GMC Sierra Complaints

15,732 consumer complaints on file.

#11646249March 4, 2025
ENGINE
Engine failed and had to be replaced. GMC was absolutely no help had to bring to local gas station where i had to pay almost $12,000 to get it fixed. The truck has been in shop frequently for oil issues with this motor but GMC just jerks you around. I am in sales and need my vehicle to support my family
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11646347March 4, 2025
ENGINE, POWER TRAIN
The contact owns a 2022 GMC Sierra 1500. The contact stated that while her husband was driving 30-35 MPH, the vehicle stalled. No warning lights were illuminated. The contact's husband was able to pull over onto the side of the road. The contact's husband attempted to restart the vehicle, and the vehicle failed to restart. The vehicle was towed to the dealer where it was diagnosed and determined that the engine had seized and needed to be replaced. The contact's husband stated that the tow truck driver could not move the gear shifter into neutral(N) when the vehicle was being towed. The vehicle was not repaired. The manufacturer was notified of the failure. The vehicle remained at the dealer and had not been driven since. The failure mileage was 81,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645901March 3, 2025
ENGINE, FUEL/PROPULSION SYSTEM, UNKNOWN OR OTHER
Cylinder 5 failure and cam shaft miles 78k. Have to replace full top end or brand new motor cost $10k up to $13k to fix at dealer
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645790March 2, 2025
POWER TRAIN
Bad torque converter with 56000 miles and a month out of warranty and GM says to bad.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645829March 2, 2025
ENGINE, SERVICE BRAKES
I was traveling north on interstate 95 and approaching my exit ramp. I was initially in the inside lane of travel. I accelerated to merge into the outside lane, between two other vehicles, and then onto the exit ramp. Once on the exit ramp, I let off of the throttle and the engine suddenly shut down. I noticed a message on driver information center instructing me to shift the vehicle into neutral and press "start again". The engine had shut down without any warning whatsoever. I complied with the instructions to no avail. The truck is over half full of fuel. I was within an hour of home after completing an approximately 8 hour, 500 mile, round trip over 2 days of driving. After this event, I connected an OBD2 scanner and the only code found was P25A2 brake system control module. I placed the truck in park and tried repeatedly to start the engine. It would not turn over, crank or start. I had power to all systems and no other codes. I had to have the truck towed from the scene. The truck's performance had previously been flawless during this entire trip and had given me no warning whatsoever of the sudden engine shutdown. This is extremely dangerous and a safety concern.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645862March 2, 2025
ELECTRICAL SYSTEM, BACK OVER PREVENTION: WARNINGS, STRUCTURE:BODY
Vehicle was parked in a school parking lot. Rear Trailer Harness and modules in back short circuited causing an electrical fire that expanded to the driver’s taillight rear bumper, and bed of truck.
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0
#11645731March 1, 2025
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
Engine catastrophic failure while under extended warranty. Engine failed in February of 24 however I had told dealership I was having troubles with Engine and shifting also tires from 1st 11000 miles it also kept reduce power on me and basically shut down 3 times in middle of hwy. The 6.2 engine locked up on the mechanic who was test driving it. Took 3 months
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645744March 1, 2025
ENGINE
Driving at 55 mph and my 6.2L engine stalled and seized up. Had it towed to GMC dealership and the verified it had seized.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645490February 28, 2025
FUEL/PROPULSION SYSTEM
I was towing my 44'camper entering the highway and during excellration there was a loud bang and the truck shuddered no lights on the dash. Pulled over and did a visual check of the vehicle and did not see anything out of ordinary. Continued on our journey and during the the week noticed clunking noise when shifting into park and into drive with no camper. We shortened our trip and returned home with no futher incidents. Received recall letter from GM in December, called the dealer and was told Gm has not released my VIN number yet. Called twice in January 2025 and the software was done on February 20, 2025. Truck seems to run as it should. I use the truck for business and to tow my camper. The software is only a patch. My fear is I'm out traveling with my 44' camper and the truck goes into limp mode limiting to fifth gear. Then I have to get the truck towed home and the camper. I travel with 3 dogs too. GM has known about this issue and has failed to fix the problem leaving me and my family at risk of a serious accident. I can not work without my truck and GM does not care about me or my family. I have several camping trips scheduled for this year and I'm considering canceling them because I don't feel comfortable with the software update.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645653February 28, 2025
ENGINE
At 9,100 miles my 2023 pickup truck experienced engine failure. It was inspected by dealership in the town where truck was purchased and it is determined that it will need a new engine due to "bearing failure". This occurred 2/24/25. No indicators or warning messages appeared.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645656February 28, 2025
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
Hi, I was driving on [XXX] and my radio volume went to full volume 100% by itself. The radio would not shut off and none of the controls would work, everything froze. I kept turning the volume button down and the volume bar on the screen showed that it was trying to minimize, but it wouldn't stay. It kept going to full volume. Finally, after I kept pushing the off and mute buttons, the radio shut off and was unresponsive. When I reached my destination and shut the truck off and restarted it, the radio then worked as it normally should. This happened to me yesterday, and I'm still having trouble hearing and my ears hurt. I researched this online and found that there are many other people that had this same scenario with their sierra. I wanted to reach out and report this. Thank you [XXX] 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
#11645665February 28, 2025
POWER TRAIN, ENGINE
Subject: Complaint Regarding Recurring Engine Failure in 2021 GMC Sierra AT4 Dear National Highway Traffic Safety Administration, I am writing to formally express my concern regarding recurring engine failures in my 2021 GMC Sierra AT4 (6.2L engine). At 23,000 miles, the vehicle suffered a complete breakdown due to failure of cylinder #8, lifters, and push rods. General Motors covered the repairs at that time. However, at 97,000 miles, the exact same issue reoccurred, resulting in significant engine damage. The dealership diagnosed a misfire in cylinder #8, leading to the removal of the right cylinder head, where they found a bent push rod, spun lifter, damaged camshaft lobe, and lifter roller. The repair estimate totals $9,746, but GM has refused to cover the costs, despite us having an extended warranty purchased from the dealership. This recurring failure raises serious concerns about engine reliability and manufacturing defects in General Motors vehicles. I urge the NHTSA to investigate this issue, as multiple GMC and Chevrolet owners have reported similar problems with the 6.2L engine lifter and camshaft system. This is not just a costly repair but a potential safety hazard that GM has failed to properly address. Thank you for your attention to this matter. I appreciate any guidance or action the NHTSA can take to hold GM accountable and ensure consumer protection.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645667February 28, 2025
ENGINE
AFM lifters failed which caused cam shaft to collapse under 35k miles. Had to remove while front end to repair
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645466February 28, 2025
UNKNOWN OR OTHER
While using reverse camera system has burly image and grid lines in front and rear are missing with a light blue hour glass showing in the top left corner.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645470February 28, 2025
ENGINE
My Vehicle went into the dealer on January 21, 2025. My initial complaint was tapping noise, I was advised that my vehicle had collapse lifters issue several days later I was informed that they have found metal shards in the lower end and found a bad crank bearing and crank. I was told that the vehicle will need an engine replacement, and that the engine is on back order with no date of fulfilment. My vehicle has 66,700 miles I was advised was out of warranty and that GM will only cover half of the estimated cost of 11,000.00.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645480February 28, 2025
ENGINE, POWER TRAIN
While driving at 65 mph, the engine locked up, the truck went into neutral, and all power was lost. This occurred with no warning at all. The truck was towed 40 miles to a GMC dealership for repairs. GMC dealership has indicated that the engine is permanently locked up and will have to be replaced. The dealership did not provide any explanation as to why the engine locked up.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645484February 28, 2025
LATCHES/LOCKS/LINKAGES
The contact owns a 2021 GMC Sierra 1500. The contact stated that the tailgate opened unintendedly while driving, and while the vehicle was parked. The contact stated that the failure had been recurring. The vehicle was taken to the dealer but was not diagnosed or repaired. The contact related the failure to GM Campaign Number: N232426400. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 76,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645207February 27, 2025
ENGINE
Engine failed at 10,000 miles while driving down the road. No warnings, engine shut off while driving. I pulled over and contacted OnStar. They got me a tow truck to bring the truck back to the dealer the next day. I was told that I needed a new engine and they don’t know when they’re gonna get one in. It could be months. I had to pay for a Rent-A-Car out of my own pocket. The dealer would not cover the cost.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645276February 27, 2025
POWER TRAIN
The contact owns a 2020 GMC Sierra 2500. The contact received notification of NHTSA Campaign Number: 24V797000 (POWER TRAIN); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645294February 27, 2025
ENGINE
The contact owns a 2023 GMC Sierra 1500. The contact stated that while his wife was driving 60 MPH, the vehicle came to an abrupt stop, and the engine was seized. There were no warning lights illuminated. The driver was stranded on the highway for approximately two hours. The vehicle was towed to the local dealer, where it was diagnosed that the camshaft bearing had disintegrated. The vehicle was not repaired. The manufacturer was contacted and opened a case. The failure mileage was approximately 22,872.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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