Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Key ON, engine ON. Let engine run for at least 1 minute.
- Key OFF for at least 30 seconds to allow for the complete shutdown of the TCCM.
- Key ON, engine OFF.
- Verify that DTC C0387 is not set.
- If DTC C0387 is set, diagnose it first.
- Verify that DTC C0569 is not set.
- If DTC C0569 is set, perform the ATC motor learn procedure. Refer to Transfer Case High/Low Clutch Reset .