GMC Sierra Complaints

15,732 consumer complaints on file.

#11741954June 4, 2026
ENGINE
On June 1, 2026 driving eastbound on I-64 in Louisville, KY. Engine shut-off warning popped up and engine immediately shut off. There were no prior warnings or unusual engine or noises. 3 passengers in car. Had to change 2 lanes and then onto shoulder while coasting and slowing down. Car was incapacitated and gave battery and 0% oil read. Oil is changed regularly and engine recall work had been performed on truck several months prior. Car at dealership, not analyzed or repaired yet.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741983June 4, 2026
VEHICLE SPEED CONTROL, POWER TRAIN, UNKNOWN OR OTHER
Transmission blew on a 7 year old vehicle. Was replaced entirely and is NOW having the EXACT SAME PROBLEM AGAIN!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741809June 3, 2026
UNKNOWN OR OTHER
The screen shakes. Goes black. Zooms in randomly without prompting. Started dialing up people from recent calls. While trying to get the navigation working. I started drifting into oncoming traffic. Fortunately was able to course correct and avoid collision. Buttons are most time not responsive to touch. It is distracting. The system has never fully worked as promised and is a distraction. And as a result a serious safety hazard.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741822June 3, 2026
POWER TRAIN
The contact owns a 2022 GMC Sierra 1500. The contact stated upon shifting to park(P) and attempting to turn off the vehicle, the message "Shift to Park" was displayed. The contact waited and attempted to park and turn off the vehicle again, and the vehicle responded after several attempts. The vehicle was taken to the dealer, where it was diagnosed that the shifter assembly needed to be replaced due to internal short to the solenoid not allowing the vehicle to detect that it was in park(P). The vehicle was being repaired. The manufacturer was notified of the failure and a complaint filed. The contact was referred to the NHTSA Hotline to report the failure. The failure mileage was approximately 24,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741852June 3, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2021 GMC Sierra 1500. The contact stated that while The vehicle while operating the vehicle a knocking noise was present coming from the engine and the check engine warning light had remained illuminated. The vehicle was examined by an independent mechanic who diagnosed that the engine valves had malfunctioned and engine needed to be repaired. The vehicle was not yet repaired. The manufacturer was notified of the failure but no assistance was offered. The manufacturer was notified of the failure. The contact was informed that the VIN was not included in the NHTSA Campaign Number: 25V274000(ENGINE AND ENGINE COOLING). The contact indicated that the vehicle had experienced that same failure listed in the recall. The failure mileage was 98,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741871June 3, 2026
UNKNOWN OR OTHER, POWER TRAIN
Transmission, going towards home up a mild hill, broke top of hill trans shifted to next gear, rear wheels locked up and tires squealed. doing around 40 mph. Took it directly into the shop, and the trans was destroyed inside. broken parts in the pan. Trans could not be repaired, had to get a new transmission. I limped to the dealership, just noisey under vehicle. There was special coverage till 115,000 mile, had 97,062 miles on it. Just like it blew up inside. I was without a vehicle for 5 weeks, but I did have an extended warranty which it paid all of it except $ 1404.01, and I had to pay 2 weeks of car rental for 893.00. The transmission $ 6782.97 , and I would like reimbursement for what I paid. I could only go 10 to 15 mph to the repair shop, which was 7 miles away. GM states it was something else at the dealership, but it was parts all over inside of the pan when they took it apart.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741918June 3, 2026
VEHICLE SPEED CONTROL, POWER TRAIN
The truck side toy down shift and the accelerator was very high…. When I was going to park the reverse was not shifting…
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741938June 3, 2026
UNKNOWN OR OTHER
Vehicle will not consistently shut off. Shift to park error received upon trying to shut vehicle off. Concerns on if the vehicle is actually in park and if it is safe to exit vehicle. Concern that vehicle is not in park and electrical units aren’t being properly shut down (i.e. radio).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741495June 2, 2026
ENGINE
6.2L crankshaft failed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741547June 2, 2026
ENGINE, SERVICE BRAKES, STEERING
Incident description: On three occasion I have had the same catastrophic Engine failure putting myself and my family along with the general public in harms way. Starting March of 2022 while driving at approximately 60 MPH on the West Shore Expressway my truck experienced a sudden and total loss of motor power. My engine stalled out and I lost my ability to safety steer and stop my vehicle. This all happened during rush hour while driving in the left lane of traffic. This sudden loss of power forced me to maneuver the vehicle to the right shoulder of the expressway across the right lane of traffic. As there was no shoulder to pull over on the left side of the highway. This created an immediate crash risk for myself and other drivers. Upon inspection at the authorized GMC dealership where I purchased the truck new, a certified mechanic determined that the engine experienced a complete failure requiring replacement or rebuilding of the engine. I paid to have the engine rebuilt at the dealership. The second instance was similar to the above incident. Once again I paid for the repair. The third instance was more dangerous as when my trucks engine failed it almost caused an accident. As of today my truck is still sitting in the dealership for over 6 months and no one from the dealership or manufacturer will give me an answer on what has to be done now. This patter of sudden repeated engine failure clearly indicates a systemic safety defect that extends beyond normal wear and tear. I urge the NHTSA to open a defect investigation into the 2018 GMC Sierra 1500 engine systems.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741595June 2, 2026
SERVICE BRAKES
After the latest update from the Dealer, the integrated trailer brake module no longer shows an output of how much power it's applying to the trailer brake system. It just stays blank. I can tell that the brakes actually are being applied, however not having indication of them being applied and how much pressure is applied is concerning.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741465June 2, 2026
EXTERIOR LIGHTING, ELECTRICAL SYSTEM
The contact owns a 2019 GMC Sierra 1500. The contact stated that the trailer lights flashed intermittently while the vehicle is turned off. Additionally, the contact stated while driving with a trailer hitched to the vehicle, the messages "Trailer Disconnected" and "Trailer Connected" were intermittently displayed, and the running and marking lights were inoperative. The contact related the failure to GM TSB Numbers: 20-NA-198 (Trailer Running Lights Shut Off Due to Excessive Load on the Running Lamp Circuit), PIT5747B (Diagnostic Tip - Trailer Lighting Complaints with Trailering App RPO U1D) and N192213550 (Service UpdateTrailer Integration Module Software Error). The vehicle was taken to an independent mechanic, where it was determined that the failures were due to a wiring or software failure. The contact was informed that the failure was a factory defect because the fuses were in good condition. The vehicle was not repaired. The dealer and the manufacturer were not contacted yet. The failure mileage was approximately 64,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741474June 2, 2026
ELECTRICAL SYSTEM
Fire started under passenger side front seat dashboard when rear defrost was turned on.
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0
#11741189June 1, 2026
STEERING, ELECTRICAL SYSTEM, POWER TRAIN
power steering locked up while driving. multiple dash lights turned on, on its own after the issue, 4wd, emergency brake, abs, and other ones im not sure what they are. took it to the dealership for a recall and told them the issue that happened.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741190June 1, 2026
STEERING, POWER TRAIN, ELECTRICAL SYSTEM
power steering locked up while driving. has been inspected and repaired by manufacturer. recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741215June 1, 2026
ENGINE
While driving approximately 45 MPH, I slowed to make a right turn into a parking lot. The engine suddenly stalled and lost all propulsion. The vehicle retained electrical power but automatically shifted into NEUTRAL, and would not shift back into DRIVE. I braked to a stop, temporarily stranding the vehicle and blocking traffic in the parking area. Attempting to turn the vehicle off via the START/STOP button actually restarted the engine, confirming the stall. The truck then shifted into DRIVE and operated normally. A subsequent OnStar diagnostic scan found no active trouble codes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741236June 1, 2026
ENGINE
Engine seized at 23,291 miles, approximately 3,661 miles after GM's authorized dealer performed a PicoScope inspection under Recall N252494000 and certified the engine as passing. July 2025 recall attempt was documented as incomplete with no remedy available. November 2025 inspection passed the engine. Engine seized March 2026. New engine installed under Special Coverage N252494003. New drivability concern — hesitation and lurch at low speeds — appeared immediately after the repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741251June 1, 2026
ENGINE
Heard clanging noise under hood as I was driving and truck just stopped. Tried to restart and nothing! Towed to dealership where they found the engine has to be replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741277June 1, 2026
ENGINE
Catastrophic engine failure the connecting rod went through the block. It is my understanding that Defective Components: Manufacturing defects in the connecting rods and crankshafts can reduce oil film strength, leading to severe wear, metal debris, and catastrophic engine could be the proiblem
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741282June 1, 2026
POWER TRAIN, FUEL/PROPULSION SYSTEM, ENGINE
The vehicle received the official N252494001 recall oil remedy on 06/27/2025 at 15,438 miles (but suffered catastrophic engine failure and loss of propulsion at 33,661 miles on 05/30/2026).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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