GMC Sierra Complaints

15,732 consumer complaints on file.

#11495766December 2, 2022
FUEL SYSTEM, DIESEL
The contact owns a 2016 GMC Sierra 2500. The contact stated while driving 70 MPH, the vehicle lost motive power and stalled inadvertently, almost causing a crash. There was no warning light illuminated. The contact stated that she was able to veer to the side of the road by dodging traffic. The vehicle failed to restart. The vehicle was towed to the dealer where it was diagnosed that the high-pressure fuel pump had exploded and projected metal fragments throughout the high-pressure fuel system. The vehicle was repaired at the owner’s expense. The manufacturer was notified of the failure and informed the contact that a partial reimbursement would be made. The failure mileage was approximately 114,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11495642December 1, 2022
ENGINE
I was on the highway going 60mph and the engine light came on and it said “low oil pressure, turn off engine”. I could not safely pull over and had to drive a half mile to do so. The vehicle was towed to the service station near my house that I’ve used before and the problem was a blown high pressure oil line. Technician said that the hose came undone at the crimp joint and that he’s recently seen other Sierras with the same problem. I checked my GMC app and there were no recalls so I authorized the repair and paid the $919 bill. A few days later I did a google search for 2019 GMC Sierra oil line problems and got several hits from the GMauthority.com site. It’s a known problem in Canada and Alaska (cold weather) and GMC will repair it at no charge if the vehicle was bought there and the repair is done by a GMC repair facility but they won’t reimburse me because I bought mine in MA. It was 24 degrees the day the line blew. The problem is that the part is faulty and fails at cold temperatures. There should be a recall on the high pressure oil lines for all vehicles sold in cold weather states.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11495699December 1, 2022
ELECTRICAL SYSTEM
The service trailer brake icon keeps appearing on my screen I’m afraid it’s going to not work properly when towing trailers it’s constantly going on and off I believe it’s the brake control module switch but also could be in the harness just want Gm to be aware of the many blogs that I have read about with this problem The problem first appeared about two months ago
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11495476November 30, 2022
SERVICE BRAKES, HYDRAULIC
The contact owns a 2014 GMC Sierra 1500. The contact stated while driving approximately 60 MPH, as the contact slowed for traffic, the brake pedal became very hard to depress. The contact stated he had to use more than normal leg strength to depress the brake pedal. The contact stated no warning light was illuminated. The contact stated that the failure had become reoccurring. The contact stated that the failure of the brakes also occurred while starting the vehicle and shifting into either drive(D) or reverse(R). The contact had not taken the vehicle to a local dealer or mechanic. The vehicle had not been diagnosed or repaired. The manufacturer had been informed of the failure. The contact researched online and related the failure to NHTSA Campaign Number: 19V645000 (Service Brakes, Hydraulic). The failure mileage was approximately 189,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11495540November 30, 2022
SERVICE BRAKES
Hard break peddle at low speeds, break booster issue
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11495266November 29, 2022
SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11495337November 29, 2022
POWER TRAIN
Transmission Control Module TCM failed while driving down the freeway I84 in Boise Idaho. AC Delco part number 24256861. This caused the truck to go into limp mode when at highway speed. While in limp mode the truck would not respond to throttle commands. Truck slowed to 20mph causing a disruption in traffic flow and making it very difficult to get off the freeway, dodging traffic. The TCM failure has been confirmed through a local GMC dealer (Dennis Dillon in Boise Idaho). The Manufacture (General Motors) has discontinued manufacturing this part leaving my vehicle and thousands of others failed. GM's responce is the part is on a national backorder. 24-26 months at the earliest. Aftermarket support is none existent. There were no warning lamps or messages or symptoms prior to the failure. Very limited parts are available on Ebay (10 or less) . Dealer price for the TCM is $710. Ebay pricing is 4-10 thousand. GM customer assistance provides no answers and fails to ackowledge the safety concern of the failed transmission controller.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11495342November 29, 2022
SERVICE BRAKES, ELECTRICAL SYSTEM, STEERING
The truck has 50,000 miles, purchased new. I don't tow or go off road. I take it to the dealer every 5,000 miles. While driving 65-70mph on the interstate (4-lanes), my dash lit up with five messages and the "Brake, Traction Control and Engine" lights illuminated. I applied brakes but the pedal went to the floor and the steering veered to the left causing me to move out of my lane. The truck then went to limp mode and I was unable to go above 43mph the remainder of the trip home. After taking it to my dealer the next day, I was told they "found air in the brake fluid system due to secondary seal failure in brake master cylinder, and was quoted a new cylinder (PN 86788482) for $1708.06. RESPONSE TO QUESTIONS: >Component failure: brake master cylinder (eBoost Brake Unit Assembly) / Brake System Failure >It was just me in the vehicle - brake failure on the highway put me and others on the road at major risk >Yes - After paying to diagnose, I was told this was brake master cylinder failure. ...GM issued a Customer Satisfaction Program (N202324120) for a limited number of MY2021 Silverado/Sierra trucks (mine is a MY2019) for dealers to replace the eBoost brake unit assemblies due to failure >Part has not been inspected by my insurance rep./I do not know if anyone else has inspected >The warnings illuminated on the dash at the time of brake failure while on the interstate 1. "Service ESC" 2. "Service Trailer Brake System" 3. "Steering Assist Is Reduced Drive with Care" 4. "Service Brake Assist" 5. "Brake System Failure 43 MPH Top Speed" 6. Also, the BRAKE, Traction Control and Engine lights illuminated
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11495345November 29, 2022
TIRES:TREAD/BELT
Goodyear Wrangler Trailrunner AT, LT275/65R20, factory installed on a 2020 GMC Sierra Denali 3500. While traveling 60 mph pulling a fifth wheel in South Texas on a clear and dry day, the rear passenger tire unexpectedly lost its tread. As we slowed down, it completely lost tire pressure and we ran on the rim until coming to a complete stop. Immediately prior to the incident, the TPMS and other safety systems in the truck read normal. There were no system warnings and no objects in the road. It put us in a dangerous situation as we were stopped on the shoulder of the highway right before a bridge and had our 3 children in the backseat. We called the police, but they never sent anyone to help with traffic. The rear fender and the wheel well of the truck were badly damaged. We have the faulty tire and it is available for inspection.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11494999November 26, 2022
FUEL/PROPULSION SYSTEM
Gas leak. My 2018 gmc sierra 1500 has been giving me two codes for evap leak small and large and i notice a black spot on my drive way under the gas tank wich in fact was gas. I can see the gas tank is wet but it comes from the top part of the gas tank. I been looking for recalls on this but there isnt any for this specific year of GMC sierra 1500 slt.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11494861November 25, 2022
FUEL/PROPULSION SYSTEM, FUEL SYSTEM, DIESEL
Within 100 miles after purchasing this truck from GMC (used with 74K miles)I got messages both on my phone and later through inspection at GMC service center that the DEF system had a problem. The check engine light came on then off as well.I was getting messages saying I only had so many miles before the DEF system needed more fluid even though the tank was full or near full. The dealer here in Tucson indicated there was a bulletin on this problem and ordered parts for the repair. I was informed it was not a recall and I would have to pay over $800.00 for this repair. To date the dealer has had my truck for 2 weeks. Additionally, another message said insufficient coolant flow so they are installing a new coolant pump to be paid for by an after market warranty which I purchased at the time I bought the truck. This repair is over $1000.00
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11494668November 23, 2022
ELECTRICAL SYSTEM
I REMOTE STARTED THE VEHICLE FOR ABOUT FIVE MINUTES. I THEN GOT IN, AND TURNED THE KEY ON AND SAT IN THE VEHICLE. WHILE IT WAS IDLING, I SMELLED SOMETHING BURNING. I OBSERVED A RELAY? ON THE REAR WINDOW BURNING. I COULD SEE A FLAME (INSIDE OF THE TRUCK) , AND THE TRUCK CAB FILLED WITH SMOKE. THE RELAY EXPLODED, AND THE REAR WINDOW SHATTERED. I SHUT THE TRUCK OFF, AND THE FIRE WENT OUT. I OPENED ALL THE DOORS AND CLEARED THE SMOKE OUT. I BELIEVE THE RELAY FOR THE REAR WINDOW DEFOGGER FAILED, CAUSING IT TO OVERHEAT AND START A FIRE. I AM REPLACING THE ENTIRE REAR WINDOW. THIS IS A FIRE HAZZARD, AND A DRIVING HAZZARD DUE TO THE CAB FILLING WITH SMOKE. THERE WAS ABSOLUTELY NO WARNING OR WARNIG LIGHTS THAT THIS WAS ABOUT TO HAPPEN.
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0
#11494755November 23, 2022
COMMUNICATION, ELECTRICAL SYSTEM:ADAS:DRIVER MONITORING:ALARM
The contact owns a 2022 GMC Sierra 2500. The contact stated that two days after he purchased the vehicle, he noticed that there was no back-up communication alarm on the vehicle. No warning light was illuminated. The vehicle was not diagnosed or repaired. The dealer and the manufacturer were notified of the failure and the contact was offered a trade-in or buy back for equal cost of the vehicle but declined. The failure mileage was approximately 12,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11494584November 22, 2022
FUEL/PROPULSION SYSTEM
Fuel management system requires an add on to keep system from functioning improperly. Lifters making loud tapping sound
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11494516November 22, 2022
SERVICE BRAKES, ENGINE, POWER TRAIN
Going under 15mph, applying the brake causes the pedal to become stiff and lock up and not work. This has caused me to almost hit someone in traffic. I immediately got off the road and got my vehicle to a safe location off the road . Communicating with a dealer today to confirm possible recall issue or potential repairs.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11494542November 22, 2022
POWER TRAIN, TIRES, SUSPENSION
The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undetermined speed, the vehicle was shaking while shifting gears. The contact stated while shifting from four cylinders to eight cylinders, the rear-end was shaking violently. The hood latch warning light was illuminated. The vehicle was taken to the local dealer where it was diagnosed and determined that the tires needed to be replaced. The tires were replaced three times however, the failure persisted. The manufacturer was not contacted. The failure mileage was approximately 50,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11494359November 21, 2022
SERVICE BRAKES
The contact owns a 2022 GMC Sierra 1500. The contact stated while pulling a trailer and driving 45 MPH, another vehicle entered his lane spontaneously, he depressed the brake pedal; however, the vehicle failed to stop. The contact stated that the “trailer brakes disabled/service required” warning light was illuminated. The contact was able to quickly maneuver to the right to prevent an accident and continued depressing the brake pedal forcefully to stop the vehicle. The contact was able to continue driving to his residence. The contact took the vehicle to the local dealer but was unable to find a fix for the failure. The vehicle was not repaired. The contact stated that he continued to experience the failure. The contact took the vehicle to a second dealer: Scenic Chevrolet Buick GMC (2300 Rockford St, Mt Airy, NC 27030: (336) 429-5457) however, the mechanic was unable to find a repair for the failure. The vehicle was not repaired. The contact stated that he continued to experience the failure. The manufacturer had been informed of the failure. The failure mileage was approximately 1,200.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11494423November 21, 2022
SERVICE BRAKES
I bought the truck to pull a trailer and the truck is equipped with a max tow package. When pulling a trailer after a short distance a warning comes on a says the trailer brakes have been disengaged. I have had it to two GMC dealers and they refer me to a GM PIT5948A. C159C document and is says there is no fix. I bought the truck to tow and it is unsafe to do so.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11494475November 21, 2022
ELECTRICAL SYSTEM, STEERING
The trucks power source starts failing when going at about 15 mph and turning a bit, it happens when coming to a stop or when you’re about to park. The steering wheel starts getting super stiff and all the power buttons and lights start going dim and the truck shuts off. The truck can turn on right after but at times it takes about 15 minutes for the system to reboot and then the truck will finally turn. When this happens you can’t turn on hazard light making it a dangerous situation at night! I’ve talked to other gmc owner with the Denali models and they have stated as well that they’ve had the same issue occur at least once to them, this truck currently does it very often and even more in the cold weather! There has been a recall on earlier an earlier year of the same model truck but just not this one making it tedious to try to get it fixed. I’ve took it to the mechanic and they’ve changed the ground wires, it made the problem just happen less frequently, but it still occurs.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11494299November 20, 2022
POWER TRAIN
Transmission engine light on, code P0700, P182E. Truck went into limp mode, would recognize what gear its in. Had to shut down vehicle for 10 minutes, restarted then it aloud me to drive.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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