GMC Sierra Complaints

15,732 consumer complaints on file.

#11667367June 17, 2025
POWER TRAIN
The contact owns a 2021 GMC Sierra 1500. The contact stated upon starting the vehicle and shifting to drive(D) in the morning, the transmission hesitated to shift to second gear and then shifted harshly. There was no warning light illuminated. The vehicle was taken to the dealer, where it was test-driven, but the failure could not be duplicated. The contact stated that the failure occurred once a day on first start-up of the vehicle and upon shifting to drive(D). The vehicle was taken back to the dealer over the weekend, and the dealer was able to duplicate the failure on first start-up of the vehicle and upon shift to drive(D). The dealer related the failure to TSB Number: 16-NA-361; and informed the contact the manufacturer had not made a repair available. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to file a complaint. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11667437June 17, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2021 GMC Sierra 1500. The contact stated while driving at various speeds, the check engine warning light illuminated, and the engine fan activated and operated at a very high velocity. Additionally, the message "Engine Power Failure" message was displayed, and the vehicle stalled. The vehicle was taken to the local dealer who diagnosed that the engine coolant control valve was faulty and needed to be replaced. The contact was informed that the parts were on backorder and no repairs were performed. The manufacturer was not yet contacted. The failure mileage was 45,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11667483June 17, 2025
UNKNOWN OR OTHER
The tailgate keeps dropping while driving and while parked. The key fob is in a protected area or not near truck at all when this occurs
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11667541June 17, 2025
ENGINE
I own a 2020 GMC Sierra 1500 with a 5.3 liter engine..... My engine lifters failed at 105,235 miles.... Lifter broke and damaged the Cam Shaft to a point that required full engine replacement costing me $10,800. When I asked GM for help, they denied because I went to a local repair shop with certified mechanics. I believe GM is fully aware of this problem and they are ignoring I think GM should pay for at least half of my repair bill. Thank you!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11667550June 17, 2025
ENGINE
I had an engine warning warning light on my dash around May 5th. A notice of reduced speed also lit up my dash while I was on the freeway. I scheduled a service for May 15th and was told the engine coolant flow control valve needed to be replaced. I was also told there was a backlog of other vehicles waiting for the same part. It has been over a month and I am still unable to drive my truck which I use for work.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11667176June 16, 2025
AIR BAGS, ELECTRICAL SYSTEM, UNKNOWN OR OTHER
My rear driver side door electric harness failed only two years after owning vehicle. This disables everything, including the side airbag putting passengers at risk. Most recently (2024), my radio harness failed causing ALL functions regarding infotainment system to be obsolete. Multiple electric issues and no recalls to be seen.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11667206June 16, 2025
POWER TRAIN
When driving the transmission will shift hard almost jumping forward, especially from a stopped position into 1st.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11667300June 16, 2025
POWER TRAIN
I was on the way to the airport and my vehicle suddenly went into reduced power mode and had trouble shifting into gear. I pulled over, shut off my truck, and turned it back on only to have the problem continue. I was able to turn around and make it home, but the vehicle would then not shift into reverse. We had to push the vehicle so that I could position it in the street. Once we were back from vacation, I took it to a GM Certified Service location (my local Cadillac dealership). After review, they diagnosed a defective valve body and the engine recall. I’ve been informed as of today that my valve body will be $3,000 and GM will not cover it because I have more than 60k miles on the truck (it has 72k). After research, this is a common issue and it is ridiculous that GM will not escalate the issue and help consumers with this clear problem due to their manufacturing and/or design. The vehicle is currently sitting at the dealer waiting for a back ordered valve body and I have had to go out of pocket to rent a vehicle. Every service for the vehicle has been completed at a GM Certified Service location. It is available for inspection immediately, if required.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11667315June 16, 2025
FUEL/PROPULSION SYSTEM
strong smell of gasoline nauseating, Attempted to start vehicle intense spraying of gasoline all around gas tank vehicle started – dripping profusely around gas tank over chassis frame, Rear driver side of vehicle 16 June 2025
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11667151June 16, 2025
ENGINE
Blown head gasket. Engine hydro-locked.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11667029June 15, 2025
STEERING
AT APPROXIMATELY 98,000 MILES, THE DASHBOARD ERROR MENU NOTICE TO SERVICE THE POWER STEERING SYSTEM. THIS VEHICLE HAS ELECTRONIC POWER STEERING. WHILE REVERSING AT LOW SPEED, THE POWER STEERING FAILED. I STOPPED THE TRUCK, TURNED OFF THE ENGINE, WAITED 15 SECONDS, AND RESTARTED THE TRUCK. THE ERROR NOTICE REAPPEARED AND STEERING POWER RETURNED AFTER ABOUT 15 SECONDS. DURING THAT 15 SECONDS THE STEERING WHEEL APPEARED TO OSCILLATE SLOWLY ABOUT AN INCH, THEN STOPPED. STEERING HAS BEEN NORMAL SINCE, THOUGH THE ERROR MESSAGE STILL APPEARS. I KNOW 2015 MODELS HAVE BEEN RECALLED FOR THIS SAME ERROR. I BELIEVE THE RECALL SHOULD BE EXPANDED.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11666904June 14, 2025
ENGINE
I am filing a formal complaint against GMC and R.B. Fries GMC regarding a catastrophic engine failure that occurred in my 2024 GMC Sierra 1500 Denali just over a month after purchase, with only 1,188 miles on the vehicle. The engine completely failed and had to be fully replaced. I contacted GMC and submitted a claim seeking a buyback or replacement under the Lemon Law and warranty protections. My claim was rejected, and I was offered no resolution, despite the seriousness of the failure and the fact that it occurred under normal use and well within the warranty period. This alone was unacceptable, but the situation has worsened. The truck is now experiencing additional issues, and I have scheduled an appointment with Eynon GMC (earliest available: June 23, 2025, scheduled through Karen). In the meantime, I am reaching out to other GMC dealers in hopes of getting service sooner, as I no longer trust this vehicle at all. This has been the worst automotive experience I’ve ever had. I expected a reliable product and proper customer support for a brand-new truck, especially one marketed as premium. Instead, I am left with serious concerns for my safety and financial loss. All communication is attached, and I do have witnesses for my claims including phone conversations with service and sales. As of today, I was again told by a phone call from GM that they will offer me nothing. The dealer I purchased it from has not responded. The Truck if I can find someone to take it on a trade (as most are refusing-even GMC dealers) are offering over 10K less than paid.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11666712June 13, 2025
STRUCTURE
The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving 75 MPH on the interstate, the upper lip of the front grill detached and flew over the windshield into oncoming traffic. The driver was unable to retrieve the part. There were no warning lights illuminated. The contact called the local dealer, who confirmed there was no recall coverage on the VIN for the failure. The dealer informed the contact that the part was on backorder. The vehicle was not diagnosed or repaired. The contact called another local dealer, Ross Downing Chrysler Dodge Jeep Ram (500 Westin Oaks Dr, Hammond, LA 70403) and was referred to the manufacturer for assistance. The manufacturer was contacted and confirmed that the VIN was not under recall and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 50,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11666790June 13, 2025
ENGINE, POWER TRAIN, VEHICLE SPEED CONTROL
The contact owns a 2025 GMC Sierra 1500. The contact stated while driving approximately 4 MPH and turning left into a parking spot, the vehicle independently accelerated. The contact stated that the brake pedal was depressed. The contact stated there was no warning light illuminated. The contact stated that the failure was intermittent, but the failure occurred while slowing down under 5 MPH and turning to the left. The contact had taken the vehicle to a local dealer; however, the failure was not duplicated. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 17,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11666843June 13, 2025
AIR BAGS, VISIBILITY/WIPER
Driving down the road on way home from work airbags blew out. The one in the steering wheel and the one on the passenger side. It busted windshield on passenger side. Shards of stuff all over dash on passenger side. That airbag popped 2 times.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11666867June 13, 2025
ENGINE
Driving down the highway at approximately 65mph, when I accelerated to 70mph my truck began to shake violently flashing a check engine light, service parking brake light, and service ESC light, the engine began to violently shake and make a rough knocking noise Had the vehicle towed to the mechanic where I was informed that the lifter on cylinder 2 had collapsed and that it would be $12,500 to replace all 16 lifters as well as the cam shaft on my engine My safety was at risk as my truck went into a “limp” mode and essentially shut off on the side of the road, others were at risk due to my truck becoming a hazard, the tow operator was at risk having to pickup my truck on the side of a 70mph freeway The only check engine code I had was a misfire on cylinder 2 Dealership stated that it was a known issue but that my truck was outside of warranty, and not apart of recall so there was nothing they could do Had truck towed to different shop that is repairing the problem Requested that all parts be kept in case of inspection request
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11666873June 13, 2025
ELECTRICAL SYSTEM
The manufacturer placed two 12v batteries to start the truck with one being located on the passenger side just in front of the cowl of the cab. The factory OEM batteries are known to overheat when charging which is exactly what mine did and as the battery boils over with sulfuric acid, the acid is vaporized and ingested into the cabin. It’s a diesel so it’s common for me to take my dog in the rear crew cab with me and leave the engine running so the cabin will stay cool in the summer while I work my contractor job. When I let the engine idle with windows up and AC on the overcharged battery introduced the vaporized sulfuric acid into the cabin and rendered the interior deadly toxic. Luckily I was only gone from the truck for about 10 minutes but in this amount of time the acid was very bad and caused burns in my dogs throat and mine while driving home. I can only imagine if this scenario were to take place with kids left in the truck for many reasons to stay cool but could easily turn into a deadly situation. PLEASE look into this before someone or some poor animal is fatally injured or killed.
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11666582June 12, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, but the vehicle failed to accelerate as intended. There was no warning light illuminated. The vehicle was driven to the shoulder of the road. The vehicle was towed to the dealer where it was diagnosed with metal shavings in the oil pan and engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact related the failure to an unknown recall. The manufacturer was made aware of the failure but no assistance was provided. The contact was advised to contact the NHTSA Hotline to report the safety failure. The failure mileage was approximately 120,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11666618June 12, 2025
ENGINE AND ENGINE COOLING, FUEL SYSTEM, GASOLINE
The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed and depressing the accelerator pedal, the vehicle failed to accelerate as intended. The message "Reduced Power" was displayed, and the RPMs increased. Additionally, the vehicle jerked, and the contact noticed that there was smoke coming out of the exhaust pipe. The vehicle was driven to the contact's residence. The vehicle was taken to an independent mechanic, where it was diagnosed that the starter, the battery, the fuel pump, the oil pump, the oil pump sensors, and the fuel injectors had failed and needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The contact stated that while driving at an undisclosed speed, the vehicle stalled. There was no warning light illuminated. The vehicle was able to restart; however, the failure recurred. The vehicle was driven to the contact's residence. The vehicle was not repaired. The manufacturer was made aware of the failure, but no assistance was provided. The failure mileage was approximately 133,742.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11666650June 12, 2025
ENGINE
Engine failure/ lifter issue with no prior warning. Driving down the road vehicle suddenly lost power and error message appeared. The vehicle was inspected by GM dealer and extended warranty company in late 2023. We no longer own this vehicle
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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