General Motors, (NYSE: GM) is recalling ~12,000 model year 2025-2026 Chevrolet Silverado 3500, and GMC Sierra 3500 pickups with gasoline engines and dual fuel tanks (RPOs L8T and N2N). The rear fuel pump may not transfer adequate fuel to the front tank, causing an engine stall.
“In these vehicles, the driver may not be warned if the rear fuel pump does not transfer adequate fuel to the front tank, which can cause a stall,” GM told the National Highway Traffic Safety Administration (NHTSA), which publicly released the required safety defect recall documents this morning.
“An incorrect engine control module (ECM) software calibration may erroneously set certain diagnostic trouble codes (DTCs) during a normal fuel transfer from the secondary tank to the primary tank that will disable further fuel transfers until the next key cycle. If these DTCs set, the fuel gauge will still read the combined fuel volume, even though fuel in the secondary tank is not available to the engine during the current key cycle,” GM said.
The vehicle’s engine control module (ECM) will be updated free of charge as required by U.S. safety regulations. Corrected ECM calibrations will not erroneously set DTC codes that disable fuel transfer between tanks. Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may have the updates performed at a GM dealer.
Owner notification letters are not expected to be mailed until 20 April 2026. Owners may contact GMC customer service at 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM’s number for this recall is N262544420. Vehicle Identification Numbers (VINs) involved in this recall are searchable on NHTSA.gov.
Chronology
- On 29 October 2025, a GM systems engineer identified a high occurrence of three diagnostic trouble codes (DTCs) setting on 2025 and 2026 model year Silverado and Sierra 3500 series trucks equipped with dual fuel tanks. It was subsequently determined that these codes were often being set in error and could result in a misleading fuel gauge reading, potentially leading to a vehicle stall.
- On 12 January 2026, the issue was reported to GM’s Speak Up For Safety (SUFS) program. GM’s investigation determined that these DTCs could erroneously be set following a normal fuel transfer between the secondary and primary fuel tanks. Once set, further fuel transfers are disabled until the next key cycle. The fuel gauge will briefly show the correct amount of available fuel. However, after five seconds, the fuel gauge reverts to reflect the amount of fuel in both tanks, even though fuel in the secondary tank is not available during the current key cycle.
- On 20 January 2026, an analysis of field data found 20 potentially related complaints of vehicles stalling while driving. GM received these reports between 4 February 2025 and 6 January 2026.
- On 26 February 2026, GM’s Safety and Field Decision Authority decided to conduct a safety recall. GM is not aware of any crashes or injuries associated with this condition.
About Ken Zino
Ken Zino, editor and publisher of AutoInformed, is a versatile auto industry participant with global experience spanning decades in print and broadcast journalism, as well as social media. He has automobile testing, marketing, public relations and communications experience. He is past president of The International Motor Press Assn, the Detroit Press Club, founding member and first President of the Automotive Press Assn. He is a member of APA, IMPA and the Midwest Automotive Press Assn.
He also brings an historical perspective while citing their contemporary relevance of the work of legendary auto writers such as Ken Purdy, Jim Dunne or Jerry Flint, or writers such as Red Smith, Mark Twain, Thomas Jefferson – all to bring perspective to a chaotic automotive universe.
Above all, decades after he first drove a car, Zino still revels in the sound of the exhaust as the throttle is blipped during a downshift and the driver’s rush that occurs when the entry, apex and exit points of a turn are smoothly and swiftly crossed. It’s the beginning of a perfect lap.
AutoInformed has an editorial philosophy that loves transportation machines of all kinds while promoting critical thinking about the future use of cars and trucks.
Zino builds AutoInformed from his background in automotive journalism starting at Hearst Publishing in New York City on Motor and MotorTech Magazines and car testing where he reviewed hundreds of vehicles in his decade-long stint as the Detroit Bureau Chief of Road & Track magazine. Zino has also worked in Europe, and Asia – now the largest automotive market in the world with China at its center.
Silverado and GMC HD Pickups Recalled for Sudden Stalling
General Motors, (NYSE: GM) is recalling ~12,000 model year 2025-2026 Chevrolet Silverado 3500, and GMC Sierra 3500 pickups with gasoline engines and dual fuel tanks (RPOs L8T and N2N). The rear fuel pump may not transfer adequate fuel to the front tank, causing an engine stall.
“In these vehicles, the driver may not be warned if the rear fuel pump does not transfer adequate fuel to the front tank, which can cause a stall,” GM told the National Highway Traffic Safety Administration (NHTSA), which publicly released the required safety defect recall documents this morning.
“An incorrect engine control module (ECM) software calibration may erroneously set certain diagnostic trouble codes (DTCs) during a normal fuel transfer from the secondary tank to the primary tank that will disable further fuel transfers until the next key cycle. If these DTCs set, the fuel gauge will still read the combined fuel volume, even though fuel in the secondary tank is not available to the engine during the current key cycle,” GM said.
The vehicle’s engine control module (ECM) will be updated free of charge as required by U.S. safety regulations. Corrected ECM calibrations will not erroneously set DTC codes that disable fuel transfer between tanks. Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may have the updates performed at a GM dealer.
Owner notification letters are not expected to be mailed until 20 April 2026. Owners may contact GMC customer service at 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM’s number for this recall is N262544420. Vehicle Identification Numbers (VINs) involved in this recall are searchable on NHTSA.gov.
Chronology
About Ken Zino
Ken Zino, editor and publisher of AutoInformed, is a versatile auto industry participant with global experience spanning decades in print and broadcast journalism, as well as social media. He has automobile testing, marketing, public relations and communications experience. He is past president of The International Motor Press Assn, the Detroit Press Club, founding member and first President of the Automotive Press Assn. He is a member of APA, IMPA and the Midwest Automotive Press Assn. He also brings an historical perspective while citing their contemporary relevance of the work of legendary auto writers such as Ken Purdy, Jim Dunne or Jerry Flint, or writers such as Red Smith, Mark Twain, Thomas Jefferson – all to bring perspective to a chaotic automotive universe. Above all, decades after he first drove a car, Zino still revels in the sound of the exhaust as the throttle is blipped during a downshift and the driver’s rush that occurs when the entry, apex and exit points of a turn are smoothly and swiftly crossed. It’s the beginning of a perfect lap. AutoInformed has an editorial philosophy that loves transportation machines of all kinds while promoting critical thinking about the future use of cars and trucks. Zino builds AutoInformed from his background in automotive journalism starting at Hearst Publishing in New York City on Motor and MotorTech Magazines and car testing where he reviewed hundreds of vehicles in his decade-long stint as the Detroit Bureau Chief of Road & Track magazine. Zino has also worked in Europe, and Asia – now the largest automotive market in the world with China at its center.