GMC Sierra Complaints

15,732 consumer complaints on file.

#11640553February 4, 2025
POWER TRAIN
The transmission would just give out. It also wouldn’t reverse. The cause was a faulty body valve that gm can’t produce fast enough.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640628February 4, 2025
POWER TRAIN
Transmission is shifting rough
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640645February 4, 2025
SUSPENSION, ENGINE AND ENGINE COOLING
The contact owns a 2021 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, there was an abnormal clunking sound coming from the rear suspension. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the rear suspension. The vehicle was repaired, but the failure reoccurred 4,000 miles later. The contact stated that while reversing, the contact heard an abnormal clunking sound coming from the rear suspension. The contact also stated that there was also a strong antifreeze odor permeating the interior of the vehicle. The vehicle was taken back to the dealer, but not yet diagnosed. The vehicle was not repaired. The manufacturer was notified of the failure, and a case was opened. The failure mileage was 38,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640668February 4, 2025
ENGINE
Lifters and cams fatal failure, requiring extremely pricy replacement of the parts affected or replacement of the entire engine!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640707February 4, 2025
POWER TRAIN
The contact owns a 2020 GMC Sierra 2500. The contact stated while driving 63 MPH, and towing a 15,000 lb. 5th Wheel RV, the contact heard the rear wheels make an abnormal squealing or chirping sound. The contact stated that the front end of the vehicle was pulling to the right. The contact adjusted the steering wheel to the left to compensate. The contact stated that the vehicle was losing motive power. The contact stated that the drive(D) symbol was flashing on the instrument cluster. The contact depressed the accelerator pedal; however, the vehicle failed to respond as intended. The contact exited the highway and stopped the vehicle. The contact had the vehicle towed to an independent mechanic. The mechanic scanned the vehicle but did not retrieve any fault codes. The mechanic researched online and informed the contact that the VIN was included in NHTSA Campaign Number: 24V797000 (Power Train) for a defective transmission control valve. The contact was referred to a dealer by the mechanic. The vehicle was not repaired. The contact had the vehicle towed to a local dealer who diagnosed the vehicle and determined that the transmission needed to be replaced. The contact was informed that the transmission was not covered for repairs if damaged while performing the recall repair. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 112,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640732February 4, 2025
ENGINE
I have a 2022 GMC Sierra 1500 AT4 with a 6.2 engine. The truck had roughly 50,000 miles on it when the engine completely stopped working while I was driving on a busy multi lane highway during rush hour. After almost getting hit by multiple vehicles while trying to glide my truck to the side of the highway. I waited 2 hours trying to get my truck towed to a local dealership and the next day was told that my engine completely seized up and my engine needed to be replaced. I waited two months without my truck while it was at the dealership waiting on an engine that was back ordered. They told me it was complete engine failure. They couldn’t figure out why, all fluids were good yet the engine failed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640735February 4, 2025
ENGINE
Wife and I bought a truck from Serra Chevrolet on May 28 2024. We drove 180 miles and the engine blew up. Had it towed to another dealership in Louisville Kentucky at that point they replaced the engine. When we picked up the truck we had to pay $16,275.08. We contacted Gm and was told that the selling dealership should have taken it off of being certified pre owned but they didn’t. Was told they know to do it to future vehicles and there is no reimbursement . Gm website still has it listed of have a warranty till December 2025. We had 3 weeks of a truck rental at roughly $1,200.00 per week. Had another rental for another. 3 weeks I have paper work from a local dealer stating it still has warranty which would have covered complete expense of engine work We live in Ohio and had to travel back and forth 6 times. Hope there is some help for us.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640339February 3, 2025
POWER TRAIN
Transmission went out as I was pulling into traffic, no warning lights on dash and no issues until this incident and had it towed to the dealership where I was told it would be $6600 to replace the transmission and that it was completely in operable. My truck is a 2017 with 53816 actual miles. Called gm company and they will not help with repairs at all.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640380February 3, 2025
ENGINE
I currently own a 2022 GMC Sierra with 75823 miles on the vehicle. I purchased the vehicle new from Bill Cramer GMC, and just learned today that the engine has to be rebuilt due to bad lifters, cam shaft damage, and excessive oil consumption. According to the dealership and further research, this is a common issue with the GM 5.3L engine that is currently in my truck. Because the truck is now out of warranty GM will not cover the costly repair. Something has to be done regarding these engines, due to the thousands of people this has affected. According to the sites, no recall has been issued for these engines and its very dangerous to operate because the engine can lock up while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640394February 3, 2025
ENGINE
The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving 80 MPH, the vehicle lost motive power and stalled. The vehicle regained power within seconds and the contact was able to continue driving. There were no warning lights illuminated. The contact stated that the failure reoccurred. The vehicle had not been taken to the dealer to be diagnosed or repaired. The manufacturer was made aware of the failure and confirmed that there was no recall on the VIN for the failure. The failure mileage was approximately 50,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640413February 3, 2025
ENGINE
L87 engine locked up while driving dwon the highway. I have been waiting 7 weeks for a replacement engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640437February 3, 2025
ENGINE, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING, LANE DEPARTURE: BLIND SPOT DETECTION
I have had no issues with my vehicle since I purchased it in July 2022 and keep up with the routine maintenance on it. About 2.5 weeks ago I was driving to work like I normally do and the truck started making a knocking noise and all these sensors lights came on the dash. The alerts were saying to service the parking brake, service ESC, and that steering assist is reduced and to drive with care. The vehicle also started shaking and would not accelerate properly or shift gears. We ended up taking it to the closest GMC dealership and they were in able to diagnose it just by simply hooking it up, they had to fully dismantle the engine in order to diagnose it. They came back and said cylinder number 4 is damaged as well as the lifters and cam shaft. I am no car expert but it is weird that a car that is relatively new and has the maintenance kept up on it should not experience a serious malfunction like this. What is even weirder is my sister in law has a 2020 Chevy Silverado where the almost identical thing just happened to theirs and it too is now in the show as well needing its engine and stuff repaired.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640443February 3, 2025
POWER TRAIN
The engine failed with 15,000 miles on it. No warning lights ever came on. Had the oil changed several days prior. Lost power, but was able to drive to the dealer, but making weird noises.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640536February 3, 2025
ENGINE
I was driving my vehicle when is started making a loud noise coming from the engine . My vehicle turned off in the middle of road and didn't start again. Putting the safety of the other drivers and my ownsafety at risk.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640172February 2, 2025
ENGINE, POWER TRAIN
On or around January 27 2025 my 2022 sierra loss power and shut down at night and dropped to 0 rpm. I was close to the house and got pulled home by relative. When I did get it cranked lifters were tapping which was common in the 6.2 but I drained my oil and filter and saw the glitter look. Truck was still tapping after warmed up. Last night I about got hit at an intersection when same thing happened. I felt a jar, and truck went to zero rpm and loss power. Truck said, put in neutral and try again. When I pushed starter had a click. Then I pushed start again and it started smoking. It burnt my starter up, because engine is seized. I saw where there is an investigation on this and I really hope it goes through because that was a scary moment and it is safety concern. Twice the same thing. But now can’t turn crankshaft, nothing to drive, making payments on a 80,000 truck that is my personal and work vehicle. 92000 miles on my truck and have my oil changed regularly. I’m stuck between rock and hard place, but will be getting it towed to a dealer somewhere. To here I need a 6.2l engine in my sierra slt. 2 year old truck it is stressful. I know im going to here 10,000 $$$ I don’t have.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640193February 2, 2025
ENGINE
6.2 ecotec GM engine failed, it is available for inspection at the dealership. The engine failed while driving with no shoulder to pull over. According to the dealership the main crankshaft bearings failed causing catastrophic failure. The dealership has confirmed and reported to GM on 1/24/25. There was no warning to the failure. I was driving approximately 40mph and lost complete power with no warning whatsoever.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640251February 2, 2025
POWER TRAIN, VEHICLE SPEED CONTROL, ENGINE
On the morning of 1/19/25, my 2021 GMC Sierra 6.2L AT4 went into limp mode heading south on HWY 207 in Leavenworth, WA at approximately 60 m.p.h. Fortunately, I was able to avoid a rear end collision. I quickly turned the truck off in the middle of the road and restarted it with a CEL. When I returned home almost 180 miles away, my local mechanic diagnosed a code P0303 and cleared it. Since, the truck has continued to shutter at various speeds without throwing a code. It is currently at Haselwood GMC in Bremerton, WA being scanned, recorded, and findings set to GM waiting for resolve. I have notes, exact dates, times, call records, return voice mail messages, and dealership personnel spoken to, etc. The dealer’s lead technician and I were able to replicate the shutter on a road test together on 1/27/25 at 3 p.m. after having driven just 10 miles. During my visit on the morning of 1/30/25, the lead technician stated he has since been able to replicate the shutter seemingly getting worse. I was strongly encouraged by the service manager, service writer, and lead technician their collective “personal recommendation” was to not take the truck back. Haselwood has had the truck since 1/27/25. Still awaiting a response and resolution.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640028February 1, 2025
UNKNOWN OR OTHER
Water entering from the rear window causing rear seats and roof hard cover to get wet and cause a wet odor (humid). 2020 GMC 1500 AT4
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640036February 1, 2025
ENGINE, POWER TRAIN
Unknown mostly. Water pump ended up cracking while running. Power failure notice had come up on dash and then vehicle shut off while running. Dealership made repairs but unable to identify root cause.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640125February 1, 2025
UNKNOWN OR OTHER
Only owned my 2024 gmc sierra 1500 for 5 months close to 10,000 miles on odometer. Transmission valvebody failure. Gm and dealership says no ETA for a replacement part. Im hearing from other customers with same issue part will take 5-6 months for dealership to receive part. I have a brand new truck that im making truck payments on just siting at the dealership waiting for a transmission valvebody. This is unacceptable! There are many many GM customers dealing with this same issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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