A recall for 11,787 2025-2026 Chevrolet Silverado 3500 and GMC Sierra 3500 pickups over issues with rear fuel pump.
GM is recalling 11.787 2025-2026 Chevrolet Silverado 3500 and GMC Sierra 3500 pickups with gasoline engines and dual fuel tanks. The rear fuel pump may not transfer enough fuel to the front tank, causing an engine stall. An engine stall can increase the risk of a crash.
The vehicle’s engine control module (ECM) will be updated by a dealer or through an over-the-air (OTA) update, free of charge. Owner notification letters are expected to be mailed April 20, 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 became searchable on NHTSA.gov on March 5, 2026.
Here is the relevant information from the NHTSA Recall notice:
NHTSA ID Number:Â 26V129
Manufacturer: General Motors, LLC
Components:Â Software
Potential Number of Units Affected:Â 11,787
Estimated percentage with defect: 1%
Descriptive Information:
Manufacturing records were used to determine the recall population.
This recall involves HD models with gasoline engines and dual fuel tanks (RPOs L8T and N2N). Other models and HD trucks with diesel engines are not included.
Up to 6,543 2025 Chevrolet Silverado 3500 are affected, along with 3,282 2026 models. Up to 1,135 2025 GMC Sierra 3500 are affected, along 827 2026 models.
Description of defect or noncompliance:
General Motors has decided that a defect which relates to motor vehicle safety may exist in certain 2025 – 2026 model year Chevrolet Silverado 3500 and GMC Sierra 3500 vehicles with gasoline engines and dual fuel tanks (RPOs L8T and N2N). 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.
Description of the cause:
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.
Description of remedy program:
General Motors will update the software in the vehicle’s engine control module (ECM). 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.
Description of recall schedule:
Dealers will be notified on March 5, 2026. Owner notification of an available remedy is estimated to start mailing on April 20, 2026.
For more information, and to see if your vehicle is affected, visit NHTSA.gov.
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