Circuit/System Verification

WARNING: This page is about a different car, the 2011 GMC Acadia, 2011 Chevrolet Traverse, and 2011 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON, verify with a scan tool the park brake switch parameter displays RELEASED.
- If not the specified value, refer to Symptoms - Park Brake .
Command the DRLs ON and OFF with a scan tool. The daytime running lights should turn ON and OFF when changing between the commanded states.
- If the daytime running lights do not turn ON and OFF when changing between the commanded states, refer to Circuit/System Testing.