General Motors, LLC recall 26V129

Affected vehicles (2)

Component / system

Defect

General Motors, LLC (GM) is recalling certain 2025-2026 Chevrolet Silverado 3500, and GMC Sierra 3500 vehicles 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.

Risk / consequence

An engine stall increases the risk of a crash.

Remedy

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 were mailed April 8, 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.

Chronology of events

1. Oct 29, 2025

   On October 29, 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. The issue was reported to GM’s Speak Up For Safety (SUFS) program on January 12, 2026. 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. An analysis of field data completed on

2. Jan 20, 2026

   January 20, 2026, found 20 potentially related complaints of vehicles stalling while driving. GM received

Notification schedule

Dealer notification

Mar 05, 2026 - Mar 05, 2026 No Dealers

Owner notification

Apr 20, 2026 - Apr 20, 2026 Phased Recall