GM Issues Fix (and small warranty extension) for Defective 2023 Chevy Silverado Electronic Parking Brake

A GM customer satisfaction program covers the 2023 Chevy Silverado 1500 and includes information on a remedy that is currently available for some trucks whose Electronic Parking Brake may not release automatically due to a configuration error.

The vehicle will additionally show the notice "Service 4WD" in affected Chevy Silverado pickups in the event that the Electronic Parking Brake does not release automatically. Reprogramming the Transfer Case Control Module with a correct calibration supplied by GM will, hopefully, repair the issue. The Electronic Parking Brake should then function as normal and service messages no longer display.

The patch is included under GM customer satisfaction program number N232425900.

The repair is available free of charge during the period of the customer satisfaction program, which continues through November 30th, 2025. No parts are needed for the fix and no physical components need to be replaced.