GMC Sierra Complaints

15,732 consumer complaints on file.

#11724462March 15, 2026
TIRES, TIRES:TREAD/BELT, TIRES:SIDEWALL
Traveling on I-10 doing approx 75 mph head a loud boom and saw sparks coming from the read drivers side of the truck. Truck was riding a bit low on that side. Pulled over and determined the tire had blown up. Currently doing the insurance claim and repair as there was substantial damage to the truck. No crash or involvement by other motorists. Did not hit anything.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11724478March 15, 2026
ENGINE
Oil cooler blew and mixed oil in coolant reservoir. Possibly causes overheating and engine seizure. This has been confirmed with a certified GM service center. The service center inspected fixed it then within 5 miles had to be returned to the dealer because it happened again.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11724264March 14, 2026
ENGINE, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
I am the owner of a 2026 GMC Sierra 1500 Denali Ultimate equipped with the 6.2L V8 L87 engine (VIN: [XXX] ), purchased new approximately three months ago. I am filing this complaint proactively. I have experienced no engine failure or symptoms to date. However, I am filing based on a documented pattern of L87 engine failures in 2025 and 2026 production vehicles, confirmed by multiple GM dealership technicians, which suggests that the manufacturing defect underlying NHTSA Recall 25V-274 may not have been fully resolved by GM’s stated production improvements dated June 1, 2024. NHTSA Recall 25V-274 (April 2025) covered 597,630 vehicles from model years 2021–2024 for catastrophic L87 engine seizure caused by connecting rod bearing failure and crankshaft defects. GM excluded 2025 and 2026 model year vehicles based on a claimed manufacturing fix. However, multiple 2026 production vehicles have since experienced the same bearing failure at extremely low mileage. Open NHTSA Investigation EA25007 is already examining vehicles outside the original recall window, and Recall Query RQ26001 is investigating the adequacy of GM’s remedy. I am requesting that NHTSA consider expanding the investigation scope to include 2025 and 2026 model year vehicles. As a 2026 owner of a $90,000+ truck with the identical engine configuration, I believe my vehicle warrants inclusion in any expanded investigation or recall action. 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
#11724321March 14, 2026
ELECTRICAL SYSTEM
2022 gmc sierra The tailgate is electrical which cause safety awareness and concern due to the tailgate opening by itself. The tailgate seems to continuously electronically open and continue to release the latch causing the tail gate to open possibly loosing cargo from the bed or tailgate opening and hitting other vehicles that may park too close or cause damage on a hitch if available. It is a persisten issue and I have seen too many complaints. This should be looked at and recalled by manufacture or dealers it’s become a very common issues for gmc trucks and a lot of upset customers. I’m one of them.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11724011March 13, 2026
SERVICE BRAKES, POWER TRAIN, STEERING
Vehicle experienced a catastrophic mechanical failure characterized by a percussive "shotgun blast" noise from the rear chassis, followed by an immediate, total loss of braking power (pedal to the floor) and a violent loss of directional stability. This incident represents an aggravated safety failure of known GMT900 platform defects. The technical chain of causality began with the factory exhaust manifold fasteners suffering a metallurgical shear, a universal defect documented under GM Bulletins 19-NA-218, PIP5075, and PIP4701. This shear created a high-velocity, high-heat exhaust leak directed at the brake master cylinder and vacuum assembly. This "heat soak" event compromised the engine-mounted mechanical Brake Vacuum Pump (Recall N192268490 / NHTSA 19V645) and destroyed the internal seals of the Master Cylinder (Special Coverage 15143 / NHTSA 11V599), resulting in total depletion of vacuum assist and hydraulic pressure. Simultaneously, the "shotgun blast" and violent swerve were caused by structural failure consistent with Rear Brake Caliper Bolt Fracture (GM 13247 / NHTSA 13V342) and Rear Axle Shaft/Pin Fracture (GM 14892 / NHTSA 14V819). This mechanical collapse caused the caliper to strike the wheel, resulting in a catastrophic rim blowout and immediate loss of tire pressure. Despite the vehicle having aftermarket long-tube headers installed, the root cause of the heat-related brake failure was the failure of the OEM GM manifold fasteners which snapped off in the cylinder head, as documented in the aforementioned bulletins. Under the Magnuson-Moss Warranty Act, the manufacturer remains liable for these pre-existing safety-critical defects. The vehicle is at Glenn Polk Chevrolet for a 901-series Product Allegation Investigation (Case #90199492). This report is filed to demand federal oversight into these life-threatening defects. The combo of failed fasteners, rim blowout, and compromised braking created a vehicle that was both unable to be steered or stopped
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11724048March 13, 2026
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
While driving down the highway experienced a partial loss of engine power causing jerky/rough operation, harsh shifting, and unpredictable behavior. Was told by the dealer service manager that it was likely a misfire in one of the cylinders. After diagnostics and servicing that included changing spark plugs, wires, and a full engine service it was later confirmed to most likely be due to a stuck lifter and will require a complete engine replacement. I have subsequently learned that this is a common problem with this L87 engine and may be an early indicator of failing crank bearings associated with a recall for later model years of my same vehicle. Seems to me that recall ought to be expanded to include earlier models with L87 engines.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11724149March 13, 2026
ELECTRICAL SYSTEM, ENGINE
I was driving the truck on the freeway and the engine completely shut off with no warning. I pulled to the side of the shoulder and I could smell a burning smell. The truck wouldn’t start back up or move in neutral. Towed it to a shop and they said it had a camshaft issue and a slight knocking noise when they got it to fire up only would run for a little then shut back off. Now I’m having to replace the whole engine due to being bad with the cam code and knocking.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11724160March 13, 2026
ELECTRICAL SYSTEM
UI Bulletin #161b is for years 2020 and beyond. But my 2019 is having the same exact issue and the GM dealer will not cover the work as stated in the UI Bulletin #161b
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11724209March 13, 2026
STRUCTURE:BODY
front upper grille trim violently ripped off while driving down the highway. hit windshield and flew up and over the car into traffic on the highway.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723796March 12, 2026
ENGINE
Driving down the Interstate 35 in Tarrant County, Texas. Engine locked up. Towed to dealership. Dealership determined that engine is locked up. Had dealership verify oil level was okay and they confirmed that it was. Oil had been services two weeks ago. Engine is a 6.2 L but not the L87 block. Milage on the vehicle is 149,752.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723825March 12, 2026
ENGINE
Engine with leas than 40,000 miles is consuming one (1) quat of oil every 2,000 miles. GM dealership showed me the internal GM service update stating the accepted rate of oil consumption for engines uses in the vehicles referenced is 1qt per 2,000 miles. That may seem acceptable because GM put it in a notice to dealerships but I assure you the end consumer would never buy this engine if this was explained prior to purchasing. There is a reason new cars to not consume oil (at least not at a level you need to add oil between oil change intervals) at this rate. Long term wear and tear on the engine - note Gm offered a warrantee covering 100,000 miles, which is nice but the problems will become more severe over time and miles. I consider this borderline criminal as it will surely cause engines to lock up.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723896March 12, 2026
ELECTRICAL SYSTEM
The backup camera is too bright at night and therefore useless . Tried searching the web but found no fix that would actually work. Took my truck to the dealer and they never heard of this issue even though there are numerous articles about it on the world wide Web.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723492March 11, 2026
ENGINE, POWER TRAIN
My engine makes a rattling noise intermittently, misses, and surges. The transmission has shuddered and shifts hard randomly. The transmission has stayed at 2-plus rpm for well over two minutes. All this happens at random times. I have shown videos to my dealership, which did no good because they couldn't replicate it. I have had GM's so-called fix with changing the oil and software updates, which still haven't fixed any of my issues. I've been in contact with the main GM over these issues, and no one has seemed to care. They did scan the vehicle, and the only code it showed was a loss of signal to the transmission control module, which I assume fixed itself, because they did nothing further.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723512March 11, 2026
ENGINE
Engine shut off while driving and steering wheel wouldn’t let me turn and I drove up on a curb into someone’s yard , There should be a recall on these trucks with the 6.2L in the year 2019, this is very dangerous I could of injured myself on injured someone else. This needs to be addressed!!
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11723523March 11, 2026
ENGINE
The engine locked up 2 months after recall inspection. There was no lights or warnings. Towed into dealer, they inspected it and said lower end failed. Dealer replaced engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723524March 11, 2026
ELECTRICAL SYSTEM
The gauge cluster quit working, I have no way of knowing my speed or how much fuel is in the vehicle. Feel like this is a safety issue with not being able to see the speedometer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723547March 11, 2026
UNKNOWN OR OTHER
Rear glass window shattered due to the defroster getting too hot. Some smoke was noticed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723636March 11, 2026
ENGINE
Vehicle burns approximately 1 quart of oil every 1000 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723657March 11, 2026
ENGINE, STRUCTURE
The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated that while driving at an undisclosed speed, and while the vehicle was parked, the running boards unexpectedly lowered. Additionally, there was oil leaking from the vehicle, and the check engine warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed with camshaft failure. The contact was informed that the camshaft needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 107,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723707March 11, 2026
ENGINE
February 28th 2026, I was driving on the highway with my children and suddenly without any prior warning my cars check engine light came on. It immediately starting losing power, made a knocking noise, and sounded like it was misfiring. Fortunately I was able to make it safely off the highway and have my car towed to the dealership. This was most definitely a life threatening situation which no one should have to face. The dealership dismantled my engine and i was advised the engine had an internal failure due to the valve lifter , rods , and camshaft damage. When looking online there are many complaints and lawsuits regarding this investigation of GMC’s 5.3 engine. I believe this was due to catastrophic damage of the components and there needs to be a recall regarding this issue. The car has always been properly serviced and regular oil changes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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