Circuit/System Verification
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, observe the DTC information with a scan tool. Verify that DTC P0480 or P0481 is not set.
- If a DTC is set, refer to DTC P0480 or P0481 (without HP2) .
- Ignition ON, command high and low speed fans ON and OFF with a scan tool. Verify that both fans turn ON and OFF when changing between the commanded states.