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.

Verify that DTC P0572 or P0573 is not set.
- If DTC is set, refer to Diagnostic System Check - Vehicle (with HP2) , Diagnostic System Check - Vehicle (without HP2) .
Verify that DTC P0703 is not set.
- If DTC is set, replace the BCM. Clear the DTC and road test the vehicle. If DTC resets, replace the ECM/PCM.