Chevrolet Low Cab Forward 3500 2018–2023 — technical service bulletin
Bulletin N232429740 · NHTSA communication 11014440 · issued Feb 24, 2025
Technical service bulletin
communication type
Engine
component
2018–2023
model years
7
vehicle entries
Official summary
Emission Recall. On certain vehicles with specific Malfunction Indicator Light (MIL) -on faults, the miles travelled calculation switches from the Transmission Output Speed Sensor (TOSS) to the Wheel Speed Sensor (WSS) and the mileage recorded by the On Board Diagnostic (OBD) System is accumulated at one-fourth actual due to an incorrectly calibrated parameter used in the calculation. Dealers will reprogram the engine control module.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.