GMC Sierra Complaints

15,732 consumer complaints on file.

#11555714November 17, 2023
STRUCTURE:FRAME AND MEMBERS
The contact owns a 2012 GMC Sierra 1500. The contact stated that during a vehicle inspection, the contact was informed that the sub frame was severely corroded with holes. The vehicle was taken to an independent mechanic, who determined that the sub frame needed 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
#11555389November 16, 2023
SERVICE BRAKES
It takes quite the amount of force to stop the vehicle brake pedal started feeling spongy and seems like it doesn’t have enough pressure constantly I have no brake fluid leaks or air in my lines it all comes down to the brake booster it seems like and I know a few vehicles had this problem but mine says it wasn’t but I believe it has been affected.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11555471November 16, 2023
ELECTRICAL SYSTEM
While driving the vehicle, the volume on the audio panel shot up to 100%. It caught me off guard and nearly caused me to steer into oncoming traffic. All volume knobs and switches were unresponsive including the power button to the whole unit. I had to pull over and shut off the truck and let it sit for over 10 minutes in order to get it to stop. There are now numerous audio issues, including but not limited to the audio speakers making a crackling noise so bad it renders the use of any audio completely, also periodically the audio loses all volume and will remain completely silent regardless in AM/FM, Satellite Radio, bluetooth or phone call. All these seem to happen anytime the truck gets wet from either car wash or the weather.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11555164November 14, 2023
SERVICE BRAKES
Brakes go out at low speeds, especially in reverse. Makes it really hard to stop vehicle. It happens at least once every couple days and seems to be getting progressively worse.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554974November 13, 2023
UNKNOWN OR OTHER
The frame of the rear window cracked which allowed water to enter the cab. Water made its way onto the rear anchor strap of a car seat and saturated it which could have caused it to possibly not perform properly, which could have injured a child. Since the rear window can be opened electrically it is possible that a short could occur due to the water intrusion. GM has a service bulletin out about resealing the window but will not cover the repair or replacement of the window if it is outside the 36,000 mile warranty period. Obviously this is a manufacturer defect that has numerous occurrences or there would not be a bulletin created for it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554712November 12, 2023
SERVICE BRAKES
Break get rock hard at times and makes it almost impossible to stop at a safe distance
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554740November 12, 2023
STEERING
At low speeds, while turning rapidly steering would get stiff and then come back on.On two occasions, lights would flicker and a steering power loss warning would briefly appear, and then disappear
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554625November 11, 2023
ENGINE
I took my 2017 GMC Sierra 1500 SLE in to my local dealer because the engine was misfiring and there was a loud ticking noise coming from the engine. There was a sudden onset of loss of power, sluggish acceleration and shuttering. The dealership technicians did their diagnostics and found "cyl 1 miss fire removed valve cover and rocker arm found cyl 1 intake push rod bent replaced cyl 1 rocker arm push rods and all driver side lifters re[placed v loam resealed all 8 injectors cleared code miss fire is cured." This is a known GM issue as pursuant to service bulletin 15-06-01-002L. Upon further research from other complaints it was reveled to be caused by KNOWN defective or sub-par components being continually installed in GM vehicles. GM has knowledge of this issue and should take ownership of their shawty and deceptive work practices.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554641November 11, 2023
SUSPENSION, POWER TRAIN, STEERING
The vehicle steering wheel shudders at speeds from 40-55mph. The steering wheel shudders at 2-second intervals and is constant between those speeds. At first, I thought it might be one of the safety systems. It is not. This is unsafe and GM should be held responsible.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554530November 10, 2023
POWER TRAIN
Vehicle has jerking and feels like you are being hit. scared for my safety. Have taken my my Vehicle to a transmission shop for investigation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554317November 9, 2023
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL:SOFTWARE
The contact owns a 2020 GMC Sierra Denali. The contact stated while driving 75 MPH, the Adaptive Cruise Control feature became inoperable. The contact stated that when the vehicle got too close to another vehicle, the Adaptive Cruise Control feature failed to activate as designed. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 6,700. The VIN was unavailable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554368November 9, 2023
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
There is a water leak coming into the back cab of my 2019 GMC Sierra. My truck smells horrible the dealership can't find the leak. It smells very moldy and very concern for my children riding in the back breathing the unsafe air.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11553906November 7, 2023
FUEL/PROPULSION SYSTEM, ENGINE
Metal in the fuel filter and throughout the fuel system, 38 codes on the computer just in 2 weeks after a full service again at the dealer. All service has been preformed at A GMC Dealer since truck was serviced. 1. P026D - Fuel injection Quantity “A” Higher then expected 2. P06CC - cylinder 8 incorrect 3. P133F - cylinder 8 glow plug offset exceeding learning limits None stop this is happening since [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
#11553907November 7, 2023
SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
ABS LIGHT LIMITED TO 43 MPH ESC system Steering assist reduced Service Trailer Brake System Engine light on
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11553927November 7, 2023
ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
The contact owns a 2017 GMC Sierra 2500. The contact stated that while his wife was driving at an undisclosed speed, the vehicle experienced a loss of power steering assist, and the brakes failed to stop the vehicle immediately. No warning light was illuminated. The vehicle coasted to the side of the road. When the contact arrived on the scene, he noticed that the generator pulley had detached. The contact then purchased a new generator, which he replaced himself. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was 55,756.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11553703November 6, 2023
FUEL/PROPULSION SYSTEM
Vehicle has a hard shift in the lower gears. I have been told by GM authorized dealers and garages that the official suggestion from GM is a transmission flush, and that this may not resolve the issue. This service usually runs around $350+, and is not reimbursed at all or in part by the manufacturer. This has caused tire spin in parking lots and low speed situations (like crosswalks), and only seems to be getting worse as time goes on. This seems to be a widespread issue, with a large number of consumers reporting the same issue, and really seems to be a manufacturer defect
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11553384November 3, 2023
SERVICE BRAKES
Master break cylinder went bad and leaked fluid in side cab on driver floor board. Dealer identified that master break cylinder needed to be replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11553304November 2, 2023
FUEL/PROPULSION SYSTEM, ENGINE
Constant issues with glow plug failures, fuel rail failure, fuel pressure failure. Truck has been in the Gmc service regarding these issues constantly for the last year with a total of five repairs and replacement of glow plugs with releaning learning new plugs and now the 6th return to the shop they’re tearing down the fuel system. Malfunction and engine light consistently come on with the same occurring problems generating from the fuel system and glow plugs. Fuel mileage is absolutely terrible and lose of power hazardous to safety!!! Gmc has issued an extended warranty for 15 years and 150,000 miles, but cant and hasn’t found a repair for vehicle and just replaces the glow plugs just so they can fail again and again!!! They need to replace everything that needs to be done and if no fix they need LEMON Law The vehicle. This is ridiculous going back to the shop every two weeks I have my truck in the shop for a month to get it back, to put it back in the shop two weeks later, to have it back in the shop for a month. Since this start 17months ago I’ve only been able to put less then 7000 miles on the vehicle because GMC constantly has the truck! The is ridiculous when you’re paying $800 a month for your payment and insurance on your vehicle that you can’t drive because the manufacturer is constantly having to repair and replace the same thing over and over again
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11553064November 1, 2023
ELECTRICAL SYSTEM, STEERING
Steering will drop out / skip. Electical items have been an issue since I purcased this truck new. Dealer could never find why the wipers trigger randomly when truck is turned on. Truck randomy dies overnight.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11553081November 1, 2023
STRUCTURE:BODY
Chasis is very rotten
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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