GMC Sierra Complaints

15,732 consumer complaints on file.

#11613949September 11, 2024
POWER TRAIN
The contact owns a 2017 GMC Sierra 1500. The contact stated while driving at various speeds, the vehicle hesitated and shuddered upon depression of the accelerator pedal with the check engine warning light illuminated. The vehicle was initially taken to a dealer where the dealer found no defects with the vehicle. The contact was then informed that the shuddering was normal operation. The vehicle was then taken to an independent mechanic and the mechanic discovered a defect with the bell housing. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 29,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11614009September 11, 2024
ENGINE
The contact's husband owns a 2021 GMC Sierra 1500. The contact stated that while her husband was driving 80 MPH, the vehicle stalled. Additionally, the "Shift to Neutral and Restart" message blinked. The vehicle was steered to the side of the road where the vehicle failed to restart. The vehicle was towed to an independent mechanic where the failure was not able to be replicated. The vehicle was then towed to the dealer where it was suspected that the crankshaft bearing had seized, putting pressure on the starter, causing a short. The contact was informed that the engine needed to be taken apart for a proper diagnostic test. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 81,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11613464September 9, 2024
POWER TRAIN
2023 GMC Sierra Duramax Diesel with 10 speed Allison Transmission with 28,000 miles can't be driven. Currently at the dealership due to a transmission valve body problem, codes P0700 & P0747. While driving I felt a hard shift and the truck jerk. The engine light came on and my truck went into low power mode. Let it sit over night and truck would shift fine. This happened 3 times over a 1 month period. After getting to the Chevy dealer they told me the issue is with he valve body and said they have been having multiple trucks come in with the same problem. They have a truck in there since May (4 months!) They told me there is no ETA for the part. I've read this is a common issue happening on 2023 & 2024 trucks like mine. I've read that the problems have been going on for over 1 year. This is ridiculous for a $90,000.00 truck. GM should be putting new transmissions in them or buying the trucks back. I'm considering contacting an attorney to inquire about the lemon law or what other avenues I can take regarding getting the truck fixed, and fixed properly.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11613374September 9, 2024
POWER TRAIN
The vehicle has been in the dealership from where it was bought numerous of times for the same problem. Transmission shifts very hard from one to two and Has lots of slippage. Dealer recommended a transmission flush and it did not fix the problem. They would keep telling me that the transmission is normal for slipping and slamming hard while changing gears. I’ve been to multiple shops and nobody seems to know how to give me a correct answer or guide me on how to fix my problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11613411September 9, 2024
STEERING
Rack and pinion went out and installed a new oem remanufactured one from GM directly. The dealership programmed it but it is facing the same issues for the steering going out at low speeds. The recall was already performed but on the old part. GM Program # N172085440 In the parking lot it goes out and I was driving and slowing down for a turn when the steering went out for 3 seconds going 15 mph then returned.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11613418September 9, 2024
UNKNOWN OR OTHER
I found out that the frame was rusted through beside the gas tank and was told there was a memo put out to the dealers that there was a problem with the frames not being coated properly and if the customer notice it they were to repair it. My truck was service regularly and undercoated regularly by the dealer the body is rust free but I am being told the frame is on safe and can't be repaired and GM will not make it right even though they knew there was a problem. I pull a travel trailer and if the frame was to break in half I am sure someone would be seriously hurt or killed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11613141September 6, 2024
SERVICE BRAKES
Stopping at a stop sign with several cars in front of me my vehicle wouldn’t stop, luckily the car in front of me moved. I immediately called the dealership to have my vehicle repaired. They confirmed my brakes had a problem including the vacuum pump having an internal failure. They replaced vacuum pump and required belts then charged me $800.00 for this service.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11612819September 5, 2024
SUSPENSION
See attached document for complaint.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11612567September 4, 2024
SERVICE BRAKES, UNKNOWN OR OTHER
When towing our 5th wheel RV we started getting messages on the computer that the trailer brakes were not working due to an issue with the brake controller. Trailer brakes would come and go. The only time we got notification was when towing. Only 20 minutes after getting the first notification we were involved in an accident due to the trailer brakes not working. We thoroughly had the trailer brakes and plugs checked and they are not the problem .
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11612620September 4, 2024
POWER TRAIN
The contact owns a 2021 GMC Sierra 1500. The contact stated while driving at various speeds, there was a whining sound coming from the transmission. The vehicle was taken to the local dealer who diagnosed and determined that the transmission was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure and informed the contact that the vehicle was not covered under the Extended Warranty for the failure. The failure mileage was 86,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11612681September 4, 2024
ELECTRICAL SYSTEM
This is the second time after already bringing in for service, while driving turning on the radio the volume goes to full volume with a Bose system it is ear piercing, none of the radio controls worked, I could not shut off the radio or turn the volume down it was locked at full volume. I had to stop in the middle of the road in Cambridge MA, Place in park, shut the engine off and open the drivers side door to shut the radio off, it took four attempts of restarting and stopping vehicle before the volume would return to normal. This is a severe SAFETY HAZARD THAT WILL EFFECT HEARING AND CAUSE AN ACCIDENT, I AM SO FED UP WITH THIS VEHICLE. I need to schedule another appointment for GMC to do nothing.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11612258September 3, 2024
POWER TRAIN
The contact owns a 2018 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the vehicle was violently shaking. While at a stop, the vehicle slammed the brake pedal, and the steering wheel was shaking. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the failure was due to the transmission. The mechanic test drove the vehicle, and the vehicle was shuddering and violently shaking, and the transmission was hard shifting. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 42,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11612319September 3, 2024
POWER TRAIN
The contact owns a 2015 GMC Sierra 1500. The contact stated that the vehicle shuddered upon depression of the accelerator pedal, there was no warning light illuminated. Upon investigation, the contact determined that the failure was likely caused by the torque converter. The dealer was contacted about the failure and informed the contact to take the vehicle for an inspection. The contact took the vehicle to an independent mechanic where the torque converter was flushed, and the transmission filter was replaced. Despite the repair, the contact stated that the failure worsened soon after the repair. The vehicle was taken back to the independent mechanic where the vehicle remained. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to file a complaint. The vehicle was not repaired. The failure mileage was approximately 140,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11612355September 3, 2024
TIRES, ENGINE AND ENGINE COOLING
The contact owns a 2017 GMC 1500 Denali equipped with Land Spider Tires, Tire Line: Wild Traxx, Tire Size: 35x121/2/R22, DOT: (N/A). The contact stated that while diving at various speeds and turning, the tires were rubbing against the sidewall. The coolant line blew out. The contact stated that the check engine warning light was illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the thermostat and Oxygen sensor needed to be placed. The manufacturer was not contacted. The failure mileage was approximately 130,000. The tire failure mileage was 130,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11612084September 2, 2024
ELECTRICAL SYSTEM, STEERING
On [XXX], on or about [XXX], while leaving out the garage the steering wheel locked-up and would not turn unless exceptional strength was used. We immediately notified Garlyn Shelton in Temple, TX dealer and had the 2017 GMC Denali towed with AAA. 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
#11611944August 31, 2024
SERVICE BRAKES, ELECTRICAL SYSTEM
The DIC randomly displays “check trailer wiring” then says “brakes connected” over and over. When this happens the brakes on the trailer quit working, all lights continue to work all the time. It hasn’t been back to the dealer yet but I will take it when I can. Other vehicles have no issues with this trailers brakes when towing. I have replaced the trailer pig tail 7 pin plug, cleaned all connections etc. The only thing that works so far is to disconnect one of 4 electric brakes then the DIC is silent and 3 brakes function. I even replaced some magnets in the trailer brakes but they were working prior to the DIC message that began on my second towing trip. There is a technical bulletin for some GMC trucks but my model isn’t listed as one. I believe it to be the controller or software since nothing seems to work as far as the trailer is concerned. It isn’t my trailers issue…I know they are going to say it is.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11611963August 31, 2024
STRUCTURE:BODY
I was driving on the highway around 70-75 mph and the upper moulding on the grille flew off and hit the windshield
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11611971August 31, 2024
STEERING
While driving on the freeway the power steering lost it's power. There was so much resistance from the steering wheel it became almost impossible to control the vehicle. There was a notice on the info screen " power steering needs service. I was able to get the truck to a GMC dealer where a certified mechanic had to replace the steering gear motor. The truck has been lightly used and only has 35,070 miles on the odometer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11611763August 30, 2024
UNKNOWN OR OTHER
Tailgate open/clise module continues to open without me hitting the auto release device in the truck OR fob. NOTE: GMC built in Quebec! It resulted in a call to the dealership this spring, an inspection and they indicated it was fine. The tailgate opened while I was parking my new Airstream and it caused damage to the propane tanks and tanks cover AND $1700 damage to my tailgate.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11611799August 30, 2024
ELECTRICAL SYSTEM, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
There are 2 issues with this vehicle: #1) The rear window defrost causes an electrical issue that melted the plastic on our rear sliding window. Dealer claims we put something hot against the window but we did not. This appeared after we used the rear defrost. Several other owners have complained about this as well. #2) The vehicle is advertised as having adaptive cruise but it does not have this feature.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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