GMC Sierra Complaints

15,732 consumer complaints on file.

#11655399April 18, 2025
ENGINE AND ENGINE COOLING, FUEL SYSTEM, DIESEL, POWER TRAIN
The contact owns a 2020 GMC Sierra 2500. The contact stated that the vehicle was under NHTSA Campaign Number: 24V797000 (Power Train) and the vehicle was repaired. The contact stated that after the recall repair, the transmission started shifting hard. The vehicle was taken to the dealer, and the contact was informed that the transmission module would reprogram and adjust independently. The contact stated that a week later, while driving approximately 45 MPH, the vehicle started to run rough, and the message engine power reduced was displayed. The transmission fault, parking brake system alert, service parking brake, and the check engine warning light illuminated. The vehicle was towed to the dealer, who diagnosed the vehicle and determined that the fuel injector was open, causing high resistance in the connector for cylinder #4. The transmission could not be diagnosed until the injector was repaired. The manufacturer was informed of the failure and opened a case. The failure mileage was 125,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655401April 18, 2025
POWER TRAIN
When shifting down to a low gear at an abrupt stop the transmission will hit hard causing vehicle to brake harder and has almost gotten in accidents because it seems to push itself a bit.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655406April 18, 2025
POWER TRAIN
The contact owns a 2015 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the transmission was difficult to shift into gear, with the check engine warning light illuminated. The vehicle was taken to an independent mechanic but was not diagnosed or repaired. The dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 144,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655414April 18, 2025
ENGINE
While driving on a mountain highway pulling a light duty trailer coasting downhill, the truck went into Nuetral and lost all power. There was no warning lights or messages prior to failure. The display showed "Unable to shift under current conditions". Luckily I was in the right lane and had enough momentum to be able to coast into a breakdown lane on a slight grade with my trailer. The electronics still worked, but the engine would no longer turn over or shift into gear. Had the vehicle towed to the dealer I bought it from and the tech said the engine will need to be replaced. I was lucky this did not cause a catastrophic failure while driving at highway speeds and was able to bring the vehicle (and trailer) to a stop safely. There is already an open investigation against this problem on the NHTSA website, and the claims look very similar to my experience.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655419April 18, 2025
ELECTRICAL SYSTEM, EXTERIOR LIGHTING, VEHICLE SPEED CONTROL
Total loss of power while in motion on highway going 70 when first happened, got video of problem for shop while going lower speeds. Truck will loose all power the dash will turn off and then turn back on sometimes the engine will cut out completely.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655438April 18, 2025
ENGINE
The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving 40 MPH, the vehicle failed to respond as needed. There were no warning lights illuminated; however, the message to shift to neutral and press the start button was displayed. The contact parked and turned off the vehicle; however, the vehicle failed to restart. The vehicle was then pushed by another vehicle to a dealer, where it was diagnosed and determined that the engine had seized. The vehicle was not repaired. The manufacturer was made aware of the failure and offered to pay a portion of the cost of the repair. The failure mileage was approximately 82,346.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655469April 18, 2025
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
The contact owns a 2019 GMC Sierra 1500. The contact stated while the vehicle was parked, the driver's side tail pipe flange bolts connecting the tail pipe and the muffler snapped, causing the tail pipe to hang down. There were no warning lights illuminated. The contact had gone underneath the vehicle and saw that the muffler was disconnected from the tail pipe and that the exhaust bolts had snapped. The dealer was contacted, and an appointment was scheduled to have the vehicle repaired; however, the vehicle was not yet repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 107,105.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655479April 18, 2025
ENGINE
Had the car since 2021. Recently started shaking while driving over 45 mph. Took the car in gmc dealership where they told me it’s an engine issue and need a brand new engine. How would I need an engine having the car for 4 years? And there is no recall?
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655482April 18, 2025
ENGINE
Second engine failure in 8 months. 1st with 97k miles and last after 15k on a brand new 6.2L engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655486April 18, 2025
ENGINE, POWER TRAIN
Engine had already had a full replacement within the first 35,000 miles. Driving down the road at 55 MPH and engine stops completely. Have to coast into a neighborhood. Luckily I was able to get out of the road. Pulled over and turn the truck off. Tried to start it and it never would turn over. Came back an hour later to see if it just needed turn off for a bit and restarted. Tried to start it and it started right up. Drove it around the block and then decided to drive to an auto store to test the battery. Before I could get to the store the truck shut off again while driving in the middle of the busiest road in town during rush hour traffic. Had it towed to the dealership and they said I need an engine replacement. This 6.2 motor is completely unreliable and a hazard to anyone driving it. No warning lights, no indication it was going to fail. I keep up with all my maintenance. I drive under control and at the speed limit and I don't tow anything.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655497April 18, 2025
ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER
Odometer Fraud. The contact purchased a 2011 GMC Sierra 1500. The contact stated that while attempting to register the vehicle, it was discovered that there was a mileage discrepancy. The vehicle was a private sale. At the time of purchase, the mileage was 119,000, and at the time of registration, it was discovered that the mileage was 128,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655506April 18, 2025
ENGINE
My 2023 GMC Sierra 1500 AT4X with 25,000 miles equipped with the 6.2L V8 engine, has experienced engine issues and total failure. Dave Sinclair a GM dealer in St. Louis Missouri indicated that bearing failure and lower lifter defects led to engine seizure, engine failure and block damage. This resulting in the need for a new/ replacement engine. I brought my GMC into Dave Sinclair service center on 2-11-2025 due to engine knocking and loss of power, then on [XXX] experienced complete engine failure and total breakdown on [XXX] resulting in traffic risks and issues. No warning lamps or messages. I routinely have the vehicle maintained at Dave Sinclair per their recommend mileage/time. As of 4-18-2025 I've not receive a replacement engine. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655539April 18, 2025
ENGINE
The motor blew up Safety I was going approximately 70 mph on interstate 80 could have been bad The vehicle is at a Chevy dealer The dealership has looked at it but has no idea when a new motor will arrive About a week before the ck oil light came on maybe a month prior to that when sitting at a stoplight, the motor started to shake
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655159April 17, 2025
ENGINE
Engine oil coolant lines leaking at crimped fittings. Known problem on 2019 GMC Sierra Pickups 1500, under customer satisfaction program N212326940, known to affect in areas of very cold temperature weather, North Dakota where we live is extremely cold -45 deg F in winter. Risk of total oil loss and engine failure. Dealer replaced lines with no reduction in price for a known failure. Warning leaking oil on my driveway, filled engine, scheduled appointment and dealership replaced lines at full cost. This program to replace the lines at no charge should apply to all 2019 GMC 1500s that develop the leaks.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655169April 17, 2025
ENGINE
Vehicle was purchased new in December 2023. In January 2024, with 110 miles on the vehicle the engine blew. Took over a month to get a new engine installed. In March 2025, with 14,500 miles on the vehicle, the engine blew again, This time i was traveling on a busy New York parkway with my [XXX] grandson. Luckily i was able to coast off the parkway without incident. I am now still awaiting a third engine to be installed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655210April 17, 2025
SERVICE BRAKES, ELECTRICAL SYSTEM, ENGINE
Engine has seized twice, completely shutting down without electrical power or brakes. The vehicle also shut down in an intersection (no power, brakes, flashers). I was able to pull to the side on the 2 engine seizures but not during the electrical shutdown at the intersection in the turn lane. The engine was replaced the first time by Quality GMC in Albuquerque, NM. The 2nd engine is being replaced by Diamond GMC in Palmdale, CA. Warning lamps on the 1st engine seizure was tire pressure warning. The electrical shutdown was forward collision warning, emergency braking, etc. The 2nd engine seizure said something about engine needed to be restarted.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655217April 17, 2025
POWER TRAIN, ELECTRICAL SYSTEM
Shift to park message displayed while attempting to shut off engine after shifter was in the park position, accessory would not turn off even after driver door opened and could not leave vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655245April 17, 2025
ENGINE
Engine failed and it is available for inspection upon request The engine started coasting down a major highway and it put myself and others on the road at risk. The dealer has confirmed that this 6.2 L engine has been giving the dealership problems with these GMCs. The vehicle has only been inspected by the Dealership. The Warning Message stated that I needed to restart the engine; however, you can't do that on a major highway due to pressing the break. The vehicle was already on; however, the engine was not connected. No other symptoms were happening prior to the incident. The engine trouble appears only at this incident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655287April 17, 2025
ENGINE, POWER TRAIN
July of 2023, lifters failed on left side of engine. Lifters replaced and cam shaft replaced. January 2025, lifters failed on right side of engine. Replaced. March 2025. Engine seized on interstate. Truck lost all power while driving, no warning signs prior. Dealership has no rental vehicles and we are not old enough to rent from a third party company so family had to drive 9 hours to our location so we wouldn’t be stranded. Three times this truck has failed us. GM is putting in a new motor as it’s still under warranty, but the new motor has no additional warranty. So basically this new motor will be warrantied for less than 7k miles. They cannot say if the new motor has the remanufactured lifters or not. So we could be facing the same exact issues. Can’t ever get ahold of anyone directly though GM.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655311April 17, 2025
POWER TRAIN
I had complete engine failure due to rod bearing failure resulting in the engine locking up and leaving me stranded on the road in 20° weather while waiting 2 hours for a tow truck. My safety was in jeopardy when this happened due to the extreme cold and being stuck on the side of a very busy highway. There was no warning and no warning lights on the dash prior to the engine failure. The engine in my truck is the L87 which is GM’s 6.2 liter V8. Once the truck was towed to the dealership they told me it was completely locked up and the needed a complete engine replacement that took over 8 weeks. Dealership told me the seized engine would be sent back to GM so they could inspect it for causes on why the rod bearings failed resulting in the seizure of the engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to GMC Sierra