GMC Sierra Complaints

15,732 consumer complaints on file.

#11491956November 2, 2022
SERVICE BRAKES
The contact owns a 2021 GMC Sierra 2500. The contact stated while approaching a stop sign and depressing the brake pedal, the brakes were squeaking. The vehicle was taken to the dealer and the contact was informed that the brake pads needed to be replaced. The brakes on the vehicle were replaced but the failure reoccurred. The vehicle was taken to another dealer and the caliper on the front driver’s side was replaced and the failure reoccurred. The vehicle was taken to another dealer who was aware of the issue however, there was no recall for the failure. The manufacturer was not contacted. The failure mileage was 800.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491986November 2, 2022
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
Water leak, known in other years of the same model vehicle, caused the rear defrost to fail and smoke when in operation nearly causing a fire in the vehicle as it was being operated.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491775November 1, 2022
SERVICE BRAKES
The braking on this vehicle is dangerous! Very poor stopping power. I’m am frightened to tow a trailer behind the vehicle because of its extremely poor stopping distance. This is so bad that I think there must be some sort of design error or something. Someone needs to look into this.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491589October 31, 2022
SERVICE BRAKES
New vehicle purchase on 10/17/2022. Attempted to tow 7300 lb travel trailer on 10/21/2022. When tow began DIC warning message said “TRAILER BRAKE DISENGAGED. SERVICE REQUIRED” Trailer is 2023 Airstream with no brake failure. Disabled trailer brakes not safe to operate. GMC Dealer acknowledged the failure but unable to fix.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491481October 30, 2022
POWER TRAIN
Stopping at a light and transmission jerks forward, almost causing me to rear end and other vehicle. Transmission jerks and clunks forward.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491523October 30, 2022
SERVICE BRAKES
Breaks are not working
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491261October 28, 2022
SERVICE BRAKES
Service Brake assist is illuminated, Brake Failure has occured. Near miss on Busy street leaving parking lot.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491283October 28, 2022
EXTERIOR LIGHTING:HEADLIGHTS
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at an undetermined speed, the low-beam and high-beam head lights became inoperable. There were no warning lights illuminated. The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 50,000. The VIN was not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491315October 28, 2022
STEERING
The contact owns a 2018 GMC Sierra 1500. The contact stated that while pulling up to park the vehicle at approximately 2 MPH, the power steering failed causing the contact to use an excessive an extra amount of effort while maneuvering the steering wheel to park the vehicle. The power steering assist warning light was illuminated. The contact took the vehicle to the dealer to be diagnosed. The contact was informed that the steering assembly and steering gear needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure and filed a case. The approximate failure mileage was 39,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491138October 27, 2022
STEERING, SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
After leaving my truck parked for a couple of hours over dinner I returned to find error messages stating "Service Power Steering / Drive With Care" and "Service ESC". I also received a notification from OnStar stating "Diagnostic Alert: Service the Antilock Braking System in your 2022 Sierra within 1 day." My power steering was non-functional, nor were any cruise control functions. Repeated stop / start cycles did not clear the errors or regain functionality. After parking overnight everything was functional, and the errors on the DIC were gone. Using a code scanner there were historical codes of U0131 and U0422.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491179October 27, 2022
ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL, ENGINE, ELECTRICAL SYSTEM
The contact owns a 2021 GMC Sierra 1500. The contact stated that while operating the vehicle, the dashboard gauges, instrument cluster, and infotainment center malfunctioned and became inoperable. Additionally, while starting the vehicle, there was a loud cranking sound coming from the engine compartment and the vehicle would not immediately start. The vehicle was taken to the local dealer, but the cause of the failure was not yet determined. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 100.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11491029October 26, 2022
POWER TRAIN
Truck has 67,000 miles and has been in the dealer 3 times for transmission issues. First was the shutter. Then harsh jerking downshifts. They flushed transmission and filled with new fluid under warranty and after 1,000 miles light on again for transmission fluid temperature sensor. And now they want $800 to replace this issue. There was a recall on the 16 model for the same issue with the wiring. About to cut loss and file lemon law. Had the truck for less then 2 years and put 15,000 miles on it
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490822October 25, 2022
SERVICE BRAKES
I purchased a 2019 GMC Certified 2500 Diesel Truck with 48000 miles I started getting alerts on my dash stating TRAILER BRAKE SYSTEM over and over. I would press the dismiss button but it would not stop from appearing and dinging over and over. I took vehicle to dealer ship since I have remaining bumper to bumper and extended warranty coverage. To my dismay I find out the Dash Trailer Brake System switch is faulty. Good thing I had an extended warranty since the bumper to bumper does not cover electrical. While truck was still under warranty the same alert came on but the GMC dealership did not find and issues. I feel the trailer brake system was defective from the start. I am being force to pay over $300.00 out of my pocket since my extended warranty did not cover the entire cost. SHAME on you GM for putting cheap quality parts on expensive trucks...
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490866October 25, 2022
FUEL/PROPULSION SYSTEM
The def heater gm part#84162464 has broken on my truck. There are many owners with the same problem on their duramax diesels. This has been an issue since def tanks were mandated by the federal government. The replacement cost is estimated to be $2000. from my local dealership. The truck had 50,000 miles on it when the heater first started working intermittently. I'm reporting this so it can be logged in as another incident for failing, poorly engineered parts.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490566October 24, 2022
ENGINE
Improper cooling cycles causing coolant leaks on the radiator
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490463October 23, 2022
POWER TRAIN
My 2020 Sierra SLT always hesitates or stutters upon take off only on the very first start of the day every day. It appears to be a transmission gear issue or perhaps air/fuel issue. I also have had several different issues with my infotainment system. It screen changes from one screen to another on its own occasionally and it also has a very loud pop when I turn off my iphone Xr from the trucks sound system as if it will crack my speakers. I have taken it in to two separate Cavendar GMC dealerships in San Antonio on 3 different occasions and they claim it does not do either. This cannot be the case as it does it for me every single day since I bought it from the showroom floor. They have said they have updated or reprogrammed both systems but I still have both issues. I am about to lose warranty coverage and I am afraid this will never be addressed. I am taking it in 1 last time. I will never buy another GM product!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490387October 22, 2022
ELECTRICAL SYSTEM
Water intrusion from antenna ran down into my wires causing corrosion in my electrical harness. Truck will throw code p2138 and go into reduced power mode. Very dangerous when you are in traffic. Truck will not go over 15mph when this happens. This has been a problem intermittently since I have owned the truck at 119000 miles . Gotten progressively worse.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490253October 21, 2022
SERVICE BRAKES
Brakes give out in the parking lot or at low speeds out of no where. I was told there are recalls for this but I looked it up and it’s saying no? I don’t wanna have a brake failure and wreck. Looking for some help please
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490095October 20, 2022
SERVICE BRAKES
Reference GMC PIT5948A : Service Trailer Brake Message with DTC C159C - October 6, 2022. When I connect my trailer that has trailer brakes the system recognizes my trailer and the trailer brakes work until I try to drive. I get an error message "Trailer Brakes Disabled Service Trailer Brake System". This may happen within a few feet or the longest is about a mile. GMC has no fix and the dealer while cooperative didn't/couldn't trouble shoot the problem as the above PIT has no known corrective action. Now I own a truck that has the "Max Trailer Package" that is rated to pull 13000 lbs but has no trailer brakes. I have eliminated my new trailer as the source of the problem by making a Trailer Brake Emulator, see PIT #5509H Diagnostic Tip. The error continues to happen. This puts myself and the public at risk if the trailer is heavily loaded.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490135October 20, 2022
SUSPENSION
I was taking my truck to have an oil change and tire rotation at the dealership. I have just traveled approximately 15 miles on the freeway, exited, and entered the parking lot of the dealership. I went over a speed bump at about 5-7mph and felt a clunk, with a grinding sound and the car pulled to the right. I got out of the truck and found the front passenger wheel was hanging off with only the lower connections attaching it to the frame. (Control arm maybe?). The service department worker was right there when it happened. He told me they have been having issues with the leveling kits on 2020 GMC sierras causing this issue, especially on the right side. He said that this was not the first that he had seen. Two other people at the dealership mentioned the same thing. I was never notified of the potential failure and possible catastrophic consequences. I contacted GMC who's "Product Allegation" department told me they could not investigate because the truck was repaired at the dealership. They didn't even review the photos I had sent them.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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