GMC Sierra Complaints

15,732 consumer complaints on file.

#11677626July 31, 2025
ENGINE
GMC has been aware of this problem since May 2025. They still do not have a remedy. This vehicle has not been operated for 41 days, since the recall states "The connecting rod and/or crankshaft engine components in these vehicles may have manufacturing defects that can lead to engine damage and engine failure. If the engine fails during vehicle operation, the vehicle will lose propulsion, increasing the risk of a crash." Letter sent to GMC, but this site is not allowing me to download it. Safety recall N252494000
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11677146July 30, 2025
ELECTRICAL SYSTEM, STEERING
Loose steering and sometimes steering wheel wants to return to center When this happens I loose all electrical - dash goes blank engine dies etc. the hot battery cable is very hot to the touch. I disconnected the ground cable and wait a few minutes and power returns This is going to cause a wreck if it is not corrected Local dealer says could be bad battery I had already changed it there is a place to say when this occurred it has happened several times over the last year the last 2 times were within a week
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11677149July 30, 2025
STEERING, STEERING:RACK AND PINION
The contact owns a 2024 GMC Sierra 1500. The contact stated that while idling in the driveway, the steering wheel became inoperable. Additionally, the contact stated that after parking the vehicle, the vehicle failed to start. There was no warning light illuminated. The vehicle was towed to the local dealer, where it was diagnosed that the power steering control module(PSCM) needed to be replaced and reprogrammed. The vehicle was repaired, but the failure recurred while driving away from the dealer. The contact stated that the steering assist warning light was illuminated, and the message "Stop Driving" was displayed. The vehicle was taken back to the same dealer, where it was determined that the steering rack and pinion needed to be replaced; however, the parts were on backorder. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 5,754.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11677217July 30, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2021 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V274000(Engine and Engine Cooling); 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. VIN tool confirms parts not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11677274July 30, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2021 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V274000(Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The contact stated that while driving 30 MPH, there was an abnormal knocking sound coming from the engine compartment, and the vehicle lost motive power. The contact was able to pull over to the side of the roadway. No warning light was illuminated. The vehicle was towed to a dealer, where it was determined that the engine needed to be replaced. The vehicle was repaired. The contact stated that prior to the engine failure, the transmission was replaced. The dealer was contacted regarding the recall remedy, but the dealer was unable to provide an estimated time of availability. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The failure mileage was approximately 20,000. VIN tool confirms parts not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11677376July 30, 2025
ENGINE, FUEL/PROPULSION SYSTEM, SUSPENSION
Gear slipping since I’ve had the truck. Replaced parts of motor, new transmission installed and still gear slipping entering the second gear. A big jolt happens every time I accelerate and when I slow down about the 10 mph mark it jolts again. Spent well over $10,000 on major truck repairs. I just don’t understand how this truck has 0 recalls. My truck is similar to all of the v8 Sierras of that year and I strongly feel it should have been recalled due to the gears slipping and not enough power.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11677390July 30, 2025
FUEL/PROPULSION SYSTEM
Fuel tank leaking.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11677397July 30, 2025
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
My 2022 GMC Sierra 1500 shows message "Shift To Park" when turning off, even though it has been shifted to park. Have to play with shifter to get it to stop, sometimes turning it back on and off will do trick. Locking it with remote works most of the time but this last time it took over 10 minutes .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11676884July 29, 2025
ENGINE
Coolant Control Valve is faulty. Part number 24001355 for my GMC Diesel Sierra 1500. The check engine light goes on and sometimes the engine power will be cut in half to protect the engine. It can be inspected when needed. My truck cannot go as fast and the Engine fans sound very loud to cool down the engine. I was 3 hours away from my house when this happened the first time and I wasn’t sure I would make it home. I had to let the engine cool down for about 6 hours after I pulled off of the highway. This has happened two times so far and happens when the AC is on and sometimes when you use the remote start it won’t start the truck remotely and the check engine light goes on. The problem started in July 2025 with 51,000 miles. The engine control module code is P1098. I have asked my GMC dealership to look at the issue and they have told me that the part is backlogged for at least 2 months and they will not look at my truck until the part is available. I haven’t had any other issues with the engine so far and this was the first time a check engine light has gone on.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11676939July 29, 2025
SERVICE BRAKES, HYDRAULIC
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed; however, the vehicle failed to stop as intended. No warning lights were illuminated. The contact stated that the brake pedal was depressed to the floorboard. The failure also persisted while driving downhill. The vehicle was taken to an independent mechanic. The contact was provided information for NHTSA Campaign Number: 19V645000 (SERVICE BRAKES, HYDRAULIC). The vehicle was taken to the dealer; however, the vehicle was not diagnosed or repaired. The contact was informed that the manufacturer had closed the warranty, because the vehicle exceeded 100,000 miles. The manufacturer was not made aware of the failure. The failure mileage was approximately 156,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11677006July 29, 2025
ENGINE AND ENGINE COOLING, POWER TRAIN
The contact owns a 2022 GMC Sierra 1500. The contact stated while driving 60 MPH, the vehicle stalled. The message "hot oil" was displayed on the screen. The contact was able to coast to the side of the road where the vehicle failed to restart. The vehicle was towed to the dealer where it was diagnosed that the engine had failed and needed to be replaced. The vehicle was repaired. The contact later received notification of NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING). The contact stated that on a separate occasion, while the vehicle was idling, the vehicle vibrate abnormally. In addition, the transmission unexpectedly downshifted. The message to be careful when passing, and the message to use both hands while driving were displayed. The contact stated that most recently an alarm was coming from the vehicle. The vehicle was taken to the dealer where it was diagnosed that a fan had failed and needed to be replaced. The contact was unsure if the vehicle was repaired. The failure was a recurring failure. The contact was concerned about the safety of the vehicle while driving. The manufacturer was not informed of the failure. The failure mileage was approximately 37,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11677108July 29, 2025
POWER TRAIN
The valve body in the transmission failed at 28,000 miles. My name is attached to an additional same exact vehicle where transmission failed. These transmissions should be recalled due to loss of propulsion. The dealership service lots are full of vehicles with the same failed transmission
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11676748July 28, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2023 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the contact believed that an inspection and adding thicker viscosity oil was not a remedy but instead a temporary fix. 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 and was unable to explain the engine inspection criteria to the contact. The contact had not experienced a failure. Parts distribution disconnect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11676578July 28, 2025
VISIBILITY/WIPER
My rear electric window is leaking into my back seat area and the ceiling of the truck has water stains. It is coming from the roof and is leaking in 3 different areas. I am afraid I will now have mold in my car and I can’t have my grandchildren in the car to be safe for them. I had it checked at a local GMC dealer and I had to pay for a leak speacialist to verify and they confirmed the window has a leak. The leak started in April 2025 and has slowly gotten worse. The dealership said I will need to replace my back window to fix the issue and gave me an estimate of $1,100 and said my extended warranty will not cover this issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11676630July 28, 2025
POWER TRAIN
Code P0777 – "Pressure Control Solenoid 'B' Stuck On" – Reduced Propulsion / Reduced Engine Power Initiated While merging onto the interstate, this code triggered a reduction in engine power, limiting my speed to 35 mph on a highway with a posted limit between 40-70 mph. Due to the limited power, I was forced to drive on the shoulder to reach the next exit and pull into a service station. I verified the code using an OBD-II reader at AutoZone. Subsequently, I had the truck towed approximately 1 hour and 30 minutes back home. The vehicle has been at a GM dealership since June 24th, where the faulty valve body has been confirmed. However, there is currently no estimated arrival date for the replacement part, which was ordered on the same date. To my knowledge, the part has only been diagnosed electronically and has not yet been visually inspected. The dealer plans to remove the valve body and transmission pan once the replacement part arrives. Notably, there were no prior warnings, messages, or symptoms before this issue occurred; this code and power reduction were the first indications of a problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11676650July 28, 2025
ENGINE
The contact owns a 2021 GMC Sierra 1500. The contact stated while driving approximately 40 MPH, the check engine warning light started flashing and the vehicle was shaking with a misfire coming from the engine. Additionally, there was black and greyish smoke coming from the tailpipe. The Roadside Assistance request message was displayed on the instrument cluster. The vehicle was taken to a dealer where it was diagnosed with a misfire. The vehicle was not repaired. The vehicle was taken to the residence, but the failure persisted. The vehicle was taken to an independent mechanic to be diagnosed, and it was determined that the lifter had dropped, and the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11676523July 27, 2025
POWER TRAIN, ENGINE, SUSPENSION
i have 2017 gmc sierra 1500 6.2l engine i have maintain my service on this vehicle and now facing a complete engine failure due to the poor design of the engine by gmc. i have spoken with alot people and dealer mechnics and they all agree gmc and chvrolet know that this is a bad design but refuse to acept responsiblity for it. there are tousands of people with this same issue we cant fight this on our own we need your help please.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11676391July 26, 2025
ENGINE
I purchased my GMC Sierra AT4 from your Oman GMC distributor called Moosa Abdulrehman Hassan. The vehicle suddenly stops and transmission automatically shift from 'D' driving mode to 'N' natural. First it happened when the vehicle driven 200km only when I took it to dealer Moosa Abdulrehman Hassan, they re-programmed the vehicle and doesn't know what the problem is. Second time happened when the vehicle was driven approx. 1,600 km and 3rd time again happened on [XXX], engine stopped and transmission shifted automatically from D to N, I have to start the engine and continue my journey. Again, I brought the vehicle to GMC dealer Moosa Abdulrehman Hassan. They kept the vehicle for almost one week and unable to demonstrate or diagnose the problem and asked me to collect the vehicle. Its high risk to drive the vehicle, when suddenly the engine stops and the gear shift from 'D' to 'N' while driving. I had option to choose, Ford 150 or Dodge Ram I bought GMC because it suppose to be reliable and have the best safety features. But I really regret now why I have purchased it, there are no technicians in Oman with GMC dealer to identify and fix the problem. I can't drive the vehicle in such condition, risking my life and life of other drivers on the road. The vehicle is parked in my Garage, it new vehicle just completed 1800 km. The the dealer the solution is very simple, either fix the issue, or replace the car or refund my money back, the dealer is not doing any of these. Before taking legal action and reporting it to the court, which will bring shame to GMC reputed brand. I though I'll give my final try to report it to you. You are the manufacturer may be have a solution. 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
#11676392July 26, 2025
BACK OVER PREVENTION: WARNINGS, UNKNOWN OR OTHER
On or around July 12th 2025 at low speed of 2-4 mph my rear end locked up sending everyone in the vehicle hard stop forward. The vehicle wouldn't disengage leaving me no choice but to have it towed for the second time 1st time happened exactly the same about month and a half prior. Gmc service department department claims they couldn't find anything wrong after it sat for two days in there lot after having it towed they were closed weekends and looked at it that Monday morning finding no signs of anything wrong. After picking up my vehicle I strongly feel like if at higher speeds or even environment this issue will endanger myself passengers and bystanders. I need help with resolving this safety issues asap please. Gmc hasn't been much help service department nor Gm support options.
Crash:
No
Fire:
No
Injuries:
2
Deaths:
0
#11676398July 26, 2025
POWER TRAIN
I have a 6.2 engine that had a number 4 cylinder failure due to a engine defect of the crankshaft. They have recalled the 6.2 motors on the 2021-2024 year models. The 2018 year models with the 6.2 engine should be recalled also bc they are having the same issue. Please help
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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