Circuit/System Verification
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 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 Front Fog Lamp Switch parameter while activating the fog lamp switch. The reading should change between Active and Inactive.
- If the reading does not change between the commanded states, refer to Fog Lamp Switch Malfunction .