GMC Sierra Complaints (2012)

186 consumer complaints on file.

#11758047August 19, 2026
TIRES:SIDEWALL
The contact owns a 2012 GMC Sierra 2500 equipped with Armstrong Tires, Tire Line: Tru Trac HT, Tire Size: 245/75/17, DOT Number: 1E6DAE022625. The contact stated that the vehicle was taken to an independent mechanic for a routine tire rotation but was informed there were massive bubbles on the tires, and on one tire, there was a bulge the size of an apple on the sidewall of the tire. The contact replaced the tires. The local dealer was not contacted. The manufacturer was contacted and declined to accept the mileage claim and requested photos of the tires. The tire failure mileage was approximately 27,000. The vehicle failure mileage was approximately 146,500.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11756257August 11, 2026
SERVICE BRAKES, ELECTRICAL SYSTEM, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
June 29, 2025, Driving on the St. Francis loop in Amarillo, TX, brake lights start flashing, the warning sounds happening, no brakes. I had already slowed down to 35-45 mph due to road construction ahead. I weaved through the cones and as soon as possible, hit the ditch and then coasted to a stop. (I didn’t think about the emergency brake, in my panic.) I turned the vehicle off and called my husband. I decided that I wasn’t pulled over far enough over in the ditch, so I started the pickup again. The lights and warning signals for the brakes were gone and when I pressed on the brake pedal, there were brakes again. I drove home at 35 mph, knowing I could use the emergency brake at that speed, if needed, and had brakes all the way home. GMC Bender repaired truck. After driving approximately 3 miles since repaired, our daughter took the truck to Grease Monkey. She was at the garage door; employee said the pickup didn't need an oil change. She backed out and didn’t have brakes (no warning lights or sounds) and as the truck continued backing, it hit the Grease Monkey sign at the east end of their lot and broke it, knocked the sign over. An employee walked over to see what happened, she told him that she didn’t have brakes. He sat in the pickup seat and pushed on the brakes and said, yes, you don’t have brakes! The police were called, and the officer who showed up took pictures, gave us his card, talked with my husband and talked to the Grease Monkey boss. August 6, 2025, I called GMC Bender Service Department (11 mins. 8 secs.) I told them what had happened. They sent a tow truck to bring the pickup back to their shop. September 16, 2025, my husband texted me saying GMC Bender said that the pickup shows another EBS Modulator Fault. No new parts… used one would be $1293 installed. A week to get it here, no guarantees. There's more details, but the vehicle cannot be repaired to guarantee brakes will work properly. Please help us know what to do next.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11739589May 22, 2026
SUSPENSION, UNKNOWN OR OTHER, POWER TRAIN
They should be responsible for repairs or replacement of the cheap made frames that rust away so fast so u ain’t gotta worry about your truck fallling apart going down the rd and the lower control arms made of cast that rust from inside out and you don’t know until breaks while driving along with camber adjustments where they can throw alignment out with a single bump. Mostly the frame replacement is major always having to plate frame or check to make sure it will be able travel long trips or haul stuff in bed or a trailer with breaking or falling off truck causing wreck frame repair is major and time consuming if you don’t have proper stuff and definitely expensive and lower control arms that’ll make a wheel come real fast and it’s time consuming and expensive too but very dangerous and breaks and causes damage right then and there at high or low speed on highways or interstates
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711216January 15, 2026
POWER TRAIN
The contact owns a 2012 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the transmission unexpectedly downshifted, especially between second and third gears. The check engine warning light was intermittently illuminated. In addition, the contact stated that the engine felt as though the engine mounts were inoperable. The contact pulled over to the side of the road and turned off the vehicle. The vehicle was restarted, and the vehicle resumed normal driving. The vehicle was taken to the dealer; however, no cause for the failure was found. The vehicle was not repaired. The contact stated that the failure persisted. The manufacturer was made aware of the failure, but no assistance was offered. The failure mileage was approximately 20,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11709666January 8, 2026
UNKNOWN OR OTHER, AIR BAGS
Our Dash board cracked very badly from the top next to the speaker to the passenger side air bag. We purposely use a dash board cover and never place heavy things on it. This is a safety issue as if getting in an accident wouldn’t be bad enough flying shrapnel would be worse. We just had it fixed at a dealership to the tune of $2500. This is not okay as I see this is a constant problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11682085August 21, 2025
ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER
Odometer Fraud. The contact purchased a 2012 GMC Sierra 1500. The contact stated that it was discovered that there was a mileage discrepancy. The vehicle was a private sale. At the time of purchase, the mileage was 111,000, and at the time of registration, it was discovered that the mileage was 243,000. The Carfax Report indicated that the vehicle was serviced at 149,000 and 179,000 miles, then registered at 149,000 and 179,000 miles on August 8, 2024. The contact had filed a police report with the Dillon Police Department -Special Ops Police Department.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11652682April 3, 2025
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
P0521 has been addressed/replaced almost nine (9) times. “Low Oil Pressure-Stop Engine” is another one that is not completely functional. The truck is using oil but we cant find evidence of leakage. Services performed at dealership or certified shop. Troubleshooting was performed, Im told. I cant vouch for the quality of the workmanship. This should not be an issue at this mileage 100,100 ohe hundred thousand miles and oil components going bad is not good. GMC has sold me a truck that needs a new engine component. Please help. Thanks [XXX] 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
#11644587February 24, 2025
UNKNOWN OR OTHER
I'm following up on tracking number 11642264 that was submitted on Feb 12th for my 2012 GMC Sierra 2500 HD ignition lock issue that fits the profile for a current recall . I haven't heard anything and am checking on the current status. Thank you. [XXX] 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
#11642264February 12, 2025
UNKNOWN OR OTHER
My 2012 GMC Sierra falls under recall number 14V827000 Ignition lock activator by year, make and model, but not by the VIN number. I called the GMC 800 number and they indicated that the NHTSA issues the recalls not the manufacturer. I then called the NHTSA and they indicated that the manufacturer issues the recalls. I just need to have VIN number [XXX] added to recall number 14V827000. Thank you. 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
#11624777November 12, 2024
AIR BAGS
The contact owns a 2012 GMC Sierra 2500. The contact received notification of NHTSA Campaign Number: 21V051000 (Air Bags); however, the part to do the recall repair was not yet available. The local dealer and an unknown dealer were contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect. .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11592379June 4, 2024
AIR BAGS
The contact owns a 2013 GMC Sierra. The contact stated that while driving at 70 MPH, she lost consciousness. After regaining consciousness, the contact discovered that the vehicle had crashed into two vehicles and that the driver's side air bag had deployed. The police and paramedics arrived at the scene; however, no one involved in the accident needed immediate medical assistance. A police report was filed. About a week after the accident, the contact stated that they began to develop open sores on both arms as black metal fragments began to leak out of these sores. The contact went to the doctor and was treated for the injuries and was referred to a dermatologist for further assistance. Upon investigation, the contact linked her injuries to the Takata air bag recall. The vehicle was towed to the contact's home and an independent mechanic was able to repair certain parts of the vehicle to make it drivable. The manufacturer was notified of the failure and a claim was filed. The contact was also informed that an inspector would be sent to inspect the vehicle. The vehicle had been repaired. The failure mileage was approximately 312,000.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11590951May 28, 2024
SERVICE BRAKES, WHEELS, VEHICLE SPEED CONTROL
Faulty Tire Pressure Management system. Looking for recalls or service bulletins.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11578132March 18, 2024
UNKNOWN OR OTHER
Manufacturer interior defect - Crack on dash w/potential to crumble all the way in Diminishes vehicle
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11576679March 11, 2024
UNKNOWN OR OTHER
Frame rot behind gas tank truck doesn't even have 90000 Miles on it unsave to drive poor frame quality
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11560212December 14, 2023
STRUCTURE:BODY
Major major frame and wheel well rust , ever one I see is exactly the same , I live in upstate ny and yes we use salt but I've done a lot of research and the problem is country wide , please do some things this isn't right , I'm not trying to get a new free truck , just not get screwed out of the one I have cause it will fail inspection soon
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11559780December 12, 2023
STRUCTURE:BODY, SUSPENSION
I went to get the vehicle inspected today and was told it failed due to the chassis frame in the rear being rusted thru. This could cause the suspension to collapse any time. I see on the internet that multiple others have and are experiencing the same with the Sierra and Silverado. My vehicle has unlimited washes and has been washed 40 times a year and looks new from the outside.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11558123December 2, 2023
ENGINE
Lifter Failure: I was traveling to a State Park in Northern Michigan when my engine starting running very rough with major power loss. My check engine light activated, and I pulled over as soon as I could. It was dangerous because I was pulling a camper and I had to drive well under the speed limit. The Certified Chevy Dealership discovered a collapsed lifter and Cam damage. They considered this as catastrophic engine failure, and I was completely shocked as the vehicle had roughly 129k miles on it. There was no indication of failure prior to this incident as the vehicle ran perfect. I am very disappointed in GM as I have a co-worker with the same year truck that had the exact same issue shortly after I did. A friend of mine also had this happen with a 2014 vehicle of same make and model. It appears that this is a common issue with GM's newer 5.3 engines which used to be extremely reliable (99-07). GM needs to fix these lifter issues because a newer technology engine should last much longer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11555714November 17, 2023
STRUCTURE:FRAME AND MEMBERS
The contact owns a 2012 GMC Sierra 1500. The contact stated that during a vehicle inspection, the contact was informed that the sub frame was severely corroded with holes. The vehicle was taken to an independent mechanic, who determined that the sub frame needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11542551September 5, 2023
ELECTRICAL SYSTEM, POWER TRAIN
Driving on the expressway around 60 mph when the truck went into limp mode slowing me down to 40 and then would not shift gears Tcm went out gm told me that there is a big problem
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11541273August 28, 2023
ENGINE, FUEL/PROPULSION SYSTEM
Truck is a diesel. Fuel pump blew up and died in the middle of the street. Now I'm being told the Fuel system needs completely re done and will cost me 10g. I also found a lawsuit for this issue as well.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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