GMC Sierra Complaints

15,732 consumer complaints on file.

#11755433August 7, 2026
POWER TRAIN
The failure to have proper viscosity oil along with manufacturing error resulting in failure of lifters, cam shaft, and crank shaft all needing replaced. Repair totaled over $10,000
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755472August 7, 2026
FUEL/PROPULSION SYSTEM, ENGINE, VEHICLE SPEED CONTROL
I was driving to work on 7/20/26 and my vehicle loss engine propulsion , engine failure and unable to restart vehicle and shift gears.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755572August 7, 2026
ENGINE
I have a 2026 GMC Sierra 1500 with the 6.2L engine. I purchased it on [XXX]. On [XXX] with 13,000 miles on the truck the engine started making a bad noise from the lower end of the motor. I immediately took it to the dealer Randy Wise Buick GMC in Fenton Michigan. They diagnosed it as a spun bearing and had to replace the engine. I just got it back today August 7th 2026 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
#11755159August 6, 2026
SEAT BELTS
THE FRONT PASSENGER SIDE SEAT BELT RETRACTOR IS FAILING TO RETRACT. I HAD A PASSENGER IN THE VEHICLE AND AS WE CAME TO A STOP IN MY DRIVEWAY TO EXIT THE VEHICLE SHE UNHOOKED (RELEASED) THE SEATBELT AND IT WILL NOT RETRACT. THE SEATBELT IS NOW CURRENTLY EXTENDED OUT AND WILL NOT RETRACT BACK INTO THE RETRACTOR. I PURCHASED THE VEHICLE TODAY 08-05-2026, I CALLED THE DEALER I PURCHASED IT FROM AND THEY STATE THAT THERE IS NO RECALL ON THE VEHICLE WITH THIS ISSUE. I DID LOOK THE ISSUE UP ON GOOGLE AND INFACT IS STATES A PROBLEM WITH THE SEATBELT RETRACTOR FOR MY VEHICLE. I SENT THEM A SCREENSHOT OF THE CONFIRMATION FOUND AND THEY DECLINE TO ACKNOWLEDGE A REPAIR STATING THERE IS NO RECALL. I WAS ABLE TO MANUALLY FEED THE BELT BACK INTO THE RETRACTOR, IT WAS EXTREMELY DIFFICULT BUT I SAT IN THE SEAT TO DUPLICATE THE ISSUE AND IT WILL DUPLICATE. THE SEATBELT IS CURRENTLY EXTENDED AND WILL NOT RETRACT AUTOMATICALLY. THE SHOULDER STAP WILL NOT FIT SECURELY AROUND A PASSENGER AT THIS TIME. I HAVE HAD NO PRIOR USE OF THE VEHICLE UNTIL TODAY AS I PURCHASED IT FROM A REPUTABLE DEALER WHO STATES THEY DID A FULL INSPECTION OF IT PRIOR TO SELLING BUT APPARENTLY THIS ISSUE WAS NOT REPAIRED PRIOR TO SELLING IT.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755175August 6, 2026
FORWARD COLLISION AVOIDANCE: WARNINGS, LANE DEPARTURE: WARNING, LANE DEPARTURE: ASSIST
For the past 6 months I’ve had issues with my crash avoidance system, steer assist and lane departure warning. The crash indicator light would illuminate on my dash for no apparent reason. That would disable my crash warning system, steer assist and lane departure warning but, I could still adjust my distance for my brake warning indicator. The other problems that are not safety related is cruise control and automatic high beam lights will not function. I researched the Internet and found this is not an uncommon problem for this year model. The most common fix (if the windshield is not dirty) was remove the F 11 fuse, in the fuse panel beside passenger door for 10 seconds, that would allow the system to reboot. That worked for 3 months with more than 10 occurrences of the light illuminating on the dash. Now the crash indicator light is on continuously and will not reset by removing the fuse. The computer is up-to-date and all the settings in the infotainment system for the crash avoidance system are activated. Check numerous Internet websites, the cameras for this system is on backorder. So there must be a parent problem with the system. I was required to purchase 36 months of OnStar, I did not purchase a renewal agreement after the 36 month and this issue started soon after.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755200August 6, 2026
POWER TRAIN
The contact owns a 2026 GMC Sierra 1500. The contact stated that while her husband was driving approximately 10 MPH, the vehicle unexpectedly shut off and independently shifted into park(P). The contact stated that previously, while the vehicle was idling in a parking lot, with air conditioner activated, the Auto START/STOP feature engaged, and the vehicle shut off. The message “Service Transmission” was displayed. The vehicle was taken to a local dealer and was diagnosed with transmission failure. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 2,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755269August 6, 2026
ENGINE, POWER TRAIN
"While driving, the vehicle suddenly experienced a flashing check engine light, an Electronic Stability Control (ESC) warning light, and violent steering wheel vibrations. The vehicle suffered a severe loss of power and misfired, creating an immediate traffic hazard. The dealership diagnosed the issue as a catastrophic mechanical lifter failure on the 5.3L V8 Ecotec engine with Dynamic Fuel Management (DFM). Despite the dealer replacing an entire bank of lifters, the engine continues to misfire and vibrate. This premature valvetrain failure at only 36,000 miles is a known design defect that causes sudden engine stalling and disables critical safety features like stability control while the vehicle is in motion, presenting a severe crash risk."
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755314August 6, 2026
POWER TRAIN
My 2015 GMC Sierra 1500 SLE has the 6L80 transmission. While traveling on the interstate with my fiancé, the transmission failed. It was towed to a garage and they informed me that it needed to be replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755350August 6, 2026
STEERING, SUSPENSION, SERVICE BRAKES
Ongoing issues with Steering pull to right, and brake pull to hard right when applying brakes, which also turns steering wheel to right upon application. Have to keep steering wheel towards left with constant pressure to go in straight line and when braking. Driver has to be aware of changing road conditions that could affect that. Multiple inspections at multiple dealers have found no obvious issues, and multiple alignments performed, with tires also being replaced have had no success in correcting issue. Front suspension starting to feel loose due, and rear suspension squeak when going over bumps. Also recently found rear axle is shifted slightly to right. Suspect all are related. No parts replaced to date other than the tires. Happens daily. No accidents to date. Daily driver with long trips at times. Steering pull Issue has present since new but everything else has occurred since about 1800 miles and has progressively become worse. Conditions becomes worse at highway/freeway speeds of 65 to 80, but occurs as low as 10mph. Going back to 3rd dealer to look at it again. Truck is 2026 with 10,583 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755353August 6, 2026
TIRES, TIRES:TREAD/BELT
On Saturday, XXX, at around 3:00 PM, my wife and I were traveling southbound on Interstate XXX toward [XXX] (this occurred in [XXX], just north of [XXX]). We were driving our 2023 GMC Sierra 2500HD pickup while towing our 36-foot 5th wheel trailer. I was traveling at approximately 60 miles per hour, and there was heavy traffic on the highway. Just north of Highway XXX, the passenger rear tire delaminated and went flat. The tread came off the tire, striking the wheel well, rear bumper, and tailgate of my truck, causing significant damage. It also hit the front panel of my 5th wheel trailer. The tread then flew off and struck the windshield of a vehicle traveling next to us, but fortunately, there was no damage to that vehicle. I stopped at a Discount Tire store, where the manager inspected the tire and concluded that it had delaminated, likely due to a defect in the tire. There were no warning signs before the tire failed. Before driving that day, I checked the tire pressure on all tires. According to the information on the tire sidewalls, the rear tires were set to 80 PSI before I started my trip. The tire in question was an [XXX] Goodyear Wrangler Trailrunner AT with DOT#[XXX]. I have contacted Goodyear Tire, and they have since picked up the tire for inspection in their lab. 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
#11755376August 6, 2026
TIRES, TIRES:TREAD/BELT
I bought this truck from a reputable GM dealership 2.5 weeks before this happening occurred. Tires only had 50k miles on them when they were rated for 80k miles: the front driver side Ttire ruptured while on major hwy in texas. No signs of air loss and the road was clear of any debris. Steering started to lightly shake and eventually came to a violent shake, then the front driver tire ruptured. Uncontrollable steering from the rupture caused the truck to slam and scrape into the concrete dividing barrier. If it were not for the other drivers around and being then cautioning their driving behaviors, this may have resulted fatally. Other drivers and my self may have easily collided with each other on a major traffic highway. I’m still extremely mindful of this happening again. This caused me as a customer, originally thinking this tire manufacturer is to be trusted, to not being a customer any longer as well as causing nearly $30,000 of needed repairs. From what I am reading from this site, plenty of other drivers have experienced the same, almost identical happenings. This is a safety issue that needs a recall on this line of tires and the manufacturer should be liable for all costs to the consumer witch includes vehicle rentals, hotel fees and insurance deductibles, s as well as the entire bill of repairs the insurance companies dish out. It appears from all of the complaints, Goodyear is producing unsafe products that is endangering consumers’ lives. Do the ethical thing Goodyear. Stand behind your product and protect, honor your customers. I have requested a subjugation claim with my insurance provider. The ruptured tire and related wheel are in my possession, available for inspection upon request. Police and GM roadside assistance were called as Onstar was prompted.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11754985August 5, 2026
POWER TRAIN
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the transmission was shuddering, especially while driving uphill. The dealer was contacted, and the vehicle was diagnosed and determined to have a failure associated with a GM TSB for the incorrect transmission fluid inside the transmission reservoir. The vehicle was not yet repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 38,875.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11754992August 5, 2026
UNKNOWN OR OTHER
Top Grill/Hood trim piece - it is separate from the main Grill. It detached and flew off at interstate speed. Thank God it missed several cars behind me. The passenger side corner came loose and before I could safely make my way off the interstate the piece ripped all the way across and flew over the top of the truck. May have gone 30 feet in the air prior to landing on the asphalt between the two lanes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755053August 5, 2026
POWER TRAIN
I am submitting this complaint to report what I believe is a serious safety-related defect involving the General Motors 6.2L L87 V8 engine installed in my 2026 GMC Sierra Denali. On July 10, 2026, while driving on a public highway near Bogata, Texas, the engine suddenly began making severe mechanical noises before catastrophically failing without warning. The engine seized completely while the vehicle was in motion. At the time of failure, the truck had only 13,517 miles. The sudden loss of engine power left my wife and me stranded on the roadside. Had this occurred while crossing an intersection, merging into traffic, passing another vehicle, towing a trailer, or traveling in heavier traffic, the consequences could have been far more serious.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755085August 5, 2026
ENGINE, POWER TRAIN
Ever since I bought this truck new, I noticed a lot of metal shavings and debris in the oil filter every single time I changed the oil. I took it to the dealership multiple times to have this looked into before the engine recall came out. The dealership took pictures of the metal and sent them to a General Motors engineer, but the engineer just told them it was "normal." Later on, the truck went in for the official recall inspection, passed the PICO test, and nothing was fixed. Then on August 4, 2026, I was driving on a crowded expressway right through a construction zone with absolutely no shoulder to pull over on. Out of nowhere, the truck started hesitating badly, lost power, and the engine started making a really loud knocking noise. It was barely running, and it was incredibly dangerous because there was nowhere to go and traffic was heavy. Luckily, I was able to limp the truck along just far enough to clear the construction zone and pull over safely.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755088August 5, 2026
ENGINE
Ever since I bought this truck new, I noticed a lot of metal shavings and debris in the oil filter every single time I changed the oil. I took it to the dealership multiple times to have this looked into before the engine recall came out. The dealership took pictures of the metal and sent them to a General Motors engineer, but the engineer just told them it was "normal." Later on, the truck went in for the official recall inspection, passed the PICO test, and nothing was fixed. Then on August 4, 2026, I was driving on a crowded expressway right through a construction zone with absolutely no shoulder to pull over on. Out of nowhere, the truck started hesitating badly, lost power, and the engine started making a really loud knocking noise. It barely ran, and it was incredibly dangerous because there was nowhere to go and traffic was heavy. Luckily, I was able to limp the truck along just far enough to clear the construction zone and pull over safely. the truck was towed to the dealer were they confirmed the engine was blown, and needs replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755097August 5, 2026
SERVICE BRAKES
The left rear internal "top-hat" parking brake shoes suffered a total manufacturing bonding failure, causing the friction lining to completely delaminate and detach from the metal backing plates inside the rotor hub. This triggered Diagnostic Trouble Code (DTC) C060B (Left Park Brake Actuator Circuit). The failed components were replaced by the servicing facility and are unavailable, but the official dealer diagnostic scan sheet and itemized repair invoice are preserved and available for inspection upon request. Safety was compromised in two ways. First, the mechanical failure completely disabled the electronic parking brake system, forcing a heavy-duty truck to rely exclusively on the transmission's parking pawl to remain stationary. This creates a severe rolling vehicle hazard, especially on inclines or when hauling/towing heavy loads. Second, when these shoes disintegrate, the loose friction debris trapped inside the enclosed drum can shift, wedge, and cause a sudden mechanical wheel lockup or severe brake dragging at highway speeds, threatening vehicle control. The problem was officially confirmed and diagnosed by an authorized General Motors dealership service center. The technician scanned the vehicle, retrieved DTC code C060B, and confirmed upon inspection that the internal parking brake shoes had completely disintegrated. There were absolutely no physical symptoms, abnormal noises, dragging sensations, or brake pedal changes prior to the failure, as the parking brake shoes sit isolated inside the rotor hub. The issue appeared suddenly on May 23, 2026, when the vehicle immediately displayed a parking brake malfunction warning lamp on the instrument cluster dashboard and completely refused to engage the electronic parking brake.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755152August 5, 2026
STRUCTURE:BODY
My grill deflector suddenly flew off, hit my windshield a flew into a semi hauling oil field equipment. We both pulled over and found no significant damage to his truck. I have a two inch scratch on my windshield and possibly lite hood scratching. Dealership required me to pay $390.73 but said I would be reimbursed for my losses. It never happened. Now I’m fighting with GM to get some resolution. This could be deadly for a motorcycle rider for sure. Hundreds of people reporting same issue on 22 and 23 Sierras and AT4’s.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11754684August 4, 2026
VISIBILITY/WIPER, UNKNOWN OR OTHER
The HVAC airflow-direction system failed and no longer correctly controls where the air is directed. Even when the windshield defrost setting is not selected, the system continuously sends airflow toward the windshield. This unwanted airflow causes condensation and fogging on the windshield that cannot be turned off or redirected, impairing the driver's visibility and creating a significant safety hazard. The airflow is also defective in the other ventilation zones. Air is not consistently directed to the selected dashboard, floor, or other vents, and the HVAC system does not operate as designed. This results in poor climate control and significant discomfort for the driver and passengers. The defect has been confirmed by an authorized GMC dealership. The vehicle has remained at the dealership awaiting warranty repair because the required replacement part is unavailable. General Motors has not provided a repair completion date or an estimated delivery date for the replacement part. I have found reports from other owners describing the same HVAC airflow-direction failures on GM electric pickup trucks built on the same platform. The vehicle is currently available for inspection.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11754782August 4, 2026
ENGINE, ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
I was driving on 96 W. in slow traffic on the freeway when the vehicle put itself in neutral and shut off
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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