GMC Sierra Complaints (2023)

567 consumer complaints on file.

#11707832December 30, 2025
POWER TRAIN, UNKNOWN OR OTHER
Tailgate can open by switch located at storage area in console. It can be easily bumped then tailgate will o pen without driver receiving a warning light or dashboard message. If this occurs, and it did with this vehicle, any cargo could potentially fall out causing accident to vehicles following. Additionally, the powertrain (transmission) is a known problem for failure. If such a failure occurs the rear wheels can lock up causing accidents/injury to driver and others. NOTE- this has not happened to this vehicle yet but does cause concern for it happening and GM not doing a recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11707922December 30, 2025
STRUCTURE:BODY
Upper grill trim panel broke off while on highway and went flying over the truck while at highway speeds. Same issue as existing recall for the 2022 model.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11707371December 28, 2025
ENGINE
Cylinder failed right after I had the 6.2 engine recalled. Failed on a 1200 mile daily trip through winter conditions in Utah.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11707207December 26, 2025
FUEL/PROPULSION SYSTEM
Vehicle stalled out, lost power, left me stranded on side of road. No warning, check engine lights or any other inclination prior. Turn out to be fuel pump control module.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11706811December 23, 2025
STRUCTURE:BODY, UNKNOWN OR OTHER
The grille deflector suddenly detached from the truck and flew off into traffic. It narrowly missed the vehicle behind me and could have caused a serious accident or injury. There was no prior warning or impact that would explain the failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11702395December 2, 2025
ELECTRICAL SYSTEM
The Telemetry/OnStar unit stopped working on my 2023 GMC Sierra 1500 Denali. This renders the OnStar unit unusable for both data and calling OnStar. In the event of an accident, the driver could not call OnStar for help and OnStar would not get an automatic notification that there had been a crash with the vehicle's location. The failure of the unit has also caused a code indicating Low Brake System Voltage. I know that is not the case in my vehicle at this time, but if the brake system does start to fail, there is no way to know if the code is real or just a result of the Telematics system failing. This failure occurred shortly after an Over-The-Air software update GMC sent out. I have seen numerous reports of people with the exact same year and model having the same issue. The unit worked fine for 2.5 years and after the software update, it was bricked. GM wants in the neighborhood of $1,000 to replace and install the unit but they are on backorder with ETA's 3 or 4 months out. They are also coded with the VIN so there is no other option than to go to the dealership for repair. The part cannot be ordered from an aftermarket manufacturer or from GM's official parts website, local dealership only. In order to get this important safety feature working again, the only option is to go have it fixed at the dealership, which charges $200/hr in labor on top of the $500 part needed. The 3-4 month backorder should be enough evidence that GMC has had a widespread failure of these units. GMC basically broke the Telemetry/Onstar units with a software update and wants it's customers to pay for their mistake. If this is not considered an important enough of a safety feature for NHTSA to do an investigation on, this matter should be investigated as an illegal business practice with the FTC or Department of Justice. GM has effectively created a problem (through the software update) that only they can fix and then charging customers whose warranty has expired.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701356November 24, 2025
VISIBILITY/WIPER, EXTERIOR LIGHTING
While driving in the rain, the windshield wipers were on the highest intermittent setting and the high beam headlights were also on, automatic highbeams were not. The high beam lights dimmed to low, and the windshield wipers stopped in the middle of the windshield in the middle of navigating a sharp right hand turn at 35mph. The wipers stopped for approximately 30 seconds and then resumed operation. When the wipers resumed operation, the headlights also turned back on high with no input from the driver.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698528November 10, 2025
ELECTRICAL SYSTEM
The brake controller on trucks error out while towing. Shuts brakes off. Not a good thing towing 16,000lbs down hill. Almost accident. Destroyed my truck brakes and warped rotors. The controller checks the house battery on trailer and if not in range shuts brakes off. The brake towing screen in truck states all is good but there is this tiny little light at gain adjust location that goes off and you do not have brakes but yet your screen states you do. Bad deal.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698367November 8, 2025
STRUCTURE:BODY
Upper grill molding trim/bezel flew off truck. Part was recovered and clips look to have broken off. Plastic clips look to be insufficient and will break over time. Active recall for 2022 model vehicles only , needs to be expanded to 2023 or possibly further out.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698319November 8, 2025
ENGINE
I own a 2023 GMC Sierra 1500 (Black Widow Edition). The Truck has only 23000 miles on it. I experienced an Idle engine warning mid driving, and oil hot warning. It did Shutdown the engine of the vehicle and as I was trying to merge safely to the right lane and right side of the way the steering became very hard which put me and 3 of my employees in danger. After parking safely, I did call onstar and they ended up towing the truck while we waited for hours in the dark and cold temperature to get a ride. State police and Mdot did not show up even though we called them multiple times. This was a nightmare.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698192November 7, 2025
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
ECM - Engine System code P0700 and TCM - Transmission System code U0073. The truck went in to first gear and wouldn't go over 5 MPH on the highway. The dealer is saying it can't be replicated but it's happened multiple times to the vehicle in the past week. The truck was taken to the dealership and inspected but they claim nothing is wrong. The check engine light came on as well as the aforementioned codes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697942November 6, 2025
ENGINE, FUEL/PROPULSION SYSTEM
While stopped at traffic signal, vehicle suddenly stops running. Restarted vehicle and had to feather the throttle to keep it running. Engine began to run normally so I continued driving. When I reached approximately 35 mph, a loud rattling noise started and experienced a severe loss of power. Fortunately I was able to safely get out of the traffic lanes to the side of the roadway. I inspected the vehicle, no oil leaks, no coolant or transmission leaks. No warning indicators on the dash. Oil pressure normal. Temperature normal. I limped the vehicle home to be towed to dealer. Approximately 2 months ago this vehicle passed the recall inspection and had the recommended oil change. There was a previous warranty repair performed on a stuck exhaust valve in the #8 cylinder. The vehicle was also brought in to the dealer for suddenly cutting off while driving approximately 50 mph. Again I was able to pull off safely. The vehicle then started normally and I proceeded to drive. The dealer inspected the vehicle and could not replicate the issue, and found no electrical or mechanical trouble codes. There were absolutely no warning indications prior to each of these events.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695756October 27, 2025
STRUCTURE:BODY
Molding between top of grill and hood came off while traveling on highway and struck windshield and broke it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693863October 16, 2025
ENGINE AND ENGINE COOLING
See attached document for complaint.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693020October 13, 2025
UNKNOWN OR OTHER
OnStar module in-operable, bought the vehicle expecting the system to work as it is another safety feature in case of an accident. Technical support will not continue to respond when contacted. Will not assist with any technical support to diagnose issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691970October 7, 2025
STRUCTURE:BODY
The top of front grille broke off at 70 mph, struck the windshield then the fixed antenna on top of the truck then into traffic behind me all doing 70+ MPH across a one mile long 2 lane bridge with no place to avoid the debris. The failed part endangered myself, my family and anyone traveling behind us. No one has seen the remnants of the event/ issue but The part was approximately 2ft long and 8 inches wide. The truck has a top piece that sits between the hood and the top of the grille. The part is gone but one can see the broken clips and flimsy plastic. The previous year model of the truck had a recall opened earlier this year for the same problem but not my truck. Multiple forums online report the same event as mine occurring on multiple model years.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11690855October 1, 2025
ELECTRICAL SYSTEM, EXTERIOR LIGHTING
OTA update GM N25-250380 caused significant problems. Blinker tone and other safety tones are erratic. Infotainment system is erratic. Constant reboots while driving causing distractions. Camera screens will freeze on screen while driving down interstate. It may be affecting other systems as well since everything is erratic and buggy now.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11690463September 30, 2025
ENGINE
The check engine light is illuminated. Diagnostic information from the OnStar system indicates a fault within the engine cooling system. The engine cooling fan remains engaged continuously, suggesting a possible malfunction with the cooling system components or related sensors.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11690271September 29, 2025
POWER TRAIN
On 9/27 the engine light went on and message transmission May not shift
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11690457September 29, 2025
POWER TRAIN, WHEELS
At 12,018 miles on my 2024 gmc sierra 1500 I experienced a rear wheel lock up. I have 4wheel drive capability but I had the truck in rear wheel drive only. Thankfully I was not going fast at the time. I was going between 35-45 mph when experiencing the lock up. As I was going down a straight away, I experienced a rear wheel lock up of my 10L80 transmission. My tires were squealing like crazy. I pulled off onto the side of the road. After shifting to reverse and then park and then drive the problem corrected itself. When I brought it into the dealership, they could not find anything wrong with it. Additionally my trucks software was up to date and not lacking any updates. I don’t drive this truck very far and only drive about 150 miles a week. A rear wheel lock up of this magnitude at this low of miles is concerning. I’m not rough on the truck by any means. It’s more so a family vehicle than a hauler. I have got the truck serviced 3 times since I bought it for regular maintenance so that’s not an issue either. There were no warning indicators that this problem was occurring when I experienced the rear wheel lock up. This could have resulted in a collision with vehicles around me if I had not been aware of what was occurring.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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