Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. 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 pressing and releasing the front fog lamp switch. The reading should change between Active and Inactive.
- If not the specified value, refer to the Front Fog Lamp Switch Malfunction .
- Ignition ON, command the Fog Lamps ON and OFF with a scan tool. Verify the front fog lamps turn ON and OFF.
- If the front fog lamps do not turn ON and OFF, refer to the Front Fog Lamp Malfunction .