GMC Sierra Complaints

15,732 consumer complaints on file.

#11772979October 22, 2026
ENGINE
Severe Engine Knock
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773054October 22, 2026
STRUCTURE:BODY
Upper grille deflector broke off without impact at highway speed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773082October 22, 2026
STRUCTURE:BODY
Recall n242490120 was corrected on 6/10/25. Grill has since blown off while driving ,couldn’t retrieve it, and caused a chip on my windshield. Recall was for front grille deflector. Dear Learship that repaired it said they were only authorized once to repair and it would be out of pocket expense to repair again.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772603October 21, 2026
POWER TRAIN
Purchased this 2022 GMC AT4 2500HD in 2022. Drove off the lot and traveled 40 miles home. Got hom,000e and pulled out of my driveway and noticed terrible bump in second gear I believe. Notified dealer and returned truck for them to replace 2 valve bodies. One week later the truck experienced terribel bumps in a downshift fashion at slow speeds, like it's downshifting from 3rd to 2nd gear. Returned truck and they replaced transmission. Problem improved some but now with 48,000 miles if your in slow speed downshifting world around 10 mph, it will lock up or hard bump that makes you think you've hit someone in front of you when you're in heavy traffic. It's been doing this at random times since new tranmission was installed. It feels like a lock-up situation. No indicators or messages show up on vehichle. I've made several compaints to dealer with no luck to this point.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772611October 21, 2026
ENGINE
I had driven about 30 minutes on the Interstate at highway speeds and had just exited the Interstate and the truck made a horrible noise, shut off, and the transmission threw itself into park at about 10 mph. At this time, the engine did not want to restart, but did eventually and I had a check engine light on, but I was able to move the truck out of the intersection so that I could be towed to the dealership. Prior to the incident, there were no check engine lights and the vehicle had only been serviced at a GMC dealership. I was very uncomfortable with the way the truck stopped and slammed into park. I am happy that no one was behind me, but it could have been bad. The vehicle has not been inspected yet to my knowledge.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772613October 21, 2026
BACK OVER PREVENTION
The contact owns a 2023 GMC Sierra 1500. The contact stated that while the vehicle was in reverse(R), the rear-view camera froze and occasionally glitched. The failure was a recurring failure. The contact associated the failure with Technical Service Bulletin: PIT6369B. The dealer was contacted. The manufacturer was contacted and made aware of the failure. The failure mileage was approximately 60,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772673October 21, 2026
POWER TRAIN
The 6-speed automatic transmission (6L80) developed a severe shudder during normal driving. A service center diagnosed the problem as torque converter clutch failure; the torque converter sheds metal debris through the transmission, so the transmission now requires a full rebuild quoted at approximately $6,000. The failure occurred at approximately 92,000 miles in October 2026 (incident date is approximate). This is a widely documented failure pattern on GM 6L80 transmissions. Loss of reliable power delivery from the transmission is a safety concern. No crash, no injuries, and no fire occurred. The vehicle is available for inspection upon request.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772682October 21, 2026
UNKNOWN OR OTHER
The engine was part of the initial recall for the L87 GM motor and failed its inspection. Ultimately the engine had to be replaced. Since, the engine was replaced everything was fine till recently it starting to make a knocking noise and was immediately taken to a GM dealership for diagnosis. Currently, waiting for final decision on the fix, but preliminary the dealership stating its the lifters or camshaft.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772705October 21, 2026
ELECTRICAL SYSTEM, ENGINE, POWER TRAIN
While driving the truck it randomly shuts down, message on dash says shift to park to restart. No check engine light comes on or any other message. When it does this, the truck goes into park. It has been to the dealership 3 times and has not been fixed!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772753October 21, 2026
UNKNOWN OR OTHER
Transmission control valve real,rear wheels can lock up causing accident recall # 26V083000
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772806October 21, 2026
ELECTRICAL SYSTEM, ENGINE, POWER TRAIN
The engine locked up and stalled out while driving. GM replaced engine but still experiencing issues. Dealer has admitted that they will likely recall my model year since it is an ongoing and same issues as recalled trucks. I have a vehicle I am not confident in nor safe it since it stalled while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772830October 21, 2026
ENGINE
Engine locked up while driving down the road at highway speeds. Lost all power and had to pull to shoulder of road. Was towed to dealership and confirmed engine locked up and covered under special recall. Was looked at a few months back and passed the recall test on engine. No lights or signs of engine failure before failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772422October 20, 2026
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
Engine lost power and is smoking profusely. An independent service center told us there is a problem with one or more of the cylinders. No, there were no warning lamps. It's here, but we can't drive it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772486October 20, 2026
POWER TRAIN
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at 55 MPH, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact became aware of an abnormal sound, and the check engine warning light was illuminated. The vehicle was driven to the shoulder of the road. The contact inspected the vehicle and connected a portable diagnostic tester to the vehicle. The contact retrieved a pressure fault code. The vehicle was taken to the dealer, where it was diagnosed with a torque converter shudder. Additionally, the solenoids were clogged with debris. The contact was informed that the transmission needed to be replaced. The manufacturer was contacted, and a case was filed. The failure mileage was approximately 106,554.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772532October 20, 2026
ELECTRICAL SYSTEM
Vehicle experienced a complete loss of audio, to include warning chimes, bluetooth audio, radio, and blinker on/off notification warning. This can be a serious issue because without hearing the click notification That your blinker is on, another vehicle may think you are turning and pull out in front of you, possibly causing a serious crash
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772316October 20, 2026
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
My 2021 GMC 1500 Sierra has the 6.2L motor that has significant known issues with catastrophic engine failure involving the camshaft and lifters. The engine in my truck has suffered the same failure but for some reason my VIN is not included in the recall of nearly 600,000 GMC trucks. I called GMC Customer Service and was told bluntly the recall was VIN specific and I would have to bear the 14,000 dollar repair. This is unacceptable since GMC is under federal investigation for knowingly and negligently manufacturing a flawed motor.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772324October 20, 2026
ENGINE, FUEL/PROPULSION SYSTEM, UNKNOWN OR OTHER
Recall N262576260 has just come out. My truck has the same symptoms/conditions consistent with the recall. I have a code P0420, check engine light, high oil consumption and loss of power. also, the GM representative i spoke with told me i have an open recall N242450631. it does not show on the NHTSA website and it does not show at the dealer. the high oil consumption has allowed the turbo to damage the catalytic converter and something in the engine to tap due to less lubrication.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772347October 20, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2023 GMC Sierra 1500. While driving at 30 MPH, the vehicle jerked and lost motive power. The vehicle was restarted and driven at reduced power to the dealer, where unknown electrical repairs were performed. The failure persisted, and the vehicle was towed to a second dealer, Grissom Chevrolet (181 S Interstate 20 Frontage Rd, Pecos, TX 79772), who replaced the engine. However, the failure recurred, and the vehicle was towed back to the first dealer, who diagnosed that the spark plugs and other unknown parts needed to be replaced. After the dealer performed the unknown repairs, the check engine warning light illuminated when the contact's son-in-law picked up the vehicle. The contact's brother, an independent mechanic, diagnosed that the catalytic converter and other unknown parts needed to be repaired. The contact filed a lemon law claim. The manufacturer was notified of the failure by phone. The failure mileage was approximately 50,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772037October 19, 2026
UNKNOWN OR OTHER
While driving, the vehicle audio system intermittently loses all sound for approximately 1-2 seconds. During the audio loss, entertainment audio, turn-signal click sounds, and vehicle warning chimes all disappear simultaneously and then return. Vehicle is currently running infotainment software version 662.11. Issue occurs while driving and has happened multiple times. Concern is that loss of warning chimes and turn-signal sounds may reduce driver awareness of safety-related notifications. During complete audio loss (Blinkers, chines, etc), vehicle needs to be shut off for several minutes to recover audio loss.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772042October 19, 2026
STRUCTURE:BODY
I was driving 65 MPH on a one lane highway, right when someone went by in the other lane. My front hood moulding (hood trim piece) flew off and hit my windshield. Then drug across the cab of the truck before landing in the road. This debris was now in the road causing other people to have to swerve to miss it. I turned around and put my hazards on and grabbed it from the middle of the road. This caused other motorists to stop in the roadway for me or go into the oncoming lane of traffic to go around me. The service center from the dealership I bought it at said I would have to bring it in for estimate and didn’t confirm if others have had this same issue. This happened one day ago and it has not been inspected by anyone. There was no warnings of any kind. I didn’t notice it shaking prior or anything, it just abruptly flew off.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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