Repair Procedures
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Control solenoid (w/body and TCM) valve assembly. Refer to Control Module References for replacement, setup, or programming.
- Low and reverse clutch assembly replacement. Refer to Low and Reverse Clutch Overhaul (6L80) or Low and Reverse Clutch Overhaul (6L90) .
- Lower valve body assembly. Refer to Control Valve Lower Body and Upper Body Replacement
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- Perform the valve body inspection procedure, refer to Control Valve Upper Body Assembly Cleaning and Inspection . If the inspection procedure indicates to replace the valve body, refer to Control Valve Lower Body and Upper Body Replacement .
- Perform the Service Fast Learn Adapts .