GMC Sierra Complaints

15,732 consumer complaints on file.

#11641710February 10, 2025
ENGINE
cylinder #1 had misfire and this was because the liftt malfunctioned which inturn caused it to grind on camshaft
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641845February 10, 2025
ENGINE
At 28,000 miles and driving at highway speed, the 6.2L engine suddenly seized.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641569February 9, 2025
ENGINE
Driver side lifters collapsed and push rods failed on freeway without warning at 12900 miles on truck.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641397February 7, 2025
SERVICE BRAKES
The system that failed was the wire harness for the internal brake control. This is a well documented problem on YouTube and Reddit. I was driving home from the mountains, with my 7K lb camper, and I started receiving incessant messages alternating between "Trailer Brakes Disconnected" and "Trailer Brakes Connected". The messages made it impossible to see the speedometer and hear music or calls. Most importantly, I lost my trailer brakes in the mountains of North Carolina. Meaning the only way I could slow down was with my truck brakes, while a 7,000 lb camper was pushing me. I took my truck to the dealership today and paid $166 for a diagnostic. The stated the issue was with my camper. I tried to explain that many owners were having this problem and it is well documented. They stated there was no recall on my vehicle and gave me a print out of what to check on my camper. I checked my camper and there are no issues and no issues when i connect it to my other vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641401February 7, 2025
POWER TRAIN
The contact owns a 2020 GMC Sierra 2500. The contact received notification of NHTSA Campaign Number: 24V797000 (Power Train). After reading the context of the recall, the contact stated that the proposed remedy of a software update was not an adequate repair for the rear wheel lock-up failure. The contact stated that the safety of the vehicle could not be trusted and believed that the vehicle was unsafe to operate. The local dealer was made aware of the issue and confirmed the recall remedy. The contact was referred to the manufacturer for further assistance. The manufacturer was made aware of the issue and the contact proposed a buyback offer for the vehicle which the manufacturer denied. The contact was provided a case number. The contact had not experienced a failure. Parts distribution disconnect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641247February 7, 2025
SERVICE BRAKES
The vehicle has no power assist when at low RPMs and is a hazard that may cause an accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641273February 7, 2025
ENGINE
Lifters are failing which could cause motor shutdown during driving.11/26/2024
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641307February 7, 2025
ENGINE
Engine threw a rod and needed to be replaced out of pocket due to vehicle being out of warranty. Going down I35 so not safe at all. All dash light illuminated when it occurred.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641326February 7, 2025
ENGINE
The contact owns a 2022 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, there was a loud knocking sound coming from the engine compartment. The vehicle was driven to the residence. The vehicle was taken to the dealer and was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired; however, the contact was informed that parts for the engine replacement repair were on backorder. The manufacturer was made aware of the failure and a case was filed. The contact was informed that the repair was covered under warranty. The failure mileage was approximately 60,800.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641029February 6, 2025
ENGINE
#6 cylinder AFM lifter failure. Inspected by a technician.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641037February 6, 2025
ENGINE
I have a 2018 GMC Sierra 1500 with a 6.2 motor. Back in December of 2024, I had to replace a tie rod, cam shaft, and the lifters. $8400 to get everything replaced. Since my warranty had expired, I had to pay all of this out of pocket. I know there is currently an investigation going on in GMC's 6.2 motors. Almost 900,000 engine failures. This is unacceptable. GMC just needs to man up and send out the recall notice. Since I have already had to pay for my replacements, GMC should do the right thing and and cut me a check.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641087February 6, 2025
POWER TRAIN
The trucks engine completely shut down while going approximately 60 MPH while merging onto the highway. The trucks dash flashed multiple times, a ticking noise was heard, it put itself in neutral, and shut the engine off. All power was lost. I did still have brakes. Safety was a concern as there was a vehicle behind me entering the highway too. Cars to my left as well passing at highway speeds. Once I got the vehicle stopped on the shoulder of the highway it put itself in park. It would not restart. The vehicle was towed to a local GMC dealer. There were no warning lights of any kind that came on. No indication that there was a problem. A couple days later I was informed that the truck would need an entire new engine upon inspection. I was also told by the dealer that the truck had no oil at all in it. The engine consumed it internally by their evaluation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641198February 6, 2025
SERVICE BRAKES
I noticed there was an issue regarding the break assist system in my vehicle a few months ago when I went to go for a drive. It is available to be inspected. The issue regarding safety revolves around the difficulty to break. The low amount of brake availability is dangerous in the case of a situation that if I needed to break quickly it is extremely difficult to. I have not had a certified individual confirm the issue at this time. It has not been inspected. The warning message "Break Assist" comes up every time I try to utilize the brakes. I know there are previous recalls, although when I have tried to see if my truck falls under those recalls it does not.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641203February 6, 2025
ENGINE, VEHICLE SPEED CONTROL, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
While driving on the interstate, my vehicle started losing speed. I pulled over to the shoulder of the interstate and put in neutral so I could coast further to the exit ramp where I would be in a safer location. My vehicle has 14037 miles on the odometer and has now gone through 2 engines. It has always been serviced by GM.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641210February 6, 2025
SEAT BELTS
The contact owns a 1999 N/A GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 00V097000 (SEAT BELTS); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640869February 5, 2025
POWER TRAIN
Vehicle jumps when shifting gears. When coming to a stop it jumps Forward. Hard shifting.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640904February 5, 2025
ENGINE
Engine Mileage is 72,728, on my 2022 GMC Sierra 1500 AT4, L87 V8 Engine. While driving [XXX] to drop off a co-worker at a Toyota dealership, my engine started making a strange "clicking" sound. A Toyota tech came out to look at it quick and suggested I try to get to a GMC dealer about .5 miles down the road. I made it about 100 yards before the entire truck shut down. The dash went black and then engine stopped running. Had to get towed to the dealership. Engine is considered "dead" by Diamond Auto in Worcester, MA, and the cost to replace the L87 V8 Engine is quoted at roughly $11,717.89. There have been zero prior engine issues on this vehicle. The engine failure came out of no where. Thank you for your time- [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
#11640910February 5, 2025
POWER TRAIN
Knocking, stalling, shaking, lost of power and steering problems. Serviced transmission twice and I was advised to serve every 30000 miles!!! I owned several types of vehicles but I never heard such things before. Technician told me that apparently many GMC customers reported same problems.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640983February 5, 2025
ENGINE
While idling, I noticed a knocking sound. Dealership found that rockers on both banks not rotating from lifter failure. Dealership replaced both lifter banks. Luckily this was caught early and was corrected for engine failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640994February 5, 2025
ENGINE
Purchased this vehicle on 06/29/2023 from Robideaux Motors in Coeur d Alene ID. with 81,397 mile on the odometer. On 01/05/2024 the 6.2L engine with 84,109 miles, started having a ticking sound after starting it at my son's house two miles from home. I called the dealer and was told to bring it in for diagnosis by a tech. While driving the truck to the dealer the ticking got worse and motor started to shudder and the check engine light came on. Cause was a misfire on cylinder 4 due to bent push rod and failed lifter. Replaced lifter bank 2 with new push rod. Total cost was $2,852.74 (have invoice). After many calls and letters to my extended warranty company, they finally paid $1688.54 of the total cost. On 08/29/2024 the same ticking sound started again as well as the shudder and check engine light. I had it towed back to Robideaux Motors and was told it was a misfire on cylinder 6 due to lifter failure. Robideaux Motors did repair under their repair warranty. I know that this vehicle is not included in class action suit, due to the year. I feel this to be a continuing problem with the GM 6.2 and 5.3L motors encompassing many model years. Just wanted to document that the number of years covered in the law suit should be expanded.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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