Diagnostic Starting Point - Body Control System
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Begin the diagnosis of the body control system by performing the diagnostic system check for the system in which the customer concern is apparent.
The diagnostic system check will direct you to the correct procedure for diagnosing the system and where the procedure is located.