Circuit/System Verification

WARNING: This page is about a different car, 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.

Verify that DTC P0602 is not set.

If DTC P0602 is set, program the TCM.

If DTC P0602 is not set, replace the TCM