIDE BRAKE LIGHT FAILED TO ILLUMINATE. THE VEHICLE WAS TAKEN TO FIVE STAR CHEVROLET BUICK GMC (LOCATED AT 495 WATSON BLVD, WARNER ROBINS, GA 31093, (478) 387-4424) WHERE IT WAS DIAGNOSED THAT THE BRAKE ASSEMBLY NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED, BUT THE FAILURE RECURRED APPROXIMATELY 5 MONTHS LATER. THE CONTACT TOOK THE VEHICLE BACK TO THE DEALER FOR REPAIRS AND AN OIL CHANGE. THE CONTACT WAS INFORMED THAT LIFTERS ON THE ENGINE AND CONDENSER LINE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED. THE FAILURE MILEAGE WAS 96,000.

Mileage: 96,000

WHILE ON VACATION HE BRAKES STARTED FADING, ESPECIALY AT SLOW SPEEDS. CREATING A VERY UNSAFE SITUATION AT HIGHWAY SPEEDS. MY DEALER SAYS THEY HAVE NOT HAD ANY PROBLEMS BUT IT IS ALL OVER THE INTERNET.

Mileage: 70,000

WHILE DRIVING MY YUKON, I WAS PREPARING TO STOP A LIGHT ONLY TO STRUGGLE WITH PRESSING THE BRAKE PEDAL, ALMOST HIT A VEHICLE THAT WAS IN FRONT OF ME

Mileage: 90,000

TAKATA RECALL DRIVER SIDE BRAKE LIGHT STOP WORKING WHILE DRIVING IN THE CITY STREETS

Mileage: 110,880

INTERMITTENT BRAKE LIGHT ACTIVATION ON BOTH LEFT AND RIGHT. IT HAPPENS STOPPED AND IN MOTION. VERY DANGEROUS! IT IS A KNOWN ISSUE WITH BROKEN CONTACTS INSIDE A SEALED HOUSING. THE ISSUE IS POSTED ALL OVER THE FORUMS BUT GMC REFUSES RESPONSIBILIY.

Mileage: 30,000

POWER BREAKING FAILS WHEN DRIVING AT LOW SPEEDS, BRAKE PEDAL STIFF AND HARD TO PUSH DOWN TO STOP VEHICLE IN BOTH FORWARD AND REVERSE DIRECTIONS WHEN INCHING FORWARD AT A STOP LIGHT/SIGN, OR PARKING IN A PARKING LOT IN FORWARD AND REVERSE CAR KEEPS MOVING. STOPPING REQUIRED VERY HARD PUSH ON THE STIFF BRAKE PEDAL.. BRAKING AT HIGHER SPEEDS LESS AFFECTED BUT SUDDEN STOPS CAN REQUIRE MORE FORCE THAN USUAL AS THE CAR SLOWS DOWN. PROBLEM BEGAN DECEMBER 2017 RARELY AND INTERMITTENTLY, AND INCREASED TO ALL THE TIME BY FEBRUARY 2019 AT LOW SPEEDS THE POWER BRAKE DID NOT WORK AND REQUIRED MUCH FORCE ON THE BRAKE PEDAL TO STOP VEHICLE EVERY TIME. BRAKE FLUID WAS FINE AND SO WAS BRAKE PADS. GM DEALERSHIP VISIT SHOWED A FAILURE OF THE VACUUM PUMP FOR BRAKE LINE AND THEY INSTALLED A REDESIGNED PUMP WHICH SHOWS THAT THE ORIGINAL HAS FAULTY DESIGN. THEY ALSO REQUIRED A BELT THAT OPERATES PUMP TO BE REPLACED AS WELL. THIS SEEMS TO HAVE FIXED THE PROBLEM FOR NOW BUT THIS REPAIR HAS A TWO YEAR GUARANTEE. PRICE FOR ME TO FIX OVER $881+TAX.

Mileage: 48,000

I LOST BRAKES. EXTREME PRESSURE ON PEDDLE REQUIRED FOR BRAKES TO ENGAGE. EVEN THEN ONLY REDUCED BRAKING POWER WAS AVAILABLE. REQUIRED REPLACEMENT OF VACUUM PUMP AND BOOSTER. OCCURRED WHEN VEHICLE ENGINE WAS AT IDLE. OTHERWISE BRAKES FELT WEEK BUT AVAILABLE.

Mileage: 90,000

BRAKE PEDAL IS STIFF AT LOW SPEEDS. THE PEDAL LOCKS UP AND STOPPING IS DELAYED 2 TO 3 FEET. IT MAKES OPERATING THE VEHICLE UNSAFE. I HAVE DONE RESEARCH ON THIS ISSUE. OTHERS ARE EXPERIENCING THE SAME DANGEROUS DELAYED STOPPING DISTANCE AND STIFF BRAKE PEDAL AT LOW SPEEDS.

Mileage: 60,000

FROM TIME TO TIME BRAKE PEDAL BECOMES HARD WHEN BACKING UP OR GOING FORWARD MAKING THE VEHICLE HARD TO COME INTO A COMPLETE STOP.

Mileage: 60,000

THE BRAKE LIGHTS ON MY 2015 GMC YUKON XL HAVE BOTH GONE OUT. I HAVE BEEN PULLED OVER AND QUESTIONED ABOUT IT SEVERAL TIMES BY MY LOCAL LAW ENFORCEMENT. I BELIEVE THE MANUFACTURER STATE THAT THEY HAVE A LIFE OF 40,000 HOURS OF CONTINUOUS USE BUT, ONLY FUNCTION FOR A FRACTION OF THIS AMOUNT & THEY ARE $600-700 TO REPLACE.

Mileage: 67,000

WHEN COMING TO A STOP, THE BRAKE PEDAL BECAME STIFF AND DID NOT ENGAGE. THIS HAS HAPPENED ON MULTIPLE OCCASIONS IN THE PAST, AND HAPPENS WHEN THE VEHICLE IS TRAVELING AT SLOW SPEEDS (LESS THAN 5MPH). THE ISSUE IS A FAULTY POWER BREAK PUMP.

Mileage: 80,000

TODAY, WHILE COMING TO A STOP, THE BRAKE PEDAL BECAME STIFF AND DID NOT ENGAGE. THIS HAS HAPPENED ON MULTIPLE OCCASIONS IN THE PAST, AND HAPPENS WHEN THE VEHICLE IS TRAVELING AT SLOW SPEEDS (LESS THAN 5MPH).

Mileage: 53,100

WE PURCHASED THIS VEHICLE ON 11.21.18 AND THE BRAKE LIGHTS INTERMITTENTLY DON'T WORK. THEY WERE WORKING AT THE TIME WE DROVE IT OFF THE LOT. THE BULBS WERE TESTED BY OUR MECHANIC AND HE STATED THAT THE GMC YUKON OF THIS YEAR ARE KNOWN TO HAVE MAJOR PROBLEMS WITH THE BRAKE LIGHT HOUSING UNITS ON THE REAR OF THE VEHICLE. THE ELECTRICAL BOARD ASSOCIATED WITH IT HAS ISSUES THE MECHANIC STATED. I REVIEWED MANY POST ONLINE AND WONDER WHY THIS ISN'T A REQUIRED RECALL. TO ME THIS IS A MAJOR SAFETY CONCERN AND WE BOUGHT THIS VEHICLE TO TRANSPORT MY KIDS AND WIFE. I'D LIKE THIS TO BE CONSIDERED A RECALL IMMEDIATELY.

Mileage: 41,000

TL* THE CONTACT OWNS A 2015 GMC YUKON XL. WHILE DRIVING 5 MPH AND LOW SPEEDS, THE BRAKES SEIZED. WHEN DRIVING AT HIGHER SPEEDS, THE BRAKES PERFORMED PROPERLY. THE CONTACT WOULD HAVE TO PLACE THE VEHICLE IN NEUTRAL AND REV THE ENGINE FOR THE BRAKES TO WORK. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE WAS TAKEN TO SEILVEIRA BUICK GMC (985 HEALDSBURG AVE, HEALDSBURG, CA 95448, (866) 572-7256) WHERE IT WAS DIAGNOSED THAT A NEW VACUUM PUMP NEEDED TO BE INSTALLED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND DID NOT ASSIST. THE FAILURE MILEAGE WAS 105,000.

Mileage: 105,000

WHILE IN MOTION THE BRAKES WENT OUT COMPLETELY IN JULY 2015. THEN WHILE DRIVING DOWN THE INTERSTATE AT 75 MPH THE BRAKES WENT OUT COMPLETELY IN 2018. BOTH TIMES I WAS CHARGED A DEDUCTIBLE. BOTH TIMES THE COMPLETE BRAKE SYSTEM WAS COMPLETELY REPLACED BY A DEALERSHIP. AFTER THE SECOND INCIDENT I CONTACTED GMC. AFTER NUMEROUS PHONE CALLS THE OFFERED ME $2000 TOWARDS A NEW VEHICLE. I WAS VERY UPSET WITH THEM AND THREATENED TO GET A LAWYER IF I WAS HURT IN THIS VEHICLE OR HURT OTHERS IN THE FUTURE. IT WAS A TERRIFYING EXPERIENCE AND I FELT LIKE I DESERVED MORE. THEY WOULDN'T EVEN PAY FOR THE RENT A CAR I HAD TO USE ON MY VACATION WHILE THE BRAKE SYSTEM WAS REPLACED. I PAID $70,0000 FOR THIS CAR, BUT DON'T WANT TO FEAR LOOSING BRAKES EVER AGAIN!

Mileage: 60,000

WHILE OPERATING THE VEHICLE AND ATTEMPTING A STOP THE BRAKING BECAME POOR AND I HAD TO DEPRESS THE BRAKE PEDAL AS HARD AS I COULD. HOWEVER, EVEN AFTER THAT THE VEHICLE DID NOT STOP RIGHT AWAY AND TOOK MORE DISTANCE TO COME TO A FULL STOP. THE BRAKE FELT "SOFT" AND NOT LIKE IT USUALLY DOES. INTERESTINGLY...THE BRAKE WOULD SEEM TO WORK AGAIN IMMEDIATELY AFTER THE INCIDENT. I'VE HAD PROBABLY 3 OR 4 INCIDENTS, OVER THE PAST YEAR, WHERE THIS HAS HAPPENED. NONE OF THE INCIDENTS HAVE RESULTED IN ANY TRAFFIC INCIDENTS, BUT ALL HAVE REQUIRED MORE STOPPING DISTANCE THAN NORMAL. ALL OF THE INCIDENTS HAVE TYPICALLY OCCURRED AT LOWER SPEEDS (LESS THAN 40 MPH).

Mileage: 77,000

WHEN MOVING IN A PARKING SPOT THE BRAKE PEDAL BECAME HARD AS IF IT LOST POWER BRAKES, BUT THEN RETURNED. A FEW DAYS LATER ON THE FREEWAY TRAFFIC STOPPED IN FRONT OF US AND IT HAPPENED AGAIN. THIS CAUSED US TO NEED TO SWERVE TO AVOID CAUSING AN ACCIDENT UNTIL WE WERE ABLE TO COME TO A STOP. AFTER SEVERAL MILES THE POWER BRAKES HAVE NOT RETURNED. THERE IS OIL IN THE VACUUM LINE AT THE BOOSTER AND GAS MILEAGE YA BEEN POOR THE PAST FEW WEEKS PRIOR TO THIS. IT ALL POINTS TO A FAULTY VACUUM PUMP. 121,000 MILES ON THE TRUCK.

Mileage: 121,000

BRAKE VACUUM PUMP FAILED. WHILE TOWING A BOAT AND BACKING UP MY BRAKE PEDAL WENT HARD WHEN I PUSHED DOWN AND MY VEHICLE WOULD NOT STOP. I WAS ABLE TO STEER OUT OF DANGER AND EVENTUALLY COME TO A STOP.

Mileage: 62,300

MY PASSENGER FRONT LIGHT COVER IS ACQUIRING CONDENSATION WHICH MAKES THE LIGHTS GO OFF AND ON, AND MY DRIVER SIDE BRAKE LIGHT WORKS ONLY INTERMITTENTLY. MY INSURANCE OR WARRANTY WON'T COVER ANYTHING TO FIX THESE LIGHT ISSUES. THESE ISSUES STARTED ABOUT MAY 2018. WE WEREN'T IN A WRECK OR SUSTAINED ANY DAMAGES THAT WOULD HAVE LED TO THESE ISSUES. I HAVE TALKED TO TWO OTHER OWNERS OF THE SAME MAKE/MODEL/YEAR VEHICLE AND WE ALL HAVE SAFETY ISSUES THAT ARE NOT BEING RESOLVED BY GM VWARRANTIES. I WANT TO SEE GM ISSUE RECALLS AND ACCEPT COMPLETE FINANCIAL RESPONSIBILITY FOR REPAIRS. I WOULD ALSO LIKE TO SEE THE REAR LIGHTING SYSTEM REDESIGNED SO THE COMPONENTS ARE NOT DEPENDENT ON EACH OTHER. MY BRAKE LIGHT WENT OUT AND INSTEAD OF BEING ABLE TO REPLACE A BULB THE ENTIRE UNIT HAS TO BE REPLACED AT $1700.00 THAT WE JUST SIMPLY DO NOT HAVE.

MY RIGHT SIDE BRAKE ASSEMBLY SEEMS TO ONLY WORK WHEN IT WANTS TOO. WORKS ON COLD MORNINGS, BUT AS THE DAY GETS WARMER THE LIGHT ASSEMBLY DOESN'T WORK ANYMORE. NO LIGHTS, OR BRAKE LIGHTS.

Mileage: 52,000

WHILE DRIVING AT SLOW SPEED IN SCHOOL PARKING LOT BRAKE PEDAL FAILED TO STOP VEHICLE WHEN USING NORMAL BRAKE PRESSURE. PEDESTRIAN IN FRONT OF VEHICLE JUMPED OUT OF THE WAY TO AVOID BEING STRUCK.

Mileage: 56,000

...WIFE STOPPED ON HILL TO SPEAK TO SON.. I BELIEVE AT THIS POINT THE VEHICLE WENT TO NEUTRAL, WHEN SHE TRY TO GO FORWARD, IT WENT DOWN THE HILL HIT A POLE AND ROLLED OVER.

Mileage: 3,000