GMC Sierra Complaints (2025)

179 consumer complaints on file.

#11696564October 30, 2025
VEHICLE SPEED CONTROL:ACCELERATOR PEDAL
The contact owns a 2025 GMC Sierra 1500. The contact stated that while tapping the accelerator pedal, the vehicle suddenly accelerated. The contact stated that the tires were squealing. The contact drove over a cement barrier after depressing the accelerator pedal. There were no warning lights illuminated. The local dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted but no assistance was provided. The failure mileage was approximately 7,800.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695954October 27, 2025
ELECTRICAL SYSTEM, BACK OVER PREVENTION: WARNINGS, FORWARD COLLISION AVOIDANCE: WARNINGS
My vehicle is equipped with multiple safety systems offered by general motors. Since purchasing my vehicle new, I have had a persistent and recurring issue related to the vehicle safety system, which is resulted in numerous collision detection and advanced cruise control service is not functioning as designed, creating safety issues for both myself and potentially other motorist on the road. Additionally, the parking sensors are not working as expected, presumably due to the same issue, which has resulted in numerous safety concerns, including the detection of vehicles or objects, which were not present, resulting in the systematic breaking function engaging posing a risk to myself and surrounding motorists. I initially reported the issue to GM on 2/20/2025, when the vehicle had 467 miles on the odometer. Since the issue initially began, I have returned to the GM service department at my local dealer a total of seven (7) times. The local service department has been in contact with GM corporate office related to the issue, however, they have been unable to rectify the issue and continue to send the vehicle back out on the road claiming the issue has been resolved only for it to recur shortly thereafter. I believe that GM providing the safety features in an inoperable state poses great risk to the general public, and the NHTSA should investigate this issue alongside the other active systemic issues GM is currently under investigation of. At this time, it is unknown what is the cause of the issue, multiple parts have been replaced, and the true cause of the issue has been undiagnosed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695701October 26, 2025
STEERING
i experience a steering wheel shimmy between the speeds of 70- 75 miles an hour
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695282October 23, 2025
STRUCTURE:BODY
The accident occurred when the tailgate opened without warning or any buttons being pushed while towing a boat trailer. The tailgate become bound between the truck and trailer. The tailgate was damaged and limited my ability to turn the truck. My truck is normally parked in a garage and doesn’t sit in the weather. This truck is my 3rd vehicle so it doesn’t really get driven unless it is pulling a trailer, I tow with it all the time but very rarely use the bed or tailgate. Monday June 16 – Drove from Gallatin, Tn – Eddyville, Ky – Paducah, Ky the weather was constantly heavy rain and wind. Tuesday June 17 – Drove from Paducah, Ky to Defeated, TN more of the same bad storm. There were 3 of us and no one opened the tailgate, we hooked up to my boat and drove less than a quarter mile to the boat ramp, when we arrived, the tailgate had opened and the stairs on the boat had impacted the small part of the tailgate during a right turn. Prior to leaving the driveway and after hooking up the boat I had to back up slightly and remove pressure to remove the chock block from the boat trailer tires. (I would have noticed that the tailgate was open) this happened with no warning, put me and my passengers at risk and did over $1000 dollars in property damage. I was expecting GM to replace the parts that were faulty and the small part of the tailgate that was damaged. I returned twice to Larry Stovesand GMC and had them access the switch. They have refused to supply paperwork from those visits and have become dismissive and deceptive. The contact there is Craig Morgan [email protected]
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11695335October 23, 2025
ELECTRICAL SYSTEM
The vehicle will loose all interior audio to include stereo, turn signals, and all other audio safety features for several hours at a time. GMC has done three repairs and still no resolution. Lack on audio impacts the safety of the vehicle. Has happened dozens of times and appears to be larger GM issue that is u resolved. Has occurred at least 20 times since I bought the vehicle 10 months ago.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693732October 16, 2025
EXTERIOR LIGHTING
Backup camera is not usable at night, you cannot see anything on the camera unless it is a brightly it area. This causes safety concern for people and property. Dealer confirmed no issues with the camera and that is how it is. Had to add external light to ensure I could see at night.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693775October 16, 2025
ENGINE
The engine seized and locked up leading to a catastrophic failure of my three month old 2025 GMC Sierra Denali at approximately 3,181 miles. The engine, the 6.2L V8, was listed as a recall engine by GM for model years 2021-2024. My 2025 allegedly "passed inspection" yet had the same catastrophic failure. The vehicle engine made loud noises and it sounded like parts were breaking. The vehicle no longer starts and had to be taken via flatbed to the dealership where I was informed the engine had to be replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693164October 13, 2025
POWER TRAIN
The vehicle has a vibration and stuttering feel during highway driving. Cruise between 70-75 has off and on again vibration is seat, steering wheel, and center console. The issue feels more pronounced between 60-65 and exhibits more of a hum, much like a washing machine drum that is out of balance. I have had the truck at 2 different dealerships and they have insisted it was a whee balance issue. I have also had the truck balanced at Costco. None of these issues have been alleviated with wheel balance. The dealership, where the truck was purchased, refused to test the truck at highway speeds and would only drive it for a short period at speeds up to 55mph. I have also reached out to GMC customer service, and they simply regurgitated what the dealer indicated about balance and testing at 55 mph or less in town. There seems to be a number of TSBs out on this issue. Most related to torque converter issues, but none of the dealers have indicated that my truck is impacted by any of the current TSBs, even though it exhibits all the symptoms. Not sure of the safety replications, but I am disappointed in the fact that the truck has had this issue since around 1,000 miles, and it seems like the dealer service departments are just ignoring it and refusing to do a thorough evaluation of the issue unless a code triggers or until a major failure occurs
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11692152October 8, 2025
EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI, EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM)
See attached document for complaint.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691951October 7, 2025
ENGINE
We were towing a fifth wheel camper with our truck on an interstate highway in Pennsylvania when our serpentine belt burst suddenly and without warning. Our truck is a 2025 model with only 10,000 miles driven. We lost all power steering and power brakes of both the truck and the camper and the motor shut off while we were driving at 65 mph. My husband struggled to gain control of the truck and camper which was severely fishtailing and was eventually able to get over to the shoulder and stop the vehicles. We were towed to a GMC dealership where a factory technician happened to be on site providing an in-service for the dealership's service team. He inspected our truck and we were told that he said that GMC is aware of catastrophic failures in these serpentine belts. We were also told that he took photos and was sending a report to the GMC factory regarding our situation. When the serpentine belt blew, it damaged fan blades, shroud, oxygen sensors and our air conditioner belt (which fell off 200 miles later). We had absolutely no warning of the sudden catastrophic failure of the serpentine belt and came close to losing our lives. Our biggest concern is that the serpentine belt was replaced with the exact same model of belt that failed. What does it take for a company to recall a known defective belt? A fatality? We were very fortunate to have walked away without injury or losing our lives. We have written a letter to GMC but they have not contacted us as of yet.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11689336September 24, 2025
ENGINE
- On 9/23/2025 while driving down the main street, the vehicle unexpectedly shut down (engine stopped running) and would not restart. The vehicle is currently at Elevation GMC (Boone ,NC) waiting to be diagnosed. - Safety was put at risk by the vehicle unexpectedly shutting down in the middle the of rush hour traffic and not being able to be moved. - When it is was towed into the dealership and explained to the service manager what happened; she said "there is a known problem with the gear select lever losing communication with the truck and not knowing what gear it is in". - As of 9/24/2025; dealership has not looked diagnosed what the problem is/was. - There were no prior warning messages before the engine shut down.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11688990September 22, 2025
ELECTRICAL SYSTEM, STRUCTURE:BODY
--Radio power button inoperative --Radio channel change buttons, to left of steering wheel inoperative (everyday) --Radio volume inoperative -just stops working (sometimes) --Radio “HOME” button, left of radio power button inoperative --Driver door mirror wobbles when above 50 MPH (very distracting when driving) --Driver door hard to close and out of alignment --Dealership is selling the vehicles KNOWING some of the issues are present, but not advising the buyer. My safety is/was at risk due to having to move my hands off the steering wheel to touch the radio display to make any changes while driving. A certified GM service dept confirmed all my issues and could not repair. They quoted a PIT 6408. However, this particular PIT does not address my issues/concerns.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11688037September 18, 2025
SERVICE BRAKES, ELECTRICAL SYSTEM, ENGINE
I purchased a 2025 GMC Denali a few months ago. At approximately 7,000 miles, the front brakes failed unexpectedly and were replaced by the dealership. However, by 14,000 miles, I began experiencing brake issues again. Before I could return the vehicle for service, I was driving on the turnpike when the engine suddenly seized without warning. This created an extremely dangerous situation—vehicles behind me nearly collided as I lost power and control. I managed to pull over safely, but the tow truck operator struggled to load the vehicle due to all four wheels locking up and the engine being completely seized. Once the vehicle was inspected at the dealership, I was informed that the engine had failed and would need to be replaced. I am aware of the recurring issues associated with the 6.2L GMC engines and related component failures, and I no longer feel safe driving this vehicle. Given the repeated mechanical failures and the serious safety risks involved, I am formally requesting that GMC initiate a buyback of this vehicle. I believe this situation qualifies under lemon law protections and warranty obligations, and I urge GMC to take immediate action to resolve this matter.
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
#11685255September 5, 2025
SERVICE BRAKES, HYDRAULIC
The contact owns a 2025 GMC Sierra 2500. The contact stated that while depressing the brake pedal to come to a complete stop, the brakes made a loud whistling and squealing sound. There were no warning lights illuminated. The vehicle was taken to the dealer, Bellamy Strickland Chevrolet GMC (145 Industrial Blvd, McDonough, GA 30253); who was unable to determine the cause of the failure. The dealer informed the contact that it was a known issue with no fix for the failure. The vehicle was not repaired. The vehicle was taken to a second dealer, who was also unable to diagnose the vehicle. The manufacturer was not informed of the failure. The mileage was approximately 5,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11684263September 1, 2025
ELECTRICAL SYSTEM, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING, BACK OVER PREVENTION: WARNINGS
I drove into my driveway put vehicle in park put my window shades up and vehicle went into drive and hit my garage.i had no warnings and this was caught on my ring camera.the ring camera caught my headlights lite up on outside edge and lights kept blinking off an on like there was some kind of glitch.my.the vehicle did not brake either.i saved the video. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11684291September 1, 2025
ELECTRICAL SYSTEM
The cameras will work after the vehicle sits for awhile like after it cools down. But once driving or letting the vehicle run awhile the cameras shut down. I think the Video Processor Module gets hot and shuts down. General Motors is looking into this issue
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11684049August 30, 2025
STEERING
While towing a less than 2000 lb trailer I had total loss of power steering when speeds dropped below about 5 mph. I got off interstate and was turning right at the end of exit ramp and I could barely turn the vehicle. At the next stop sign it did the same thing. I stopped turned off the vehicle and restarted it and it continued this for the next few miles. Then just as suddenly as it started it stopped doing this and worked fine the rest of my trip.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11683541August 27, 2025
SERVICE BRAKES, STEERING
Hose from power steering pump came off causing truck to loose power steering and brakes. Fortunately we had just exited the interstate and were in a parking lot when this occurred. Truck was towed 90 miles to dealer who confirmed that hose was incorrectly installed by factory
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11683187August 26, 2025
ELECTRICAL SYSTEM, FORWARD COLLISION AVOIDANCE: WARNINGS, LANE DEPARTURE: WARNING
On August 15th, 2025, I brought my new 2025 GMC Sierra 1500 Denali to Bill Cramer GM Dealership, 2251 W 23rd St, Panama City, FL 32405, due to a complete loss of audio in the cabin. This affected the turn signals, radio, and critical safety alerts, including collision warnings and seatbelt reminders. Given the vehicle's high cost and its status as a new premium model, this malfunction was both disappointing and alarming, particularly due to its implications for safety. This occurs about every third time I drive the vehicle. The dealership retained my vehicle for over a week to diagnose and address the issue. I received an email stating that the service was complete and the truck was ready for pickup. However, upon arrival, a service technician informed me that they could not identify the cause of the audio failure and, consequently, no repairs were made. I was told the dealership would continue consulting with General Motors' corporate engineers to determine the cause and solution.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to GMC Sierra