Circuit/System Verification
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
With the ignition ON, use a scan tool to display DTCs for the BCM.
- If B codes are present, Refer to Diagnostic System Check - Vehicle .
- If no DTCs are present, go to Diagnostic Aids.