2015 GMC Sierra 1500

719 complaints on file, page 1 of 36.

1. Filed Sep 25, 2026Failure Sep 13, 2026Duxbury, MAEngine

   In August, 2019, at 93,672 miles, GM covered a lifter failure on our 2015 GMC Sierra, V8 AFM engine. Only the left side was repaired. Now, in 2026 at 130,000, the right side has the same issue and needs repair. The estimate to repair is $16,697. This is a known issue and a safety concern.

   NHTSA complaint 11766980
2. Filed Sep 22, 2026Failure Jul 18, 2025Fort Myers, FLPower train

   The transmission Started Shuddering, it would slip occasionally and slipped badly when i was driving in rush hour traffic in the middle of a left turn. had no power for several seconds then it finally reengaged. The shuddering got worse and worse to the point i took it to a transmission shop to look at it and they said i needed a replacement transmission unit. I did get a replacement unit, the whole process was extremely unpleasant. The previous unit was sent as a core to be remanufactured. The company that i used to get a remanufactured unit is Fraser Transmissions. No warning lamps appeared prior to the transmission acting up.

   NHTSA complaint 11766154
3. Filed Sep 10, 2026Failure Sep 10, 2026Waterloo, ILElectrical system, Power train, Steering

   Power steering seems to be lost for a second or two at low speeds turning. Happens multiple times a day.

   NHTSA complaint 11763463
4. Filed Aug 31, 2026Failure Jun 15, 2026West Des Moines, IAElectrical system, Steering

   My 2015 GMC Sierra 1500 recently started having all the symptoms under GM internal recall number 18289. I lose my power steering briefly and the electronics turn off momentarily. I lose dash, AC, radio and GPS. It comes back on within a second or two and only does this during low speed turning. I ran my VIN but it does not show under this recall despite having the correct Make/Model/Year. It is currently at the shop because it isn't safe to drive and I was hoping I could get a reimbursement for the repairs. NHTSA Campaign Number: 18V586000 (GM's Internal Number: 18289)

   NHTSA complaint 11760877
5. Filed Aug 21, 2026Failure Jun 6, 2026Virginia Beach, VAStructure

   See attached document for complaint.

   NHTSA complaint 11758571
6. Filed Aug 20, 2026Failure Dec 5, 2023Stonewall, LAElectrical system

   From time to time since I got the vehicle, the lights flicker inside and out. I've had the alternator changed but it continues. Then when pressing the lock button on the key fob the horn sounds as if it has a shortage. Sometimes its loud and sometimes it's barely heard.

   NHTSA complaint 11758124
7. Filed Aug 6, 2026Failure Nov 11, 2025Bennington, NEPower 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.

   NHTSA complaint 11755314
8. Filed Jul 12, 2026Failure Nov 15, 2025Bottineau, NDVisibility/wiper

   my rear window defrost turned on when i auto started my pickup. i realized it was on after about a half hour and looked back and my drivers side of the rear sliding window was shattered completely

   NHTSA complaint 11749832
9. Filed Jul 7, 2026Failure May 1, 2026Southaven, MSService brakes

   When backing up, either on a hill or flat surface, the brakes fail to stop the vehicle. There is a pulsing sensation with the brakes due to failure of the vacuum. The brake pedal also becomes impossible to depress. No warning lights appear when this occurs.

   NHTSA complaint 11748839
10. Filed Jun 8, 2026Failure Jun 7, 2026153,000 milesSaginaw, MISeat belts

    The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at 25 MPH, the front driver's seat belt completely failed. The lap belt portion came apart, causing the chest strap to loosen. Upon inspection, the contact observed that the steel anchor cable bolted to the floor had separated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 153,000.

    NHTSA complaint 11742780
11. Filed May 26, 2026Failure May 26, 2026Greene, RIElectrical system, Power train, Unknown or other

    For no apparent reason the truck goes into “low power mode” and gives off code p2138 often happens around 30-35 mph. Have had it happen to me also around 45 mph also. I have replaced sensors and parts to which a month or so goes by and it happens again.

    NHTSA complaint 11740204
12. Filed May 16, 2026Failure May 11, 2026Blythewood, SCService brakes

    Vehicle doesn't stop in low speeds

    NHTSA complaint 11738356
13. Filed May 13, 2026Failure May 13, 202690,100 milesLawrence, KSBody control module/bcm, Service brakes, Hydraulic

    The contact owns a 2015 GMC Sierra. The contact stated that while driving at an undisclosed speed and also while the vehicle was parked, the ABS and stability control warning lights would unexpectedly illuminate. The vehicle was taken to an independent mechanic, where the warning lights were cleared. The contact was informed that if the failure recurred, the EBCM and BPMV would need to be replaced. The vehicle was not repaired. The contact stated that the failure recurred. The vehicle was then taken to the dealer, where it was diagnosed that the EBCM and BPMV had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 90,100.

    NHTSA complaint 11737603
14. Filed Apr 20, 2026Failure Apr 9, 2026Camden, SCEngine

    Active Fuel Management Miss firing Idle rough Shaking Loss of power #7 cylinder loss of all compression Bad fuel mileage Skipping

    NHTSA complaint 11732442
15. Filed Mar 30, 2026Failure Mar 21, 2026218,000 milesBerryville, ARAir bagsCrash

    The contact owns a 2015 GMC Sierra 1500. While traveling on a two-lane highway at approximately 55 MPH, another vehicle suddenly turned into the contact's lane, resulting in a severe frontal "T-bone" collision. The force of the impact caused the other vehicle to be propelled into a ditch, while the contact's vehicle remained on the roadway. Despite the significant nature of the crash and the speed involved, no air bags deployed. The dealer was notified of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 218,000.

    NHTSA complaint 11728045
16. Filed Mar 23, 2026Failure Mar 22, 2026howard, WIBody

    Bad paint used by manufacturers that causes frames to rust out.

    NHTSA complaint 11726320
17. Filed Mar 23, 2026Failure Mar 23, 2026howard, WIBody, Suspension

    Truck started to make loud clunking noise when driving taken it to two shops and wrong parts were installed as stated below. Bought from a used car dealership and they sold it as is now with the wrong parts.

    NHTSA complaint 11726316
18. Filed Mar 17, 2026Failure Mar 13, 2026124,000 milesApopka, FLEngineFire

    The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at approximately 45 mph, he observed a popping noise beneath him. The contact stopped the vehicle and observed smoke emanating from the front of the vehicle. The vehicle went into limp mode, lost power, and when the brake was depressed, the vehicle did not slow the vehicle down as intended. The contact stated that as he pulled into a parking lot to inspect the vehicle, he observed flames emanating from the hood. The contact stated that he pressed the hood latch, which did not open the hood, and he then exited the vehicle and observed the hood engulfed in flames. The contact mentioned that a store employee brought a fire extinguisher out and attempted to extinguish the flames. The fire department was called and extinguished the fire fully. There was no police report, but the police did come out to assist. The contact sustained a right-hand injury, but medical attention was not needed. The vehicle was then towed to the residence. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 124,000.

    NHTSA complaint 11724912
19. Filed Mar 8, 2026Failure Mar 4, 2026Post Falls, IDEngine

    Another GM truck AFM failing. It failed at 70,000 miles causing P0307 cylinder 7 misfire. No aggressive driving just commuting to work. Truck just got done with a new oil change. It's another to add to the hundreds/thousands seen on Reddit threads of all 5.3/6.2 AFM/DFM that this organization turns a blind eye to.

    NHTSA complaint 11722758
20. Filed Mar 2, 2026Failure Nov 30, 2023Carlsbad, NMService brakes, Unknown or other

    I had and still have the Brake Assist failure warning light on and having issues with brake pedal effort not working as it should to stop vehicle and also the stability control warning lights., the brakes hardly work at all at low speeds and most of the time don't stop the vehicle almost causing several crashes. I took vehicle to gm service center and they said they updated software but when I picked up the vehicle and drove it not long after the brake assist warning came back on and I still had no brakes at slower speeds and the problem had actually gotten worse than it was before i took it to them. I called the dealership and told them that the problem had not been fixed and it was worse they said that I would have to pay the service fee / price for parts if I wanted to bring the vehicle back in and to have problem fixed...I explained it was a re call and it was taken to them to have issue fixed in the first place ...and I was told I would have to pay since they updated software ..I then explained it was worse than when I took it to them and still got denied any kind of resolution to the problem. Nothing was fixed or solved. I still had the warning lights on dash and the problem was worse then when I took the vehicle to them for repair. Not long after the transmission went out and the vehicle hadn't been drove. So it sat for 2 yrs or so. I just got a new one put in and the vehicle still has the same problems with the brake system . I reached out to dealership once again and was told I would still have to pay to have the issues fixed when it was never taken care of by them to begin with.

    NHTSA complaint 11721467