GMC Sierra Complaints

15,732 consumer complaints on file.

#11647686March 11, 2025
ENGINE
I was driving down [XXX] near Harrisburg PA in an active construction zone when the truck shut off, the dash blinked a few things very rapidly then went black. I was barely able to coast to an area large enough to get my truck out of the highway traffic. I was stranded on the side of the highway for 4 hrs and due to the construction hardly able to get out of the truck safely as it was around a bend. I’ve had to have the truck towed to a few mechanics to learn that it has suffered a catastrophic engine failure as all cylinders have lost compression. It made no noise at all. There was no signs this was going to happen, just driving normally then a complete engine failure resulting in no compression in all 8 cylinders with no noise. 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
#11647697March 11, 2025
POWER TRAIN
Allison transmission - random hard shifts, random multiple DTC's, random limp mode. Clear codes and works fine until it doesn't. Might have to clear codes 3-4 times a day or it might make it a week before it goes into limp mode again.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647725March 11, 2025
ENGINE
Engine locked up while driving. I was able to get off the highway. Truck would not crank back up. When trying to start it screens would light up then go black. I had truck towed to nearest GM dealership. The GM dealership informed me that the engine was locked up.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647739March 11, 2025
POWER TRAIN
When I first bought my 2018 GMC Sierra with the 8 speed transmission it would shift hard from first to second gear. Then at around 58,000 miles my truck also started to have a vibration coming through the steering wheel around 45-55 mph. I took it to the dealership and they changed the transmission fluid and did a software update. I am now at 80,000 miles and my truck still shifts hard from first to second gear and makes a grinding sound when accelerating sometimes. I am afraid to drive my any long distances for fear of the transmission malfunctioning. I have not been back to the dealership since my truck is no longer under warranty. So the problem has not been reconfirmed by a dealer or independent service center or inspected by the manufacturer. There have been no warning lamps or messages or other symptoms. I hope that GM is held accountable for putting a faulty 8 speed transmission in my truck.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647746March 11, 2025
ENGINE
Truck was going into the shop for general maintenance when the engine stopped working just as we pulled into the dealership. The dealership towed the vehicle in to diagnose the issue and we were told the engine has blown. No warning, nothing. The vehicle went into the shop in December and still GMC cannot offer any lead time on when they can repair the engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647757March 11, 2025
STRUCTURE:BODY
Driving at highway speed the upper part of the front grill assembly detached at the hood, hitting the windshield on the drivers side causing the windshield to shatter in front of the driver. The piece flew back and hit the car behind me. This would have been an accident with a less experienced driver
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647758March 11, 2025
ENGINE, ELECTRICAL SYSTEM, POWER TRAIN
Lifters in engine failed at beginning of March 2025 and destroyed inside of engine. Transmission failed in summer of 2024 and had to be replaced
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647759March 11, 2025
STEERING
My truck wonders down the highway. It has been to the dealership well over 4 times. They have aligned the truck multiple times, changed the steering gear box, changed the power steering pump, changed tires and nothing fixes it. It takes constant adjusting of the steering to stay in my lane on any road. Quite pitiful for a $90,000 truck. It is currently at the dealership for the THIRD time in the past 7 days because they can’t get the truck to stop leaking fluids since changing the power steering pump. Excessive play in the steering and has been like that since day one that I left the lot. My wife can’t even drive the truck because she feels unsafe with how much play is in the steering. The dealership won’t do anything about it and is offering $20,000 less than I gave for the truck now that I can’t tolerate it anymore. But I refuse to lose that much money with only 13,000 miles on it. I just want a safe and reliable truck for my business and my family. Unfortunately that is not what GM has provided me with.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647299March 10, 2025
VISIBILITY/WIPER
The component that failed is the rear glass. Yes, it is available for inspection. The rear glass defogger stopped working and melted the tabs off of the glass and burned the tabs cover. The problem has been confirmed by the dealership and i was advised there is already a recall for this but apparently my vin does not fall under the recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647333March 10, 2025
UNKNOWN OR OTHER, POWER TRAIN
The Transmission cooler lines broke and spilled out all the oil/fluid on my 2020 GMC Sierra Elevation pick-up truck. Once all the fluid was spilled out the Sierra truck would no longer move. The Sierra truck was towed to the dealership I originally purchased the vehicle. The dealership was Cranbury Buick GMC. The dealership mentioned that the hoses broke/leaked from the crimped housing at the ends of the hoses. The dealership stated that the original OEM transmission cooler line hoses were discontinued and new OEM replacement transmission cooler line hoses were created. Please see the attached dealership bill/invoice for the parts and labor to fix the cooler line issue. I feel this issue should be a recall on all 2020 GMC Sierra trucks, especially if GM replaced the original OEM hoses with newly created OEM hoses Thanks [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
#11647334March 10, 2025
POWER TRAIN, ELECTRICAL SYSTEM
The contact owns a 2022 GMC Sierra 1500. The contact stated that after shifting to park(P) and turning off the vehicle, the message "Shift to Park" remained displayed on the instrument panel, with an audible chime coming from the vehicle. The contact was forced to use the key fob to lock and unlock the doors several times to correct the failure. The dealer was notified of the failure and an appointment was scheduled to have the vehicle repaired. The manufacturer was notified of the failure and provided the contact with a case number. The contact was then referred to the NHTSA Hotline to report the failure. The vehicle was not repaired. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647346March 10, 2025
ENGINE
Collapsed lifter or camshaft failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647353March 10, 2025
ENGINE
It blew a hole through the engine block. The engine is a 6.2 L 87
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647354March 10, 2025
ENGINE
During travel of the highway, the motor suddenly lost power and shut down with no warning lights or symptoms prior. Although I was able to get to the side of the road, the electronic shifter does NOT allow the vehicle to be put into Neutral. This is a known GM issue. This morning the dealer confirmed the engine needs replacement.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647217March 9, 2025
ENGINE
I've now had 2 engines fail catastrophically, One at 19,191 miles and the second failure at 80,661. Both are the 6.2L engine. The first had crank bearings that were black. The second I was not informed of the cause but that it was seized leaving me stranded on the roadside.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647094March 8, 2025
ENGINE
I left my house & was driving my truck down the highway for about 2.5 miles. All of a sudden the engine locked up & the battery went dead. I barely coasted off the opposite side of the road where the closest side road is & a semi pasted shortly after. I felt very lucky my truck made it off on the side road instead being run over by the semi truck. I then had to call a weaker & have it towed to the local dealership that services GMC trucks. After 4 days I finally got the worst news, the truck needs a new 6.2 engine. My 2023 GMC Sierra AT4 with 38k miles had an engine that locked up & I was flabbergasted. I started searching this issue on the internet & couldn’t believe how common this is & nothing has been done about this. I would assume a recall from GM would be appropriate considering the sheer number of 6.2 liters engines having issues over & over. This is absolutely unacceptable. I could have been seriously injured or even worse killed by the negligence of GM on this issue. I get it, GM made a mistake with this 6.2 engine and it’s going to cost a lot of money but my research tells me this appears to have been happening for a few years. As I sit here today my truck is sitting in a dealer lot with a busted engine & a new one is on backorder. I am currently driving a dealer “loaner” Chevy trailerblazer. It could be weeks or months before I finally get word on another 6.2 engine replacement from GM. I own a small farm and do not have a truck to haul hay or feed for horses. Can the National highway administration please help me? I thought I was buying a dependable 2023 GMC sierra 1500 AT4 & instead bought a lemon. Apparently hundreds of thousands of other 6.2 liter engines like mine are a HUGE safety hazard & should be recalled. This seems like an open & shut case & after reading into the matter I can’t believe Gov. organizations like the National Highway safety administration has not did more and let GMs 6.2 liter engine contine on. What’s left to investigate?
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647111March 8, 2025
ELECTRICAL SYSTEM
When carrying the electronic key in my pocket the vehicle will lock/unlock presumably due to the remote contacting other items in the pocket. I have owned well over a dozen GM vehicles and never had this issue. I believe the remote design has the lock/unlock buttons too proud of the surrounding surface
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647125March 8, 2025
UNKNOWN OR OTHER
Vehicle is put into park after driving. Shift to Park warning comes on while vehicle is in park. Vehicle will not shut off due to this warning and must be left running unoccupied.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647175March 8, 2025
POWER TRAIN, SERVICE BRAKES
Vehicle shifting poorly, and I have had a bunch of brake and rotor issues.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11646916March 7, 2025
STRUCTURE
The contact owns a 2022 GMC Sierra 1500. The contact stated while driving approximately 75 MPH, the front chrome grille deflector erroneously detached from the vehicle and ejected over the hood of the vehicle striking the front windshield before nearly hitting another moving vehicle. The vehicle was taken to the local dealer who informed the contact of NHTSA Campaign Number: 25V060000 (STRUCTURE). The contact stated that the vehicle had experienced the failure listed in the recall. The manufacturer was not yet contacted. The failure mileage was 39,541.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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