GMC Sierra Complaints

15,732 consumer complaints on file.

#11774096October 27, 2026
POWER TRAIN
The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving 70 MPH, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The transmission shuddered, and the vehicle drove abnormally rough. In addition, the transmission shifted abnormally hard. The vehicle was taken to the dealer; however, the failure was not duplicated. The manufacturer was contacted and made aware of the failure. The failure mileage was approximately 78,950.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11774098October 27, 2026
STRUCTURE:BODY
The upper front grille flew off and hit my windshield.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11774099October 27, 2026
POWER TRAIN
At approximately 84226 miles, the subject 2022 GMC Sierra 2500HD AT4 experienced a transmission cooler line failure. The owner’s preliminary observation is that an adjacent oil line contacted and abraded the transmission cooler line, ultimately producing a through-wall opening. Driver (Owners Son) experienced perceived issues with shifting on his drive home including surging RPM. By the time he arrived home he had concerns about it not shifting gears properly. The next day the owner noticed vehicle fluids on the concrete driveway under the vehicle. Vehicle would not engage in forward or reverse gears. Owner observed a burnt smell in the trucks’ cabin. No check engine light or similar errors were observed. Further inspection showed evidence of fluid on exhaust components.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11774106October 27, 2026
SERVICE BRAKES, HYDRAULIC
The contact owns a 2020 GMC Sierra 2500. The contact stated that while driving 65 MPH, there was a burning odor coming from the vehicle. The contact depressed the brake pedal, however, the vehicle failed to respond as needed. The vehicle was pulled over to the side of the road, coasted into a ditch, and went into a field before coming to a stop. After the vehicle came to a stop, the contact became aware that there was a fire behind every wheel, and the flames had spread to the grass. The fire was self-extinguished. The contact referenced NHTSA Campaign Number: 21V758000 (Service Brakes, Hydraulic); as the possible cause of the failure; however, the VIN was not included in the recall. The contact stated that the failure had previously occurred in 2023. The vehicle was towed to a tow yard. The failure mileage was 201,000.
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0
#11773640October 26, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM, POWER TRAIN
My truck has experienced recurring diagnostic trouble code P244B on [XXX], [XXX], and [XXX], 2026. The latest occurrence included a check-engine warning and reduced engine power. On [XXX], at 40,833 miles, Neil Huffman Chevrolet GMC in Frankfort, Kentucky, diagnosed a damaged diesel particulate filter differential-pressure sensor connector. The dealership's written estimate states that the connector had shorted, begun melting, and had broken wires at the back of the connector. I am concerned about the cause of the electrical overheating, the possibility of additional wiring damage, and the risk of unexpected reduced engine power while driving. I have also experienced intermittent transmission-related warnings and communication fault codes, although I do not know whether these problems are related. I understand there are GM technical bulletins addressing wiring-harness damage on certain 3.0L Duramax vehicles. I am not claiming these bulletins establish the cause of my failure, but I would appreciate having my experience evaluated for a possible safety-related defect trend. 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
#11773648October 26, 2026
ENGINE
Coolant control valve failure per code P1098. Known issue with a special bulletin from Duramax which claims this should be a covered replacement for this year make and model. However, dealer claims VIN is not covered
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773709October 26, 2026
STEERING, ELECTRICAL SYSTEM
My 2026 GMC Sierra AT4 HD intermittently has no power steering assistance when I start the vehicle, making it extremely difficult to steer. This occurs randomly, approximately once every one to two weeks, and has nearly caused me to hit another vehicle on multiple occasions. A few months ago, the dealership inspected the truck, performed a software update, and told me the issue should be resolved. However, the same problem occurred again after that service visit. I contacted the dealership and requested another service appointment and a loaner vehicle because I need transportation to work. I was told there is a waiting list for loaners. GMC customer service has opened a case and is contacting the dealership to help arrange service sooner. The steering issue remains unresolved, and I am concerned it could cause a collision.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773785October 26, 2026
ELECTRICAL SYSTEM:12V/24V/48V BATTERY
The contact owns a 2024 GMC Sierra 3500. The contact stated that while the vehicle was parked, the contact attempted to start the vehicle however, the vehicle failed to start. Upon inspecting the vehicle, the contact became aware that the battery was drained. The battery was recharged. The contact stated that while driving, there was an abnormal odor inside the vehicle. The vehicle was taken to the dealer where it was diagnosed and determined that the battery was overheating. The contact was informed that the battery needed to be replaced. The vehicle was repaired. The manufacturer was contacted and made aware of the failure. The contact was informed that an incompatible battery was installed in the vehicle. The failure mileage was approximately 48,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773801October 26, 2026
STRUCTURE
The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving at 70 MPH, the attachments used to hold the front grille deflectors in place fractured and the front grille detached. The contact associated the failure with NHTSA Campaign: 25V060000 (Structure); however, the VIN was not included in the recall. The dealer was contacted. The manufacturer was contacted by phone and made aware of the failure. The manufacturer stated that the repair was not covered because the VIN was not included in the recall. The contact was referred to the NHTSA Hotline to report the issue. The failure mileage was approximately 69,450.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773856October 26, 2026
FUEL/PROPULSION SYSTEM, ENGINE
After the recall was completed for the propulsion update and oil weight of 0-20 to 0-40 the truck started experiencing engine jerking and noise while driving. The MPG decreased significantly after the engine was replaced at 22k miles, driving on the interstate cruise control at 80mph the engine seized and I was almost smashed by a simi-truck. No steering, no power whatsoever. I was pulling on the steering wheel to get the truck off the freeway and out of the way. Fast forward around 70k miles, all the while I could deal with loss of MPG after engine replacement. No problems. Then came the recall and reflashing of the firm/software and a few months later I was making an u-turn when all a sudden the engine made a loud bang and bad tapping noise came from the engine. I could barely make it to the dealership where I bought the truck maybe 2 miles from where it happened. The dealership service center had the truck for a week then told me to come pick it up there is nothing they could do under warranty. All valve lifters except #3 are blown. GMC says the engine is not under warranty and I must pay $17k for a new engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773480October 25, 2026
ENGINE
My 2024 L87 already had the recall done and was changed over to 0w40 oil. Driving down the road at 70 mph the engine just shut off and I had to coast to the side of the road. Checked engine codes and found p0016. Had to have the truck towed to the dealership where they replaced the engine. Clearly the 0w40 did not fix the problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773502October 25, 2026
ENGINE, UNKNOWN OR OTHER
My vehicle has the loss of propulsion recall 25V-274. It was in for service on 5-12-2025 with NO REMEDY YET on my paperwork. 8-6-2025 the truck was in for service and passed the test that would have required immediate engine replacement. As per the recall, I was given different oil as a remedy for a faulty engine. Despite passing the test, I still lost propulsion on 6-11-2026. I was traveling on the highway at night, crested a hill and noticed while coasting that the engine was not running and the dash said "hit the start button again." When I did this everything turned off including the lights. I was still traveling at 65 MPH without lights. Luckily I didn't panic and the lights came back on when I hit the start button again. Once the vehicle coasted to a stop; and I put it in park the motor restarted. This incident was reported on 6-14-2026, complaint number 1174-4867. When I submitted this complaint, I started that GM needs to make a change so hitting the start button when the engine has stalled doesn't turn the lights off. The vehicle was towed to the dealership, they had it for two months, put around 1000 miles on it and returned it to me with no repairs made because they couldn't reproduce the problem. They returned it to me on 7-29-2026. They did not to the engine. I radio repair was unsuccessful so it went back to the dealer that same day. 8-10-2026 Vehicle return without repairs to the radio or engine. 10-10-2026 On my second drive on the highway since having the vehicle returned to me, the engine shut off again on the highway at 65 MPH. After coasting to a stop, the engine would not restart and it was towed to the dealership. They have the vehicle and are repairing the engine. My concern is that this vehicle passed a loss of propulsion recall, still had loss of propulsion twice. I have concerns for my safety in this vehicle. I do not have confidence the current repairs will not result in another loss of propulsion.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773548October 25, 2026
TIRES, TIRES:TREAD/BELT
This form would only let me select one tire, but all four tires on our truck are like this. They have pretty severe cracking/tread degradation. The mileage is 25,687. This happened suddenly. We have our tires rotated every 3,000 miles. The tire size is 275/50/R22. This appears to be a manufacturer defect. Our truck is garage stored and all paved and highway miles. We have scheduled to have them replaced right away.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773433October 24, 2026
STRUCTURE:BODY
The top trim above the grille flew off at 70mph causing the vehicle behind me to swerve almost side swiping a vehicle in the center lane.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773156October 23, 2026
FUEL/PROPULSION SYSTEM, VEHICLE SPEED CONTROL, STEERING
I was returning from the airport in [XXX] with my kids, driving northbound on [XXX] when my truck engine turned off without warning. The truck began to slow down while I was surrounded by traffic going roughly 70mph. I had difficulty steering and braking because the vehicle engine was off. I attempted to restart the vehicle while it was coasting and slowing to dangerously low speeds in interstate traffic. The vehicle would not turn back on. I managed to change lanes through traffic and get to the emergency shoulder of the roadway and stop. I was shaken up over the incident, feeling very anxious about nearly causing an accident on the interstate. My kids were also very scared. I had the truck towed to the dealership after hours and had to get someone to pick my kids and me up on the side of the interstate with our luggage. The next day the service department diagnosed the failure of the fuel control module causing the engine to turn off and, as a result, the power steering and power brakes to fail. I was without my truck for over a day while it was being repaired. This is a known problem with GM vehicles, many models having been recalled for this very part failure. This should definitely be something that should be recalled and fixed in all GM vehicles with this part, including my vehicle which has not been recalled for this. I paid for the repair and would like also for GM to reimburse me for the expense. I have attached the invoice. 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
#11773206October 23, 2026
STEERING, ENGINE
This morning it seems as if my 6.2L GM motor threw a rod. All the initial sounds and check engine information point toward that. I will be taking it to a dealer to confirm the issue. Data center driving ability and sounds indicate steering was affected as well or is somehow connected.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773272October 23, 2026
ELECTRICAL SYSTEM, ENGINE
Three different times now (most recent: 10/22/2026), I have had my truck completely shut off when coming to a stop on the highway/interstate. I always have auto start/stop disabled when I drive. When it happens, a message shows on the dash that says press start button. No other codes or check engine light. Thankfully it has started every time, but this is obviously a serious safety concern. After the second time it happened, I had the dealer (Woodhouse Buick GMC Omaha) look at it on 9/14/2026, but they couldn't find anything since there were no codes. I'm not sure if it is an electrical issue or this is related but my audio will stop working at times as well. Nothing from the radio or any blinker sounds. Sometimes it's static with a high pitch noise. 2026 GMC Sierra Elevation 5.3 EcoTec3 v8 10 speed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773333October 23, 2026
POWER TRAIN, ENGINE
I own a 2020 GMC sierra AT4. It has developed a shudder when cruising on the highway or driving in town around 1500rpm. I believe it is coming from the transmission. A local shop mentioned the torque converter. The shudder feels like a delay in power and makes it difficult to hold speed or accelerate when needed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772891October 22, 2026
STRUCTURE
The contact owns a 2023 Chevrolet Silverado 1500. The contact stated that while driving at approximately 74 MPH, the front grille deflector suddenly detached from the vehicle and struck a second vehicle. The cause of the failure was not determined. The manufacturer and local dealer were notified of the failure. The contact was informed that the VIN was not included in the NHTSA Campaign Number: 25V060000 (STRUCTURE). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 48,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772895October 22, 2026
ELECTRICAL SYSTEM
The contact owns a 2026 GMC Sierra 1500. The contact stated that while the vehicle was stopped, the GPS was not operating as intended. The system failed to update after 15 minutes. The vehicle was difficult to start and had failed to start on another occasion. The vehicle was taken to the local dealer, and an update was forced and the battery was charged. The vehicle was scheduled for a fourth repair. The failure mileage was approximately 7,329.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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