GMC Sierra Complaints

15,732 consumer complaints on file.

#11765281September 18, 2026
SUSPENSION, ENGINE
Both of my upper ball joints wore out and one broke as I was driving down the road at 65 miles an hour pulling me into the on coming lane of traffic, there was no warning of this. I had both upper and lower ball joint replace. If there had been another vehicle coming in the on coming lane we would have had a head on collision. At an earlier date the motor in this same truck had a fallen lifter which cause my motor to loss power, I was able to take it to the local GM dealer and they fixed it, there was no warning this was happening either. I am worried I will have a catastrophic engine failure and GM will not cover this. I have looked up my
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765310September 18, 2026
STRUCTURE:BODY
I own a 2024 GMC Sierra 1500 Elevation. The front upper grille molding/trim has become loose and is separating from the vehicle. The attachment points/clips are no longer securely holding the molding in place. I am concerned that the molding could completely detach while driving, particularly at highway speeds, creating a road hazard for other motorists. The vehicle has not been involved in a collision or other event that would explain the failure. I have photographs documenting the loose molding and believe this is a potential safety defect that should be investigated.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765327September 18, 2026
ENGINE
My 2026 GMC AT4X 6.2 liter engine had a lifter fail for #5 cylinder due to a faulty designed crankshaft bearing causing a knocking with the engine running. It required the engine to be replaced by GMC at only 7100 miles. The dealership admitted it was a defective/incorrectly manufactured part that caused the failure. I wanted to report this since GMC had said this issue had been corrected on the 2026 model year engine, but I have been reading that this issue is still occurring in the new vehicles and at a very low mileage instance. Mine failed at only a little over 7,000 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765344September 18, 2026
ENGINE
While driving 40 MPH my entire dash lite up with every known light and the vehicle lost all power. The dealer stated I need an entire engine replacement, as with Many 6.2. My vehicle is 1 months out side of the recall, it has the exact symptoms and the exact damage as the recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765373September 18, 2026
ELECTRICAL SYSTEM, ENGINE
The contact owns a 2026 GMC Sierra 1500. The contact stated that while at a stop light, the engine shut off to save fuel, but after releasing the brake pedal, the engine failed to restart. The contact shifted to park, and the engine restarted. The contact stated that the failure had occurred on several occasions after the fuel saving feature was deactivated. Additionally, the contact stated that the failure had occurred while slowing down and driving over a railroad track and hauling a trailer. The vehicle was taken to the local dealer on several occasions, but the failure was not duplicated. The manufacturer was notified of the failure. The failure mileage was 4,300.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765414September 18, 2026
STRUCTURE
The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving 65 MPH with her children in the rear seats, the top of the chrome front grille detached and damaged the windshield. The contact associated the failure with NHTSA Campaign Number: 25V060000 (STRUCTURE); however, the VIN and the model year was not included in the recall. The approximate failure mileage was 51,350.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765423September 18, 2026
ENGINE
I am reporting a catastrophic engine failure on my GM vehicle equipped with the 6.2L L87 V8 engine. This failure occurred AFTER the official recall remedy (Recall 25V-274/ GM Recall N242494000) was performed on my vehicle, which directly aligns with NHTSA's active investigation under Engineering Analysis EA26005. The recall service was completed by an authorized GM dealership on XXX at 22,489 miles, the vehicle had the L87 Engine Loss of Propulsion recall completed and the PICO L87 Diagnostic Testing was completed and passed with recommended updated oil change to Mobil 1 Supercar 0W-40 (19432866) quantity 8 with 12737081 Filter and Cap Changeout. On XXX, at 26,752 miles, the engine suffered a catastrophic total mechanical failure. While driving, the vehicle experienced a sudden loss of motive power and a complete shutdown with no prior warning of any kind while driving down [XXX] at approximately 45 to 50 MPH. This created an immediate safety hazard on a public roadway. The vehicle was towed to Key GMC in [XXX] where technicians confirmed Engine Seized Up. Spun connecting rod bearings at cylinder 7&8. The vehicle was at the dealership awaiting parts for repair for 65 days due to engine backorder (engine, radiator, starter, cooling lines and miscellaneous parts ultimately replaced). Because this failure occurred after GM's official remedy was implemented, the recall clearly failed to correct the underlying safety defect. I request that NHTSB include this incident in its ongoing evaluation GM's 6.2L engine issues under EA26005. 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
#11765436September 18, 2026
AIR BAGS, UNKNOWN OR OTHER
A driver hit me in the side of the car at around 70 mph to where it bent the frame of the truck and the airbags did not deploy causing a major issue and my daughters head to hit the side window.no warning lamps and it’s currently at a body shop right now
Crash:
Yes
Fire:
No
Injuries:
3
Deaths:
0
#11765437September 18, 2026
AIR BAGS, UNKNOWN OR OTHER
Air bags didn’t deploy after being hit so hard in the side it bent the frame and my daughters head head hit the side window
Crash:
Yes
Fire:
No
Injuries:
3
Deaths:
0
#11764889September 17, 2026
SERVICE BRAKES, ELECTRICAL SYSTEM, ENGINE
Battery voltage low and required a jump to start. Advised battery had to much resistance. Drove to dealership. Upon pulling out on to highway without warning sudden engine loss and stalls. Steering column locked and shortly after the brakes locked up making it to where the vehicle could not be moved. This is a major safety issue and WILL lead to a fatality. My drivers side door exposed to oncoming traffic on a highway. 2 tow trucks, multiple technicians to coordinate keeping jumper cables on long enough to keep the brakes functioning to move the vehicle. Once the power was lost the vehicle seized. This happens on an actual interstate or railroad crossing YOU WILL HAVE FATALITIES!! This vehicle needs an immediate recall and pulled off the road! It took 6 hours to get this truck moved! This happens on the interstate or railroad crossing and sits for that duration due to everything locking up people will die as a result!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764905September 17, 2026
UNKNOWN OR OTHER
The tailgate opened without my knowledge on my first drive home from the dealer. I was pulling my trailer at the time, when I backed into my driveway it pinched against the trailer and damaged the tailgate. There were no warning lights or anything to tell me it came open. The dealer examined it and found nothing wrong with the systems. It was raining on my way home and I know they've had problems with that in the past. While this incident didn't lead to any accident, it very well could have. I'm a sub-contractor, I haul a lot of tools and product that I rely on that tailgate keeping it all contained. If it comes down without any warning it could easily lead to a major accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764967September 17, 2026
STRUCTURE:BODY
The hood molding flew off my vehicle as I was traveling down the interstate. I did not hit anything, it just randomly flew off of my vehicle. The piece flew off and just barely missed the vehcile behind me. If that would of hit the other vehicle, it would of caused damage to their vehicle, and potentially could of caused an accident. The piece that fell off was the trim piece that is diretly below the hood latch and above the front grille. There was no incidcators that this was going to happen. I see there was a recall on the same model and year vehicle as mine but for chrome grilles. The recall # is 25V-060.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764993September 17, 2026
UNKNOWN OR OTHER
NUMERO DE VIN FALTANTE
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764998September 17, 2026
ENGINE
Driving vehicle at normal speeds and engine suddenly shut of and stopped in the road. would not restart. Had to get it towed to dealer who diagnosed problem as a seized up engine and need a new engine replacement
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765013September 17, 2026
ENGINE
On 9-5-26 while on interstate 75 going about 75 miles per hour truck started losing propulsion and speed started dropping. No warning light or anything. Navigated over to shoulder turn truck off for about 5-10 minutes and started back. On 9-8-26 on the way from Dr. appt. starting truck up it acted like it didn't want to start but did. Eventually stopped at red light and truck died and wouldn't start. Dash board lighting up and when trying to start the engine would not turn over. No warning light or anything. Truck towed but had to drag on the wrecker due to wheels locked up. On 9-16 GMC advised engine fail and will need replacing at 12,000 miles. VERY UNACCEPTABLE FOR 2024. Truck was bought new in October 2023 with 4 miles. Found out it is a known issue with the 6.2 V8. Be careful. We could have been killed in the flow of traffic and truck losing power with no warning. Couldn't even turn hazard lights on or anything. 18 wheelers coming all around and we trying to navigate to safe spot on the shoulder when we was on the interstate. GMC need to get their stuff together, you are putting people lives is danger. GMC is feeling our anger right now. Who wants a new engine in a $90,000 top of the line truck
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765016September 17, 2026
POWER TRAIN, ELECTRICAL SYSTEM, ENGINE
The contact owns a 2025 GMC Sierra 1500. The contact stated that while driving approximately 5 - 10 MPH, the vehicle went into LIMP Mode and failed to properly accelerate, and the transmission unexpectedly downshifted. There was an electrical malfunction, which caused the transmission to downshift. An unknown message was displayed on the instrument panel. The contact stated that the network was not operating at the correct voltage due to the wiring harness. The engine light illuminated after the failure. The vehicle was towed on two occasions to the dealer to attempt to duplicate the failure. The dealer was unable to determine how to repair the vehicle. The vehicle was driven to the dealer in LIMP Mode. The manufacturer, General Motors, was contacted by the dealer, and the contact also reported the failure to the manufacturer. A General Motors service engineer had inspected the vehicle. The failure mileage was approximately 34,637.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765024September 17, 2026
POWER TRAIN
Vehicle purchased Certified Pre-Owned in October of 2021 with roughly 43,000 miles. During the first service (47,598 miles) at a GM dealer I reported very hard shifts, but this issue was ignored during service. At the next servce (54,571 miles) I again reported the hard shifts and "surging" when coming to a stop but the dealer reported they were unable to replicate the issue and did not address it. At the next service (61,620 miles) I reported the issues with the transmission once again and this time they performed a transmission fluid flush/replacement, acknowledging the issue and asking me to drive for 200 miles and return if the issue was not fixed. I returned at 62,058 miles as the issue was not resolved and they replaced the torque converter. During my next visit (68,709 miles) I reported the issue was still present but was informed they would not address it as I was now outside of warranty. I reported this to GM but was told to pay for a diagnostic and repair and "hope" that the dealer would elect to cover it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764633September 16, 2026
ENGINE
On 9-10-26 Engine spun rod bearings per the dealership repair order Miles 52,796 I was towing a car on a car trailer traveling down the interstate when the motor failed. I had my wife in the truck with me. No prior warnings just a check engine light right before engine failed. GMC dealer replaced engine and returned on 9-14-26. The truck had already had the recall to check the engine and replace the oil to a thicker oil.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764636September 16, 2026
SERVICE BRAKES
Turned on vehicle and an alert popped up "Brake system control module malfunction", limited speed to 43 miles per hour, no power breaks worked. I have had no issues with brake system for the first 11k miles. I contacted my local GMC dealership (Banks Chevrolette in Concord, NH) and was told that I would not be able to get an appointment until the 2nd week of November. I told them this was a break system issue covered under warranty and they told me I was welcome to DRIVE to their dealership (14 mi away on INTERSTATES and CITY STREETS) and wait to see if there was any time to plug it in, but they would not guarantee there would be time on their end. I spoke with the service manager and was told the same and that his advice was to "not drive it until November". I was able to take the truck to a shop in town 2 mi away , and they printed off the following codes: P25A U160F U1610 U2418 U2419
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11764641September 16, 2026
ENGINE
While driving down the street pulling a trailer the engine stopped. I was able to get it to the side of the road. I called the GMC dealer and they dispatched a wrecker. No prior warnings, just a check engine light right before it failed and lost momentum. This is the second of three new trucks from GMC with engine failure, 1st was lifters, and the other two were bearing locked up. All maintenance was performed by the Dealership on all three trucks
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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