GMC Sierra Complaints (2025)

179 consumer complaints on file.

#11664238June 1, 2025
VISIBILITY/WIPER
The backup camera on the new 2025 GMC Sierra 1500 AT4 is not displaying a visible picture at night. During the day time, the picture is clear. At night, you cannot see nearly anything. This is and has been widely reported online. This poses a massive safety threat to pedestrians, pets, other vehicles, and property; due to the night vision malfunction. Please make this a RECALL on GMC to prevent any catastrophic occurrences. This is unacceptable for any 2025 vehicle and the law requires all new vehicles must have backup cameras. It must be a requirement that the cameras function in BOTH day and NIGHT.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664044May 30, 2025
SERVICE BRAKES, STEERING
Experienced loss of power steering, loss of brakes
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11663238May 27, 2025
BACK OVER PREVENTION
The contact owns a 2025 GMC Sierra 1500. The contact stated that while shifted into reverse(R) at night, the rear-view camera image was very dark, creating a hazard while reversing. The contact stated that during daylight, the image was perfect; however, at night the reverse lights failed to provide adequate illumination, causing objects on the display screen to be very dark. The contact had taken the vehicle to a local dealer to be diagnosed and was informed that there was no failure of the back over prevention system, rear camera, reverse lights, or display screen. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was 2,682.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662707May 23, 2025
POWER TRAIN
Transmission fluid overheating, which is a known issue in other GM models with 6.6L diesel with 12 speed allison transmission. Confirmed by warning message received on dashboard and transmission fluid temperature gauge. This occurred within 3 weeks of purchase. Dealer confirmed “Valve” needs to be replaced. Part is on back order with no arrival eta. Service advisor indicates the truck is not safe to drive and remains in the service department.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660867May 14, 2025
VISIBILITY/WIPER
The passenger rear view mirror is completely flat, not concave like every other mirror we’re used to on a passenger vehicle. This mirror glass is only used on the passenger mirror of the EV trucks for some unknown reason. It is completely unsafe in such a large truck without huge blind spots. Because it appears to be zoomed you can completely miss cars otherwise viewable in blind spot. This also makes setting the passenger mirror up for towing very challenging and also dangerous. In addition the software for the backup titling mirrors works as designed for about 20 seconds and then while still backing moves the mirrors back to the normal position making backing a trailer for example dangerous.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660464May 12, 2025
TIRES:SIDEWALL
I am reporting a potentially serious and widespread safety defect involving Goodyear Wrangler TrailRunner AT tires installed as factory equipment on General Motors trucks. My 2025 GMC Sierra 3500HD Denali has just 5,800 miles. Both rear tires, with DOT code 2724, have developed identical sidewall bulges behind the “NER” in the “TrailRunner” stamp. These bulges are consistent with internal structural failure, not road hazard damage. The truck has never struck a pothole or curb, and there is no evidence of impact or external damage. I have personally inspected several brand-new GM trucks on dealer lots, equipped with the same Goodyear tires, showing the exact same sidewall bulge in the same location. These trucks also have newer DOT Manufacture date stamps. Most importantly, these vehicles have never been driven, which strongly suggests a tire manufacturing defect, not a driver-related issue. At my first scheduled service, the dealer’s service department refused to rotate the tires, citing the bulges as a safety risk. I filed a formal complaint with GM and requested that they involve Goodyear. GM denied the request, claimed the damage was from road impact (without evidence), and stated that the decision was final and not disputable. They refused to conduct any further investigation or escalate the claim. I believe GM’s refusal to act on a potential structural defect, especially one seen across multiple new vehicles, demonstrates a failure to exercise due diligence and exposes the public to unnecessary danger. A blowout from these bulges could lead to serious injury or fatal crashes. I am urging NHTSA to open a defect investigation into Goodyear Wrangler TrailRunner AT tires, particularly those with DOT code 2724 and newer, as installed on GM trucks. I am prepared to submit photographs and dealership documentation as necessary.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11659885May 9, 2025
UNKNOWN OR OTHER
The truck is not even 2 weeks old and driving down the road at less than 50mph the sunroof exploded. Nothing fell on the sunroof and no other vehicles were near the truck at the time the sunroof busted.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658783May 4, 2025
ENGINE, FUEL/PROPULSION SYSTEM
I WAS DRIVING ON A PA ROAD AT ABOUT 30 MPH. MY CAR STOPPED IMMEDIATELY AND I HEARD THE MOTOR REV. THE CAR THEN SLAMMED INTO A STOP.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658354May 2, 2025
STRUCTURE:BODY
Tail gate has opened twice while driving down the road.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11656822April 25, 2025
STRUCTURE:BODY, ELECTRICAL SYSTEM, UNKNOWN OR OTHER
2025 GMC Sierra 1500 shifted from Park to Drive uncommanded, accelerated uphill, and crashed while idling, keyfob outside of vehicle, March 2025. ESIS couldn't replicate and falsely claimed I didn't put it in Drive, despite photos and no one inside.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11654688April 15, 2025
POWER TRAIN
Failure in the lithium-Ion battery system. Battery conditioning system failed to manage heating and cooling of the battery system leading to catastrophic system failure. Dealership and manufacturer are unable to make repair leaving the vehicle un-operable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11649886March 22, 2025
ENGINE
Purchased the vehicle 300 miles away. Flew out, picked up the truck and drove it home. Got back Saturday night. Woke up Sunday morning to review the features, etc. Noticed a major oil leak. Called the dealership I purchased it from. They told me to take it to a (local) dealership. I took it to my local dealership. They looked at the vehicle. Initially they thought it was a faulty valve cover gasket. They ordered the parts. When they actually started taking the vehicle apart, the issue was not the valve gasket but the crack in the valve cover itself. They replaced the valve cover. It went to the dealer on date 03/03/2025 and they gave he vehicle back to me on 03/21/2025. They said this crack had to of happened on the production line but before it got delivered to the initial dealership.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640628February 4, 2025
POWER TRAIN
Transmission is shifting rough
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11636913January 19, 2025
SUSPENSION
I purchased a 2025 GMC Siera Denali Ultimate in December 2024. Approximately 2 weeks after purchasing the vehicle, I was driving down the road I received a message that said, "Service Suspension". I was able to call OnStar for diagnostic and the truck was throwing code C2A0A. I took the truck into the dealership to see what the issue was. The dealership said that I apparently ran something over and it must have flown up and broke a plastic sensor cover on the lower rear left shock. I never hit anything but have no way to prove. So, I had to pay $526 for a new shock. Even if I did run over something if that area of the shock is that sensitive it should be better protected especially if it's not covered under warranty.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11636671January 17, 2025
FUEL/PROPULSION SYSTEM
Battery heating module failed. This resulted in small, hard to distinguish, "service vehicle" icon to appear on the dash with no further information. This warning icon first appeared during a long drive, then went away on its own and eventually came back. This failure would eventually make charging, particularly in cold weather, impossible and potentially stranding the occupants. The servicing dealership has confirmed this failure and is attempting to replace the module. However, parts for this replacement seem to be unavailable with no current estimated arrival.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11635955January 14, 2025
ENGINE, POWER TRAIN, STEERING
While on the freeway at 65mph the truck experience a hard gear shift, loss of acceleration, went into shut down, lost steering assist, and brakes became hard, lights came on the dash for transmission issue massage, as well as Check engine light. Safety became a major concern with loss of power in the mids of a flow off traffic at freeway speeds. Vehicle had to be towed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11634563January 7, 2025
ENGINE, VEHICLE SPEED CONTROL
The contact owns a 2025 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The check engine warning light was illuminated. In addition, the contact stated that the RPM was fluctuating while driving. The vehicle was towed to a local dealer however, the vehicle was not diagnosed or repaired due to the warranty. The manufacturer was made aware of the failure. The failure mileage was approximately 600.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11634151January 5, 2025
BACK OVER PREVENTION: WARNINGS, EXTERIOR LIGHTING
Just purchased a new 2025 GMC Sierra. The backup camera system is useless at night if not in a well lit parking lot. This make the system unsafe as you cannot detect people or objects in the field of view. I've had many GMC vehicles over the years and this is the first one with this concern.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11625297November 14, 2024
ELECTRICAL SYSTEM, ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
Intermittent loss of trailer brake function. While traveling and towing a RV trailer with electric brakes, receive a dashboard alert that trailer brakes have been disconnected. This has occurred since vehicle was new. Trailer brake system has been inspected and trailer is not the issue. Took truck to GMC dealer. They are well aware of common issue with GMC owners. GMC issued a safety bulletin 6+ months ago to dealers to replace the integrated trailer brake controller (RPO code JL1). Per reports that has not solved the issue. My truck did not fall into that safety bulletin. Customer Satisfaction Program number N232414840 says, with the brake issues caused by a potential fault in which voltage feedback occurs. This is a DANGEROUS SAFETY ISSUE.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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