Circuit/System Verification
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, observe the scan tool Door Lock Actuator Cmd parameter while operating the affected front door lock switch between lock and unlock. The reading should change from Off to Lock and Unlock.
- If the reading does not change relative to the actual switch position, replace the affected door lock and side window switch.