Circuit/System Testing

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Re-calibrate the TCM. Refer to Control Module References for TCM replacement, setup, and programming.
Ignition on, verify that DTC P0602 does not set.
- If DTC resets, replace the TCM. Refer to Control Module References for TCM replacement, setup, and programming.
Perform fast learn procedure. Refer to FastLearn Procedure .