GMC Sierra Complaints

15,732 consumer complaints on file.

#11714043January 28, 2026
STEERING
Loss of power steering while driving
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11714073January 28, 2026
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
Vehicle electrical propulsion system became inoperable creating a hazard to occupants in a temperature control required climate Vehicles visual control showing speed and all other information went completely black while vehicle was in motion.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11714077January 28, 2026
ENGINE, FUEL/PROPULSION SYSTEM, UNKNOWN OR OTHER
I was driving in the high way and the vehicle started having issues and then it completely shut off and wouldn’t drive or anything in the middle of the highway and the dash said it was reducing power.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713737January 27, 2026
STRUCTURE:BODY
Front grill cap blew off while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713767January 27, 2026
SEATS
Seat is squeaking loudly like if its loose or something is loose with it dealership and gm dont want to fix it they expect me to pay to fix something that ahouldnt even be happening on a 2 year old vehicle specially when you pay more than 70,000 dollars for a vehicle to be having this issue
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713533January 27, 2026
ENGINE
Post recall L87 I had a catasrophic engine failure. 70 mph highway engine seized lost propulsion. 38000 miles. No warning, Engine has been replaced by GM
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713545January 27, 2026
ENGINE
Total engine failure at highway speed with loss of propulsion . Catastrophic engine loss with 3,000 miles . GMC never fixed the problem with the 6.2 l87 like they said
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713557January 27, 2026
ENGINE
I was driving on the Oklahoma turnpike @ 75mph when the engine locked up in traffic. I coasted to the side of the road and called roadside assistance. The truck is currently at Vance GMC in Miami, OK getting the engine replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713584January 27, 2026
ELECTRICAL SYSTEM
While driving the vehicle I hit a bump on the road and all 4 windows in the vehicle went down. I did not push any buttons. I tried to close the windows and they would not close. Nothing happened when I attempted to close them. It was 10 degrees out I pulled over, and tried again with out success. I shut the car off, opened the door and closed it and restarted the car after a few minutes. I was able to close 3 of the 4 windows. I started driving and eventually I was able to close the last window. ON my drive I late hit another bump and again all 4 windows opened with out any action by me, I was on a highway, I again pulled over and was not able to close the windows. After I continued driving I was able to close 3 of the 4 windows and eventually the 4th. This is a safety issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713601January 27, 2026
FUEL/PROPULSION SYSTEM, POWER TRAIN, UNKNOWN OR OTHER
This vehicle shudders and vibrates during shifting and acceleration at different speeds. Transmission shifts out of gear quite often leaving me stranded at times trying to make it safely out of traffic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713611January 27, 2026
ENGINE, FUEL/PROPULSION SYSTEM
On November 16, while driving on the highway, my GMC vehicle suddenly lost engine power without warning. I was forced to stop in traffic, creating a dangerous situation and putting my life at risk. The vehicle required towing and has remained at the dealership since that date. The dealership determined that the engine requires replacement. Repairs have been significantly delayed, including an incorrectly ordered replacement engine, and the vehicle remains out of service more than two months later. This defect caused a sudden loss of power while driving and presents a serious safety concern.After the incident, I contacted the dealership immediately. Diagnostic appointments were scheduled and then canceled by the dealership twice, which delayed inspection and repair. I was only able to leave the vehicle at the dealership on December 12 due to these delays.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713634January 27, 2026
ENGINE
On January 15, 2026, my wife was driving our 2019 GMC 1500 Sierra Denali and the lights on the dash came on with the truck losing power. I made to my wife later in the day and was able to drive the truck to the dealership only achieving 15mph for about 5 miles. The Mike Bell Chevrolet Dealership in Carrolton GA stated that my engine was knocking and needed to be replaced. I took my truck the John Thornton Buick GMC dealership on January 22 to get a second opinion and they stated the exact same thing stating the engine needs to be replaced. The dealership is stating the remanufactured replacement issue is over $10,900. My truck has over 271,000 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713638January 27, 2026
ENGINE
2023 GMC SIERRA DENALI ULTIMATE 1500 WITH 6.2 V8 AT HIGHWAY SPEEDS 65 MPH THE CAR LOST PROPULSION AND SAID IT WAS IN NEUTRAL. CAR WOULDN'T SHIFT BACK INTO DRIVE. BARELY MADE IT OFF THE HIGHWAY WITHOUT AN ACCIDENT. CAR WOULDN'T RESTART. CAR BROUGHT TO DEALERSHIP AND WAS TOLD IT NEEDS A NEW ENGINE AND I WOULD BE WITHOUT MY TRUCK FOR A MONTH. CAR CURRENTLY HAS 20,200 MILES ON IT. PLUS NO LOANER CAR. GMC HAS TERRIBLE CUSTOMER SERVICE AND SELLS A DANGEROUS PRODUCT
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713307January 26, 2026
ENGINE, POWER TRAIN, VEHICLE SPEED CONTROL
While traveling 60 mph on a divided highway went to pass another vehicle. Had no throttle response the engine had completely turned off, locked up seized up. I’m not sure what caused the engine to just lose all power. Had to go back to the lane and luckily there was a turnoff where I was able to turn off the highway.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713315January 26, 2026
ENGINE
My vehicle stop running as I approached a traffic signal and failed to restart, it happened at a heavy traffic intersection during morning commute,I had the vehicle towed to Dealership that same day (01-22-2026). Later that evening the dealership called to inform me that the motor was blown and had ordered a new one.the mileage is approximately 39,285.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713333January 26, 2026
POWER TRAIN
I am writing to formally file a safety complaint regarding the ongoing recall of the GMC/Chevrolet 6.2-liter V8 engine and what I believe to be an inadequate and insufficient remedy being provided to vehicle owners. I purchased a brand-new 2023 GMC Sierra AT4 equipped with the 6.2-liter engine. I drive approximately 6,000 miles per year and maintain the vehicle carefully. After receiving the recall notice, I promptly took my truck to an authorized GMC dealership for inspection and repair. The only action taken was an oil change to a heavier-weight oil. I was told that everything was “fine” and that no further action was required. I find this remedy unacceptable given the severity and nature of the reported failures associated with this engine platform. Simply changing to a heavier oil does not address the underlying mechanical risks and does not provide owners with meaningful assurance that catastrophic engine failure will not occur without warning. This issue is particularly serious for me because I rely on my vehicle for my livelihood. I am an account sales executive and use this truck extensively for work travel and customer meetings. If my vehicle were to fail unexpectedly, it could cause me to miss critical business meetings, resulting in immediate financial loss and potentially long-term damage to customer relationships and sales performance. The current remedy provides no confidence that such a scenario will not occur. In addition, this recall has materially harmed the resale and trade-in value of my vehicle. Dealerships are now significantly lowballing trade-in offers because the 6.2-liter engine recall is widely known and prospective buyers are reluctant to purchase these vehicles. Buyers are also aware that any future owner will not receive the benefit of the original powertrain warranty coverage in the same way, further depressing resale value. As a result, I am effectively trapped in a nearly new vehicle that has become difficult to sell or trade due
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713408January 26, 2026
UNKNOWN OR OTHER
I have went to a dealership to try and trade this vehicle in and they have informed me that this vehicles odometer has been rolled back prior to me purchasing it. It was not disclosed to me from Bob Rorhman Hyandia that this had happened.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713486January 26, 2026
ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER
Odometer Fraud. The contact purchased a 2015 GMC Sierra 2500. The contact stated that while attempting to register the vehicle, it was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 189,458 and the contact stated he discovered on Carfax that mileage was 188,052; however, the contact discovered that the mileage was 112,708.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713162January 25, 2026
POWER TRAIN, WHEELS
4 months after bring my truck back to the dealership for a body valve issue on the 10 speed transmission. The truck went into limp mode while I was driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713202January 25, 2026
POWER TRAIN
After 38,000 miles and 8 years of normal service (mix of city, highway, and 10% towing), my 8L90 transmission began to shudder occasionally. The problem first became apparent when driving slightly uphill, on cruise control at about 50 mph, or while slightly accelerating on a flat road, with no load in the box, and no trailer. It felt like I was driving across a rough patch of asphalt or rumble strips. Every half mile or so, it would shudder. Slowing down or speeding up stopped the rumble. The problem proved not to be caused by tires, U-joints, or AFM. The problem in fact was caused by defective GM transmission fluid, which was sold as "sealed for life", and rated for 200,000 miles, as factory-installed. That proved to be BS. If not repaired, this problem would lead to transmission lockup and/or lack of propulsion, which could contribute to a vehicle crash. The problem was solved by installing AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid, Product Code: ATLTP-CA. If GM properly cared for their customers, to make up for false advertising at the time of purchase, GM should publish and pay for GM Service Bulletin #20-NA-142, for all 8L90 owners, instructing owners to replace their transmission fluid every 5 years or 40,000 miles, whichever comes first.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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