GMC Sierra Complaints

15,732 consumer complaints on file.

#11686554September 11, 2025
STEERING
My power steering completely failed. This is a safety issue and could have caused bodily harm. I have looked on line and I am not the only one with this issue, and as I investigated it shows that this issue was recall situation on earlier models. My truck is currently in the shop and looks like it will cost $5,000 to do the full repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11686606September 11, 2025
POWER TRAIN
The contact owns a 2023 GMC Sierra 2500. The contact stated that while driving approximately 35 MPH, the vehicle went into LIMP Mode, and the message "Service Transmission" was displayed. The vehicle was taken to the dealer, where it was diagnosed that the transmission valve body rod had failed. The valve body rod was replaced. It was unknown whether the vehicle was repaired. The vehicle remained at the dealer. The manufacturer was not notified of the failure. The failure mileage was approximately 44,546.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11686699September 11, 2025
ELECTRICAL SYSTEM
When I’m in reverse the up the cameras turn off. On one incident I was backing up and the camera turned off causing me to back up into the wall of my house
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11686729September 11, 2025
STRUCTURE:BODY
The door handle broke off on the driver side the passenger side door handle will not open the door the outside handles are loose and the rear back driver and passenger side will not open their doors.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11686769September 11, 2025
SUSPENSION, VEHICLE SPEED CONTROL, STEERING
Vehicle is being remotely hacked and placed into regen Parts have been swapped and truck has been tampered with and continues to be tampered with
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11686255September 10, 2025
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
I am experiencing a recurring issue with my 2021 GMC Sierra where the dashboard displays a “Shift to Park” warning even though the vehicle is already in Park. This typically occurs when I attempt to shut off the vehicle. The doors unlock as expected, confirming the truck is in Park, but the warning prevents me from turning off the ignition immediately. After a few seconds, the warning usually disappears, allowing me to shut off the truck. This issue is more frequent in cold weather, suggesting a temperature-sensitive electrical or mechanical fault. Based on research and community reports, this appears to be a known issue across multiple GM vehicles, often linked to a faulty micro switch or wiring harness in the shifter assembly. I am concerned about the safety implications, especially if the vehicle fails to shut off properly or if the issue worsens over time. GM has not issued a recall for this problem, and I believe it warrants further investigation due to its widespread nature and potential risk.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11686290September 10, 2025
POWER TRAIN
MY TRUCK IS EXPIERANCING THE SYMPTOMS OF RECALL # N242454440 TRANSMISSION VALVE BODY, ITS SHUTTERING BETWEEN SHIFTS AND CLUNKING IM AFRAID OF THE REAR WHEELS LOCKING UP FROM THE HORROR STORIES I HAVE READ THE TRUCK IS AT COULTER GMC NOW FOR EXACT DIAG BUT FROM EVERYTHING I HAVE READ THIS IS COMMON ISSUE FOR THIS RECALL THAT MY VIN DOES NOT FALL UNDER FOR SOME REASON
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11686343September 10, 2025
STRUCTURE:BODY
The upper part of the grill detached on my 2023 GMC Sierra 1500 while going 65mph on the higway. The part is about 4 inches wide by 6 ft long. People behind me in traffic were swerving and dodging to avoid hitting it. GM knows about this problem (see safety recall #N242490120), but the scope of the affected vehicles is incorrect, so my truck is not included. There were no signs that the part was going to fail before hand.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685985September 9, 2025
POWER TRAIN
The contact owns a 2024 GMC Sierra 2500. The contact stated that transmission fluid was leaking onto the garage floor. The contact stated that while driving at an undisclosed speed, the transmission hesitated before shifting. The contact stated that the check transmission warning light was illuminated. The vehicle was taken to a local dealer; however, the dealer was unable to diagnose the vehicle. The vehicle was not repaired. The contact had inquired if the transmission needed to be replaced, and was informed that transmissions were on a national back order. The manufacturer was not informed of the failure. The failure mileage was 8,808.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11686032September 9, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to pull over to the shoulder of the roadway, where the vehicle failed to restart. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); the VIN was included, but parts were not yet available. The manufacturer was not notified of the failure. The failure mileage was 60,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685943September 9, 2025
STRUCTURE:BODY
After completion of a recall fix by the dealer for the grill while driving the front grill deflector detached striking the front hood and top of the cab before flying behind my vehicle barely missing a following vehicle and settling alongside the road. I pulled over, inspected the front of my vehicle to assure it was safely drivable. Once I removed loose pieces I returned and retrieved the top grill from the roadside then drove directly to the dealer who completed the recall fix. They have ordered a full grill for replacement. The recall fix/repair failed within day of completion. GM Program # N242490120 Status Complete NHTSA 25V060 Date Issued: 2025-02-06 Description General Motors has decided that a defect which relates to motor vehicle safety may exist in certain 2022 model year GMC Sierra 1500 vehicles equipped with chrome front grille deflectors. One or more of the attachments that hold the front upper grille deflector in place may fracture over time. If all eight attachment points break, the deflector may detach from the vehicle while driving. Safety Risk Description If a front grille deflector detaches unexpectedly while driving, there is increased risk of a crash. Repair Description Dealers will reinforce or repair all attachment points on the chrome front grille deflector. Recall Completed 2025-08-21
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685950September 9, 2025
ENGINE AND ENGINE COOLING
See attached document for complaint.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685668September 8, 2025
POWER TRAIN
Initially experienced hard clunking sound when transmission shifting between 35-40 mph. I took in for service and dealership replaced EGR sensor. The problem was not resolved with this fix. I took the vehicle back for service and the dealership then did a software/system reset. I then drove my truck with towing a trailer to San Diego and upon exiting the freeway, the back tires locked up causing a screeching of the tires which caused my vehicle to swerve. I felt as though this could have caused an accident. Shortly after, the engine light came on and my vehicle went into “limp mode”. A dealership in San Diego then told me that the valve body plate would need to be replaced. According to the internet this seems to be an ongoing issue with this year’s vehicle, yet no recall has been issued by GM. I understand GM has issues a special warranty coverage #N242454441 providing extended warranty for control valve issues. I’ve been told my VIN is not included for this special warranty when it is the exact same issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685671September 8, 2025
VISIBILITY/WIPER, UNKNOWN OR OTHER
My issue is with my back up camera being useless in low lighting and dark situations. I live in a dark community sometimes and I cannot use my back up camera to get me down my driveway without opening both front windows. I had a 2016 GMC Sierra and I had no problem with it. I first brought it into the shop with this issue and they replaced the camera and that did nothing. The 2nd time I brought it in for the camera issue, they said it is a software issue and they are waiting for a fix. (That was back in June) I called GMC Customer care and opened a case, but that is falling on deaf ears as they are saying there is nothing they can do. They tell me to keep waiting on the dealership for the fix. My Daughter, son and friends are having the same issue, but they are adding additional lights. I refuse to do that, as I think GMC should take care of it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685689September 8, 2025
ENGINE
The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving approximately 40 MPH, there was an abnormal knocking sound coming from the engine compartment. The contact stated that several unknown warning lights were illuminated, and several messages were displayed. The vehicle was driven to the side of the road to safety and turned off. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure milage was approximately 76,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685727September 8, 2025
POWER TRAIN, POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:SHAFT:OUTPUT
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving 15 MPH, the vehicle briefly jerked and jolted, prompting him to discontinue driving the vehicle. The vehicle returned to normal functionality, but the failure became a regular occurrence. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed failures with the output shaft speed sensor and the transmission control module. The vehicle was not repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 89,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685740September 8, 2025
ELECTRICAL SYSTEM, VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
The contact owns a 2021 GMC Sierra 3500. The contact stated that while his wife had the vehicle idling with the rear defroster activated, shortly afterwards, she observed smoke coming from the plastic on the rear sliding window. After a visual inspection, the contact's wife observed that the plastic was melting, prompting her to deactivate the rear defroster. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 26,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685741September 8, 2025
ELECTRICAL SYSTEM
Power button (to turn on and off) to radios does not work, the "home" button to the left of the radio power button does not work.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685816September 8, 2025
UNKNOWN OR OTHER
The OnStar system has failed, which eliminates collision detection
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685572September 7, 2025
POWER TRAIN
Bought a 2023 gmc sierra 2500 duramax. Went into limp mode took it to dealership the transmission was bad so they replace transmission after 3 month of dealer having my truck . Got the truck back still having issues with transmission not shifting right and the rear tires locking up at highway speeds .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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