GMC Sierra Complaints

15,732 consumer complaints on file.

#11662568May 22, 2025
ENGINE AND ENGINE COOLING
See attached document for complaint.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662578May 22, 2025
FUEL SYSTEM, GASOLINE
The contact owns a 2024 GMC Sierra 2500. The contact stated that after parking and turning off the vehicle, the vehicle failed to restart. No warning light was illuminated. The vehicle was towed to the dealer for diagnostic testing, but no diagnostic trouble codes were retrieved. The dealer replaced the fuel pump module. No further information was available. The manufacturer was made aware of the failure and advised the contact to file a vehicle safety complaint with the NHTSA Hotline. The failure mileage was approximately 11,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662251May 21, 2025
UNKNOWN OR OTHER
Rear window is leaking top coners from seal or plastic creating black mold inside of truck
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662257May 21, 2025
SERVICE BRAKES, ENGINE, UNKNOWN OR OTHER
Engine started skipping, then service parking brake light came on, then service engine light came on and speed dropped to 44 mph.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662292May 21, 2025
ENGINE
The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle jerked while accelerating and while coming to a stop. The check engine warning light was illuminated. The vehicle was taken to the dealer, but no cause of failure was found. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 65,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662326May 21, 2025
SERVICE BRAKES, HYDRAULIC
The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at various speeds, while depressing the brake pedal to slow down, the brake pedal lost pressure, and the vehicle experienced a reduction in braking power. The contact had to depress the brake pedal with additional force to properly slow the vehicle. There was no warning light illuminated; however, the message "Brake Assist" was displayed on the instrument panel. The local dealer was not contacted, and the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 135,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662387May 21, 2025
SERVICE BRAKES
Parking brake locking up. There is recall on the brake module for my year make and model but my vehicle isn't on the list and I feel it should be. I'm having the same issues as they are. I can't drive it until it is fixed. Very dangerous.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662398May 21, 2025
STEERING
The contact owns a 2014 GMC Sierra 1500. The contact stated while driving at an undisclosed speed and attempting to turn the steering wheel, the vehicle lost power steering functionality. The contact stated that the failure had recurred intermittently and had progressively worsened. A message advising of a power steering failure and to drive safely was displayed. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 150,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662443May 21, 2025
POWER TRAIN
Control Valve Engine Coolant which is a well known issue with back orders taking months for the part and GMC not acknowledging responsibility and having loyal customers pay out of pocket.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662030May 20, 2025
ENGINE
Truck has failed coolant control valve. Unable to get replacement part. Truck is still under factory 3 yr 36,000 mile warranty. Truck has been in the shop but was not advised not to drive vehicle. Have had multiple instances where cooling fan is stuck on nigh and get reduced engine power message limiting power while driving. Also took truck in for recall that is currently on it and dealership failed to address recall it was scheduled for.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662056May 20, 2025
ENGINE
Engine started rough idle, reduced power, poor acceleration, ticking and knocking noises, and a check engine light and a few other lights came on the dash. Safety was not a risk at time of incident. Problem has NOT been diagnosed yet BUT have done a ton of research and it’s all leading towards lifter failure/misfire issues. No warning lights or symptoms prior to sudden problems.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662079May 20, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2024 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 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
#11662109May 20, 2025
ENGINE
My GM 6.2L V8 engine has seized in less than 100K Miles. Thankfully not whilst driving and being potentially harmful to myself or others with the catastrophic failure. This problem is being widely report and continually occurring. GM is saying that I am not included in the massive recall for this, However NHTSA notes the vin range as NR and indicates incidents are still occurring. Seems to be a real lemon situation here and even bigger a letdown to uphold consumer safety.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662115May 20, 2025
POWER TRAIN
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving on several occasions at speeds of approximately 35 MPH, the transmission shifted abnormally, and the vehicle started vibrating. Additionally, the contact stated that while driving at speeds of 65 MPH and higher, the failure worsened. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 146,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662126May 20, 2025
ENGINE, POWER TRAIN
Engine has stopped a couple of times at low speeds, Was able to restart and continue. Engine will occasionally make a "straining / Dieseling sputtering sound" when execellerating from low speeds or Stop. Transmission will make strange and strained shifts from time to time. This is reaccruing problem that comes and goes over the last approximately 2 yrs since about 9000 miles to current approx 25000 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662133May 20, 2025
ENGINE
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the low oil warning light illuminated. The vehicle was taken to the dealer but was not diagnosed or repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 67,600.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662156May 20, 2025
ENGINE
The engine cooling control valve malfunctioned while driving and limited acceleration making it hard to move out of the way of driving traffic. The dealer has confirmed all is this and inspected and they are unable to get the part to replace it because of a national bank order. No warning lights until part failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662227May 20, 2025
ELECTRICAL SYSTEM:CYBERSECURITY
Vehicle is remotely being hacked into by [XXX] and buddy's, there are many people connected just do your job and ypu find all the evidence for which you need 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
#11662015May 20, 2025
ELECTRICAL SYSTEM, POWER TRAIN, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
Battery would not hold charge and would need jump start. Transmission would not stay in gear while towing trailer and would only go to 5th or 6th gear and would jerk out of gear and oil temperatures would go to 225 degrees. Erratically shifting and while driving with cruise control stop with out warning
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662017May 20, 2025
POWER TRAIN
Transmission valve body failure 10,672 miles ..
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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