GMC Sierra Complaints

15,732 consumer complaints on file.

#11658709May 3, 2025
AIR BAGS, POWER TRAIN, UNKNOWN OR OTHER
The transmission would purge forward when shifting gears. The shifting was very rough. This vehicle had recently been in accident.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11658354May 2, 2025
STRUCTURE:BODY
Tail gate has opened twice while driving down the road.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658383May 2, 2025
FUEL/PROPULSION SYSTEM, ENGINE, ELECTRICAL SYSTEM
Driving 70 mph on highway and the engine shut off. Dash says shift to park to restart. Pulled over and put the vehicle in park and pressed engine start. Vehicle did not start back up. (No crank no start) Vehicle locked in park and wont shift. Vehicle was towed to my house. Replaced battery bus bar and vehicle started back up. Test drove and shut off again in my driveway. Will not restart. No engine light on. 124k miles on it. No warning of this happening. Vehicle randomly will shut off. Sometimes it turns on. Been parked since January in my garage for safety concerns until I learn of a repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658392May 2, 2025
UNKNOWN OR OTHER
Gm has acknowledged there is a safety risk to continue driving my truck due to potential engine failure. I was prompted to take it to service to have the issue assesed which I did. The dealer said they would not inspect it because there is no resolution approved. I offered on 45/1/25 to pay them to check it out but they refused. This is dangerous and unacceptable, I hope you can help.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658438May 2, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2020 GMC Sierra 1500. The contact stated that occasionally while driving at various speeds, several unknown warning lights remained illuminated, and the vehicle lost motive power. The vehicle was taken to a local dealer to be diagnosed, and the contact was informed that DTC: P0016 was retrieved, and it was confirmed that the engine had failed and needed to be replaced. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING). The contact expressed a concern that the remedy was the same engine that was prone to failure. The manufacturer was notified of the failure. The approximate failure mileage was 150,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658445May 2, 2025
SERVICE BRAKES
Ebcm software update errors
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658495May 2, 2025
ELECTRICAL SYSTEM, POWER TRAIN, UNKNOWN OR OTHER
I have taken my vehicle to 3 seperate mechanics (GMC, AAMCO and Independent). They all agree that my valve body inside the transmission must be replaced. The problem is that valve bodies are on a national back order and cannot be fullfilled for months, putting my transmission at risk for further failure. Reading online forums, there are many GMC owners facing this same issue. The mechanics at GMC are requesting that I change out my entire transmission, since that will be a quicker solution than waiting months for that valve body. Now, I am being told that they are having difficulty locating an original manufactured transmission. This puts me in a serious bind because my truck is my only vehicle and there are no valve bodies or transmissions to fix this issue. My truck is only a 2020 and I just surpassed 100k miles. There were no dashboard warning lights that indicated my trucks problem. Only the fact that my truck is shuddering when shifting gears and that a diagnostic tool had to find the source of the problem. This problem started about 5 months ago and has progressivly gotten worse.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658498May 2, 2025
POWER TRAIN, ELECTRICAL SYSTEM, ENGINE
The contact owns a 2024 GMC Sierra 3500. The contact stated that the exterior lights of the vehicle were flashing erratically, and the tailgate was opening unintendedly. The contact stated that while driving at various speeds, the vehicle experienced erratic transmission shifts, and the vehicle was jerking and made an abnormal clunking sound. The check engine warning light was illuminated. The contact pulled over to a truck stop and parked the vehicle. The contact stated that the battery became fully drained while parked with the windows rolled down in snowy weather. The contact stated that after waiting 6 hours for AAA to arrive, the vehicle jump-started. The contact stated that the battery had drained on several occasions. The vehicle was taken to the dealer, where it was diagnosed that the two batteries needed to be replaced. The vehicle was repaired; however, the failure persisted, and the vehicle overheated while driving. The contact stated that GMC OnStar was contacted and informed the contact that diagnostic trouble codes related to the transmissions were retrieved. The vehicle was taken to another dealer Weston Buick GMC (22555 SE Stark St, Gresham, OR 97030) to be diagnosed. The vehicle was being diagnosed. The vehicle was not repaired and remained out of the contact's State of residence. The contact related the failure to an unknown recall; however, the VIN was not included. The manufacturer was notified of the failure and covered vehicle rental expenses that allowed the contact to return to their residence. The contact stated that the vehicle was used for load transportation, and the failure had caused both the contact and her husband to be stranded while delivering loads, which caused lodging expenses and loss of wages. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658582May 2, 2025
ENGINE
The vehicle will crank and not start. Dealership said they cannot replicate the fault. Same problem occurred after with dealership not helping. I am a US Soldier currently stationed in Germany and continue to have the same problem every 2months. It will crank and not start. The truck will start on the second attempt after cranking for about 20seconds. The continued issue can permanently damage expensive repair parts that I will not be able to afford. I know I am not the only one with the same issue as I have talked to others and have no solution for this.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658592May 2, 2025
POWER TRAIN
Was driving vehicle on freeway at normal speeds and the vehicle lost propulsion. Engine was off and vehicle said to shift to neutral and restart. I was able to exit the freeway safely (barely) to the median. Vehicle would not restart. It has the L87 engine which is under recall. Vehicle is at dealership submitted under the recall. I am being told there is "no remedy" and "no parts" and given no timeframe for any fix to be completed. I am still liable for the payments, insurance and this is our only vehicle in a single father of three family.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658605May 2, 2025
ENGINE
The check engine light came on and the fan ran at full speed. The engine light is for a faulty coolant control valve which I've been told is a known issue and is on national backorder.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658064May 1, 2025
ENGINE, UNKNOWN OR OTHER
The transmission is constantly whirring, rattling, and screeching.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658073May 1, 2025
ENGINE
I was driving my truck from lunch and out no where the truck stalled and did crank back had it towed to the dealership and said needed new engine because the timing had jump..
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658078May 1, 2025
SERVICE BRAKES
While driving on the highway warning lights for ABS, Check Engine, traction control and towing disabled came on. Also, the truck was limited to a speed of 62 mph. When attempting to apply the brakes the peddle went to the floor and the truck was extremely hard to stop. Power brakes were gone and manual braking was the only way to stop. After pulling over and restarting the truck the power brakes came back. The truck was taken to the dealer and they claimed the truck needed some updates and was fixed. About four months later this same problem occurred again while coming to a stop causing the truck to miss a stop sign and enter an intersection. The same lights came on and the trucks speed was reduced. After restarting the truck the power brakes started working again and the truck was dropped off to the dealership. The dealer looked into the problems and said the truck needed computer updates but found no other problems. Driving this truck has become nerve racking not knowing if the brakes will stop working again.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658080May 1, 2025
ENGINE, POWER TRAIN
My camshaft failed only 1.8 years into having my brand new truck. GMC dealership repaired it so not sure if they have the part. My truck wouldn’t drive right causing everyone to be at risk. No warnings at all! I take very good care of my truck and the moment a light comes on I get it investigated. This repair was over 15000$ out of my pocket and they had to replace the engine entirely.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658086May 1, 2025
ENGINE
Engine failed GM made me pay for a new one. Second engine failed due to mechanics did not change out radiator. I now have a third motor with a recall. This vehicle has cost me a lot of out of pocket expenses, I believe GM owes me for the depreciated value plus lost wages. Maybe a buy back I'm not sure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658087May 1, 2025
ENGINE
The contact owns a 2024 GMC Sierra 3500. The contact stated that while driving at various speeds, there was an abnormal knocking sound coming from the vehicle. There were no warning lights illuminated. The vehicle was taken to a local dealer where it was diagnosed; however, the cause of the failure was not yet determined. The contact was advised by the local dealer that the engine might need to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658101May 1, 2025
ENGINE, FUEL/PROPULSION SYSTEM
I have received the notice about the recall and now I am just worried because I have a wife and two-year-old child in my truck. I don't want the engine issue to happen while they are in the truck and increases the risk to get into an accident if the engine fails. I have tried to schedule an appointment with my dealership and from the date I received notice on 04/28/2025. They stated I have to call back in two weeks which should be unacceptable because how about if the engine fails within the two weeks and causes even more issues for me and my family. This should be approached much quicker and fix the matter asap.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658105May 1, 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 not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658107May 1, 2025
ENGINE
The 6.2 liter engine spun the #1 and #3 crankshaft bearings. This was confirmed by the selling dealership, Guess Motors, who performed the engine teardown. This complete engine failure was not foretold by any warnings whatsoever. I was able to drive vehicle to the dealership before it stopped running. The dealership has ordered a replacement entire engine from GM however no delivery date has been received and this occurred on 04-04-2025. On 04-24-2025 GM issued recall # N252494001 on this engine configuration.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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