GMC Sierra 2500 stalling problems

Filed Oct 13, 2026 · Electrical · 177,000 miles · PA

The contact works for a company that owns a 2023 GMC Sierra 2500. The contact stated that the vehicle experienced intermittent electrical failures. While driving, the vehicle stalled upon acceleration, followed by a total loss of electrical power. The vehicle was towed to a dealer for inspection; however, the failure could not be duplicated. The failure mileage was 177,000.

Filed Sep 24, 2026 · Electrical, Engine · CA

The vehicle experienced a loss of engine power accompanied by a check engine warning light and a “Reduced Acceleration”/reduced-power condition. The exact component causing the malfunction has not yet been determined. The vehicle and any affected components are available for inspection upon request. While driving the truck uphill toward our residence, the vehicle lost significant power and had difficulty maintaining acceleration. The truck stalled several times. The sudden loss of engine power while driving on an incline created a safety risk because the vehicle was unable to maintain normal acceleration and could potentially have stopped in traffic or created a hazard for other vehicles. The problem has not yet been confirmed or reproduced by a dealer or independent service center. The vehicle has experienced the problem while being driven, including the reduced-acceleration condition and multiple stalls. The vehicle will be inspected by a GMC dealer on Monday, September 28, 2026. The check-engine warning light illuminated, and the vehicle displayed a reduced-acceleration/reduced-power condition. The truck subsequently experienced significant loss of power while traveling uphill and stalled several times. These symptoms first appeared on September 14, 15, 22, and 23, 2026.

Filed Sep 23, 2026 · Fuel system · 54,238 miles · FL

The contact owns 2024 GMC Sierra 2500. The contact stated that while driving 25 MPH and depressing the accelerator pedal, the vehicle decelerated and stopped independently. A dealer was contacted. The vehicle was taken to the dealer and was diagnosed with fuel pump driver control module failure. The contact was informed that the fuel pump driver control module needed to be replaced. The contact associated the failure with Technical Service Bulletin: 24-NA-139 (Fuel Pump Driver Control Module stalling or no-start conditions); however, the VIN was not included in the TSB. The manufacturer was notified of the failure, and informed the contact that the vehicle was under warranty. The failure mileage was 54,238.

Filed May 15, 2026 · Engine, Fuel system · TX

I recently purchased my vehicle from Big Star Dealership in Baytown Tx. At a little over 1000 miles i was towing a camper. The vehicle stalled, fuel pouring from engine. It was towed and repaired due to fuel pump failure. At a little over 3000 miles the vehicle would not start. Dealership initially said water contamination then changed it and said gasoline contamination and now they say DEF contamination. The vehicle stalling the first time almost caused me to wreck the vehicle

Filed Apr 1, 2026 · Engine · 77,000 miles · IN

The contact owns a 2021 GMC Sierra 2500. The contact stated that while driving at 55 MPH, the vehicle stalled unexpectedly. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed, and determined that the engine needed to be replaced. The engine was replaced; however, the failure recurred. While at a stop and attempting to drive around a curve, the vehicle stalled. No warning lights were illuminated. The vehicle was taken to the local dealer, where it was diagnosed with engine failure. The vehicle was not repaired. The failure mileage was approximately 77,000. The VIN was not available.

Filed Jul 19, 2025 · Body, Electrical · KY · fire

I was driving my 2022 GMC 2500 HD (not towing, just normal drive) after an oil change <900 miles ago and new brakes/rotors 3 days prior <100 miles (total mileage 81,000, serviced exclusively at GMC dealership) when the loss of power alert flashed on the screen. I was 2 miles from my destination, going approx 55mph, so I kept driving to destination, when the vehicle stalled in driveway. As I was scrolling through menus to see the alert I looked up and smoke and flames were coming out of the engine. I attempted to extinguish with a fire extinguisher I had with me, but it was no use. The entire engine was engulfed, melting out, tires and windshield exploded from heat etc. Total loss. Vehicle was inspected by insurance co fire investigator, no origin confirmed due to extent of damage. Vehicle was offered to GMC for their inspection as it was partially under OEM warranty and I had an extended warranty from dealership, which I also notified. Extended would not do anything without the vehicle at GMC and diagnosis, which again, there is no engine etc so not repairable. GMC was to be in contact with insurance co. No status update received.

Filed Jul 10, 2025 · Fuel system · 129,000 miles · CA

The contact owns a 2015 GMC Sierra 2500. The contact stated while driving at an undisclosed speed, the vehicle lost automotive power and stalled. No warning lights was illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that the Fuel Pump Module needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 129,000.

Filed Jun 19, 2025 · Fuel system · CO

The CP4 pump failed while driving causing vehicle to stall. Upon failure, lost power to steering. Luckily we were on an access road for a rest area and not yet on the interstate. This resulted in a 14.5 thousand repair. No prior warning to pump failure. GM has recently settled a class action related to this pumps failure and has never recalled trucks with this pump to avoid failure.

Filed Jan 3, 2025 · Fuel system · 206,000 miles · SC

The contact owns a 2013 GMC Sierra 2500. The contact stated while driving 60 MPH, the vehicle stalled. There was no warning light illuminated. The contact was able to coast to the side of the road, where a mobile independent mechanic diagnosed that the fuel pump had failed. The mechanic determined that the entire fuel system assembly needed to be replaced. The vehicle was not repaired. The vehicle was then towed to an unknown dealer but was not diagnosed or repaired. The vehicle was currently being towed to the residence. The manufacturer was notified of the failure and informed the contact that the repair could not be covered because the VIN was not included in a related recall and the vehicle was not covered under warranty. The failure mileage was approximately 206,000.

Filed Dec 19, 2024 · Engine, Transmission · 134,000 miles · FL

The contact owns a 2021 GMC Sierra 2500. The contact stated while driving 40-55 MPH, the vehicle started losing motive power. The contact stated while pulling into a nearby independent mechanic shop, the vehicle started jerking significantly and stalled midway. The check engine warning light was illuminated. The mechanic diagnosed the vehicle with transmission failure. The vehicle was towed to the residence. The local dealer and several unknown dealers were notified of the failure and informed the contact that the transmission assembly was not available and could not be ordered. The vehicle was towed to CJ's Transmission, where the transmission was taken apart. The mechanic determined that the transmission needed to be replaced. The vehicle was being repaired with a rebuilt transmission. The contact received notification of the federal safety agency Campaign Number: 24V797000 (Power Train); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure and offered a modest monetary compensation for the repair. The failure mileage was approximately 134,000. Parts distribution disconnect.