General Motors has officially issued a safety recall for 11,787 heavy-duty trucks, specifically targeting the 2025-2026 Chevrolet Silverado 3500 and the 2025-2026 GMC Sierra 3500. This recall addresses a potentially dangerous software defect that could lead to an unexpected engine stall, something that could the risk of a crash on the road.
Why the 2025-2026 Chevrolet Silverado 3500 is Being Recalled
The issue sits within the truck’s Engine Control Module software calibration. The recall exclusively affects heavy-duty Silverado 3500 and Sierra 3500 models with gasoline engines and dual fuel tanks, which are designated by the production codes RPO L8T and N2N.
Silverado models include 6,543 units from the 2025 model year and 3,282 units from the 2026 model year. If you drive a diesel variant or a different HD model, you can breath again – your truck is not included in this safety recall.
During a standard fuel transfer from the truck’s secondary tank to the primary tank, an incorrect ECM calibration can trigger diagnostic trouble codes. Once these codes are set, the system shuts down any further fuel transfers between the dual tanks until the vehicle is turned off and restarted for the next key cycle.
The real danger to drivers arises because the dashboard fuel gauge will continue to read the combined fuel volume of both tanks. As a result, you might believe you have plenty of fuel left, even though the fuel trapped in the secondary tank is completely unavailable to the engine during your current drive.
If the primary tank runs dry, the rear fuel pump cannot pump enough fuel, directly causing the engine to stall. GM first identified this issue in late 2025 and eventually found 20 potentially related complaints of vehicles stalling while driving.
How General Motors is Fixing the Fuel Transfer Defect
To fix this stall risk, General Motors will update the ECM software on all affected vehicles entirely free of charge. And fortunately, the fix can be undertaken thanks to an over the air update, meaning a traditional trip to the dealership may not be on the cards. Alternatively, owners can still opt to have the software updated in person at their local GM dealer if you fancy it.
Owner notification letters are expected to be mailed starting April 20, 2026.
But in the meantime, you can check your VIN on the NHTSA recall portal.
