GMC Sierra Complaints

15,732 consumer complaints on file.

#11769499October 7, 2026
ENGINE
While driving down interstate noticed drop in oil pressure and immediately a noise in engine with loss of power. immediately took it to dealership and they diagnosed rod bearing failure. Gm refuses to pay for engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769528October 7, 2026
ENGINE
The contact owns a 2024 GMC Sierra 2500. While the contact's husband was driving uphill approximately 32 - 34 MPH and hauling a trailer, the vehicle unexpectedly lost motive power and rolled backwards. The brake pedal was depressed, and the parking brake was engaged to stop the vehicle. OnStar and 911 were contacted. The trailer was towed to the residence, and the vehicle was towed to the dealer. The dealer determined that an unknown software update had caused the failure. The dealer performed a repair under TSB: 6318272, updated the engine control module software, and completed an oil change and tire rotation. The failure mileage was 17,520.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769533October 7, 2026
ENGINE
Truck was in motion and the engine light started blinking then stopped. A couple miles down the road the truck jilted and the engine light came on again. The Service ESC and emergency parking brake light came on. The truck started shaking. We pulled over and parked. Turn off the truck and when we turned it back on it started shaking. When we drove we started hearing popping, knocking, loss in power of the vehicle. This could’ve caused serious damage to ourselves or other drivers if we could’ve have stopped. Vehicle is being inspected. Multiple same vehicles have had the same issues in my town. At least 5 that we know of. At one point all of the lights came on and now there is just a few lights. More than what I listed earlier.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769549October 7, 2026
ELECTRICAL SYSTEM, VEHICLE SPEED CONTROL, POWER TRAIN
The gauge cluster flickers and goes blank completely while driving, over head windshield screen display still works, and throws an - Accretion speed limited- message. Truck has electronics software issues, climate control flickers, works sometimes, most times doesn’t, loose electrical connections. Over all the gmc truck is a major software glitch and GMC does not want to take accountability for there lemon product which is very costly in repairs. Gmc service is not great and the warranty period of 36,000 miles is not justifiable. My truck has 68,000 all highway miles, not city miles. 2024 gmc Denali top in its class, and still has more issues than my 2007 gmc Sierra
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769576October 7, 2026
ELECTRICAL SYSTEM
The contact owns a 2020 GMC Sierra 1500. The contact stated that the vehicle failed to start intermittently and needed to be jumpstarted. The vehicle was taken to the dealer, and it was determined that there was corrosion on the ground wire which caused the failure. The vehicle was not repaired because the vehicle was not included in Customer Satisfaction Program: N252515590 with NHTSA ID Number: 11027795 (Electrical System) for the ground wire replacement. The manufacturer was informed of the failure and confirmed that the vehicle was not covered. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 51,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769597October 7, 2026
AIR BAGS, SEAT BELTS
The contact owned a 2014 GMC Sierra 1500. While the contact's wife was driving 45 MPH, the vehicle crashed into another vehicle. The contact stated that the air bags failed to deploy, and the seat belt failed to restraint the driver as intended. The vehicle was towed to a local tow yard. The vehicle was deemed a total loss by the Insurance Company. The driver was transported to a local medical center. The driver sustained bruised left and right knees, a bruised chest and ribs, and bruised lungs. A Police report was filed. The manufacturer was contacted, and a case was filed. The failure mileage was approximately 124,000.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11769653October 7, 2026
ENGINE
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving and towing a 5,000-pound load, the vehicle made an abnormally loud sputtering sound at 3,000 RPM. The contact stated that the failure was more noticeable while towing a load. The vehicle was taken to an independent mechanic, where an audible diagnostic test was performed and the contact was informed that the sound was related to the engine bearings. The vehicle was then taken to the dealer, where it was diagnosed with fifty-two engine misfires. The contact was informed that the misfires should have caused the check engine warning light to illuminate; however, the light was not illuminated. The dealer replaced the ignition coils and spark plugs; however, the failure recurred while driving. The manufacturer was notified of the failure. The failure mileage was approximately 110,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769733October 7, 2026
STRUCTURE:BODY
My rear spoiler roof area leaks. This is something GM knows about and has sent out memos to dealers. To fix this it’s around $1000. I think GM should fix a problem they have been well aware of for sometime.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769352October 6, 2026
STEERING
The contact owns a 2026 GMC Sierra 3500. The contact stated that while driving 2 MPH, the steering wheel failed to function as intended. The contact stated that while making a right turn, the vehicle hesitated. The dealer was contacted by phone and made aware of the failure. The vehicle was taken to the dealer and the contact was informed that the vehicle was operating as designed. The contact stated that the failure was not present when the vehicle was purchased. The manufacturer was contacted, and a case was filed. The failure mileage was approximately 4,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769393October 6, 2026
STRUCTURE:BODY
I have a 2022 GMC Sierra that has a black grill and the same thing happened to me that follows this safety recall; N242490120. I was driving on the highway and the same piece snapped off and went right over my head and a car behind me ran over it and they had to pull over.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769420October 6, 2026
STEERING
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at various speeds on several occasions, the vehicle lost power steering assist. While driving 55 MPH, the failure recurred, nearly causing a semi-truck to crash into the vehicle and causing the vehicle to veer off the ramp. The contact's dog jumped out of the vehicle into the bushes and sustained a minor injury. The Brake Assist, ABS, Stabili-trak, and power steering assist warning lights illuminated, and the message "Electronic Steering Failure" was displayed after the failure. The contact turned off and restarted the vehicle, and the vehicle operated as intended. Additionally, the contact stated that the ABS seemed to fail to operate as intended. A dealer was contacted by phone and stated that the power steering control module might need to be replaced. The contact associated the failure with NHTSA Campaign Number: 17V414000 (Steering). The failure mileage was approximately 134,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769438October 6, 2026
ENGINE
Lifter collapsed at 31970 miles. It was fixed at GMC dealership. It just happened out of no where. No warning signs.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769455October 6, 2026
POWER TRAIN, ENGINE
Driving at approximately 45 mph on Berthod Pass in CO, towing a snowmobile flatbed trailer, when dash display indicated "low oil pressure, Turn off Engine". By the time I could read that, the engine was already off and I was all over the road trying to find a way to get off the highway. I did not have opportunity to get off highway, and ended up against a barrier, and partially remaining in traffic. GM towed the car (not the trailer, I had to do that myself) to a dealer quite some distance from my home as opposed to the dealer where I purchased the truck. Then they told me they towed it to a different dealer. After recovering my stuff, I went to the dealer where the truck was, and they said they couldn't look at it for several days. I could not wait several days simply to find out it was going to be a couple of months before id have the truck back. I traded it in on another, larger GMC simply to get out of that engine. What I learned though, is that GM used that exchange to make about $20K. This was more the dealer, but they are part of GM. My original truck was priced below book, and not the book the public can see, but the book they say they go by. They paid me $51K on an $87K truck for trade value. Then they sold the new truck at full price, no break. I was in disaster mode, as I had a large family gathering I was preparing for at our cabin, and did not have time to fight with them. The reason for the low book trade-in value was that the value of these trucks has plummeted because of the very reasons I was replacing it, GM's failure on those engines. My original truck had about 30K miles on it when it blew. The dealer told me that the one I was replacing it with (2026 Sierra HD with 6.6L Turbo Diesel) would get similar mileage, but that was untrue. I get about half the mileage I got in the first truck, and the price of diesel is about 20% more than gas. So they found a sucker on the first truck, then that same sucker bought the second one.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769460October 6, 2026
ENGINE, ELECTRICAL SYSTEM
We bought the vehicle on February 28th and on March10th my husband was driving on his way to work on the I95 highway and the engine shut down. My husband was in the middle of the highway with a speed limit of 65. Traffic was able to slow not to cause any more accidents however he had to be towed and GM replaced the engine. Because it had not been 30 days in the shop. Due to GM abiding by Lemon laws we were not able to qualify for a buy back. We have been fighting with them ever since. I was able to get a reimbursement of my first car payment. However, my husband is a general contractor and is absolutely terrified to accept jobs far away because we don’t know when the truck engine might give up again. All of the charging ports stop working a couple of weeks ago, we had to take it in for repairs. This is a $78,000 vehicle with 4 miles on it when we purchased it. I don’t know what it is worth now because the engine was replaced with in 10days of purchasing it. I need help!!!!!!!!!!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769463October 6, 2026
POWER TRAIN, UNKNOWN OR OTHER, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
I was driving at 70 mph on the highway. I heard clunk and then rattling and saw smoke while losing power. Check 4wd warning illuminated. Came to stop in busy traffic and where I first parked on shoulder, saw shoulder of roadway smoking and on fire. I pulled forward 100 or so feet slowly while hearing more grinding rattling cranking. Came to stop. Fire dept arrived and extinguished roadside blaze. Called towtruck and had towed to [XXX] in [XXX]. 75k miles. No warning just catastrophic failure. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0
#11769205October 6, 2026
SERVICE BRAKES
At 20 mph, the truck experienced unintended acceleration during normal braking. Light braking did not trigger the safety brake-override system, and the engine continued to pull forward until I was forced to mash the brake pedal completely down to overpower the engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769233October 6, 2026
AIR BAGS
The contact owns a 2013 GMC Sierra 1500. The contact stated that while driving approximately 60 MPH, the roof, passenger’s side curtain, and the front side air bags deployed without a crash. The contact stated that the driver’s and passenger’s side seat belts no longer deployed, and there were metallic debris coming from the air bags. The contact sustained a cut on the right leg. The vehicle was taken to a local dealer where it was diagnosed with moist air bags and corrosion that caused the failure after rainy weather. The manufacturer was made aware of the failure. The failure mileage was approximately 170,000.
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11769243October 6, 2026
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
While driving on a public road, the 6.2L L87 V8 stalled without warning. There was heavy smoke and an oil trail of about 300 yards behind the truck. The engine would not restart, and the transmission would not shift into neutral. The truck was moved a short distance off the road and towed the next day to the selling GMC dealer. Odometer was 4,663 miles. Oil life remaining was 38 percent. The truck was stock, with no modifications, and was operated on premium fuel. No warning lamp was noticed before the stall. The failed engine is at the dealer and currently under inspection. The dealer inspection is not finished, and no written cause has been provided. This is a sudden loss of propulsion. Please associate this report with Engineering Analysis EA26005 concerning connecting-rod and crankshaft failures in the GM 6.2L L87 engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769298October 6, 2026
ENGINE
Engine had catastrophic failure at only 1,433 miles driven. Incident happened on the interstate and truck was required to be towed to the dealer. Dealer said engine replacement is necessary.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11768916October 5, 2026
ENGINE
My 2020 GMC Sierra 1500 SLT with the 6.2L L87 engine experienced complete engine failure at approximately 129,000 miles. The vehicle is currently at Trent Cadillac GMC in New Bern, NC and is available for inspection upon request. The dealer confirmed the engine requires replacement along with timing-chain-related repairs, estimated at approximately $11,000. Before the failure, I had previously reported concerns involving oil pressure/engine operation to a Chevrolet dealer. At one visit, the dealer documented that it could not duplicate the oil-pressure concern. The vehicle was later serviced again, but the problem ultimately progressed to complete engine failure. When the truck arrived at Trent after the failure, no oil registered on the dipstick. This presents a safety concern because sudden engine failure and loss of power can leave a driver unable to maintain normal vehicle operation or safely exit traffic, particularly at highway speeds. After the failure, the truck was evaluated by Big Boys in Grimesland, NC and then towed to Trent Cadillac GMC for authorized GM dealer diagnosis. GM Customer Care has also reviewed my case. I am concerned this failure may be related to known failure patterns involving GM 6.2L L87 engines and internal engine components. Although my 2020 model is outside the current recall population, it experienced complete engine failure after earlier oil-pressure concerns. I am requesting this failure be documented and evaluated as a potential safety defect, including whether earlier-model L87 engines may experience similar failure mechanisms.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to GMC Sierra