2015 GMC Sierra 1500
Problems, recalls and owner-reported issues
Service brakes is the leading concern among 817 owner complaints filed for this model year. This is the 2nd highest complaint count among 26 Sierra 1500 model years with reports.
Of the 2015 reports, 29 involved a crash and 10 involved a fire. 14 people were injured.
What owners report most often
Recalls and investigations
Air bags, side/window, curtain, inflatorJul 1, 2021
General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500, 2500, 3500, and Chevrolet Silverado 1500, 2500, and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator, or the inflator sidewall may rupture.
A separated inflator end cap or inflator rupture can allow compressed gas to escape, resulting in the end cap or other components being propelled into the vehicle, increasing the risk of injury or crash.
Dealers will replace the left and right side RRAB modules, free of charge. Interim owner notification letters informing owners of the safety risk were mailed on August 18, 2021. Owners will receive a second notice when the remedy is available. Phase I owner notification letters were mailed on May 5, 2022. Phase II owner notification letters are expected to be mailed on May 31, 2022. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. This recall supersedes NHTSA recall number 20V-736. GM's number for this recall is N202324251.
Campaign 21V504000 on NHTSA.gov
Seat belts, frontApr 8, 2021
General Motors, LLC (GM) is recalling certain 2014-2016 Chevrolet Silverado 1500, 2015-2016 Chevrolet Tahoe, and 2014-2015 GMC Sierra 1500 vehicles that may have received an incorrect replacement tensioner cable assembly as part of a previous recall remedy or a subsequent repair. The flexible steel cable connecting the driver's seat belt to the outboard side of the seat may be repeatedly bent over the seat side shield as the driver enters and exits the vehicle causing the cable to fatigue and separate.
A broken pretensioner cable reduces the effectiveness of the driver's seat belt, increasing the risk of injury.
GM will notify owners, and dealers will replace the driver seat belt lap pretensioner, free of charge. The recall began on May 5, 2021. Owners may contact Chevrolet customer service at 1-800-222-1020, and GMC customer service at 1-800-462-8782. GM's number for this recall is N212330040.
Campaign 21V245000 on NHTSA.gov
Air bags, side/window, curtain, inflatorNov 25, 2020
General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500 and Chevrolet Silverado 1500 and 2015 GMC Sierra 2500 and 3500, and Chevrolet Silverado 2500 and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator.
If the end cap separates from the inflator, the compressed gas will escape and the end cap can be propelled into the vehicle, increasing the risk of injury or a crash.
GM will notify owners, and dealers will replace the RRAB modules on the left and/or right side, free of charge. Interim owner notification letters were mailed on December 22, 2020. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. Note: GM filed a new recall, number 21V-504 that supersedes this recall. All vehicles previously recalled under 20V-736 will now be repaired under the new recall number 21V-504. GM's numbers for this recall are N202309680, N202309681, and N202309682.
Campaign 20V736000 on NHTSA.gov
Service brakes, hydraulic, antilock/traction control/electronic limited slip, wheel speed sensor/tone ringOct 24, 2019
General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive. If a wheel-speed sensor fails, while the vehicle is traveling between 41 and 60 mph in four-wheel or automatic mode, the Electronic-Brake Control Module (EBCM) software may activate the driveline-protection system.
Unintended activation of the driveline-protection system will cause unintended braking on the wheel on the opposite side of the failed sensor, causing the vehicle to pull to one side unexpectedly, increasing the risk of a crash.
GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall began December 11, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192261050.
Campaign 19V761000 on NHTSA.gov
Service brakes, hydraulic, power assist, vacuumSep 6, 2019
General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.
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.
GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began October 8, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-458-8006 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192268490.
Campaign 19V645000 on NHTSA.gov
Steering, electric power assist systemSep 7, 2018
General Motors LLC (GM) is recalling certain 2015 Chevrolet Silverado 1500, Tahoe and Suburban, GMC Sierra 1500 and Yukon, and Cadillac Escalade vehicles. Electric power steering (EPS) assist may be lost momentarily, followed by a sudden return of EPS assist.
If EPS assist is lost and then suddenly returns, the driver may have difficulty steering the vehicle, especially at low speeds, increasing the risk of a crash.
GM will notify owners, and dealers will update the EPS module software, free of charge. The recall began October 12, 2018. Owners may contact Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020 and GMC customer service at 1-800-462-8782. GM's number for this recall is 18289.
Campaign 18V586000 on NHTSA.gov
Air bags, frontalJul 10, 2017
General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and 3500 and GMC Yukon and Yukon XL vehicles, and 2015-2017 GMC Sierra HD 2500 and 3500 vehicles. While being previously remedied for recall 16V-651, the affected vehicles may not have received the complete software update necessary to remedy the recall condition. Without the update, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on August 4, 2017. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 17287.
Campaign 17V437000 on NHTSA.gov
Air bags, frontalSep 8, 2016
General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra 1500, Buick Encore, and 2014-2016 Buick Lacrosse, Chevrolet Spark EV and SS vehicles. In the affected vehicles, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on October 13, 2016. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 16007.
Campaign 16V651000 on NHTSA.gov
Seat beltsApr 12, 2016
General Motors LLC (GM) is recalling certain model year 2014-2015 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks manufactured January 29, 2013, to January 21, 2015. While entering the vehicle, the seat belt tensioner cable may be positioned such that the driver slides over it. This movement may result in the fatigue and separation of the cable.
If the tensioner cable separates, the driver may not be properly restrained in the event of a crash, increasing their risk of injury.
GM will notify owners, and dealers will modify the vehicles to prevent the tensioner from being damaged. Any tensioner that has already been damaged will be replaced, free of charge. The recall began on August 11, 2016. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is 15822.
Campaign 16V209000 on NHTSA.gov
Representative owner complaints: service brakes
242 reports, newest first. Show all
Service brakes, Engine, Aug 27, 2019
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.
Service brakes, Aug 26, 2019
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.
Service brakes, Jul 29, 2019
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.
Service brakes, Engine, Visibility/wiper, Jul 23, 2019
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.
Service brakes, Jul 9, 2019
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.
Service brakes, Jul 5, 2019
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.
Service brakes, Jul 5, 2019
THE BRAKE TURN HARD WHEN I AM GOING IN REVERSE IN A SLOW SPEED.
Service brakes, Jul 3, 2019
BRAKE PEDAL STIFF/HARD WHEN APPLYING BREAKS. PROBLEM OCCURS PERIODICALLY WITHIN THE CITY AND HIGHWAY.
Steering, Service brakes, Engine, Jul 2, 2019
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.
Service brakes, Jul 2, 2019
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.
Service brakes, Jul 2, 2019, crash
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.
Service brakes, Jun 30, 2019
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.
Service brakes, Jun 28, 2019, crash
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.
Service brakes, Jun 25, 2019
WHEN YOU STEP ON THE BRAKES IN MOTION THE BRAKE PEDAL IS HARD AND VEHICLE TAKES LONGER TO STOP.
Service brakes, Jun 23, 2019
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.
Other or unspecified, Service brakes, Jun 19, 2019
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.
Service brakes, Jun 12, 2019
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.
Steering, Service brakes, Hydraulic, May 29, 2019
TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 30 MPH, THE BRAKE PEDAL BECAME STUCK WITHOUT WARNING. THE VEHICLE WAS TOWED TO MARTIN CADILLAC (310-736-2266, LOCATED AT 12101 W OLYMPIC BLVD, LOS ANGELES, CA 90064). THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE CONTACT ALSO RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 18V586000 (STEERING). THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS 40,699.
Service brakes, May 28, 2019
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.
Service brakes, May 20, 2019
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.
Service brakes, May 17, 2019
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.
Service brakes, May 16, 2019
I AFTER PULLING INTO A SERVICE STATION, I WAS BACKING UP AND SUDDENLY HAD NO BRAKES. I ALMOST HIT ANOTHER VEHICLE.
Service brakes, May 13, 2019
HARD TO NO BRAKING AT LOW SPEED. POWER BRAKE ASSIST FAILURE.
Service brakes, May 6, 2019
INCREASED / INCONSISTENT BRAKE PEDAL EFFORT AT LOW SPEEDS; TRUCK TAKES MORE EFFORT TO STOP, INCREASED BREAKING DISTANCE
Service brakes, May 2, 2019
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.