Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. 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, P0481, or P0482 (with HP2) .
- Ignition ON, command the cooling fans ON and OFF at high, medium, and low speed with a scan tool. Verify that both fans turn ON and OFF when changing between the commanded states.