TCM Reprogramming
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.
- If the TCM needs to be reprogrammed, refer to Service Programming System (SPS) .
- Perform the Reset Transmission Adapts - Refer to Reset Transmission Adapts .
- Turn the ignition OFF for 30 seconds.
- Turn the ignition ON with the engine OFF.
- Use the scan tool in order to retrieve history DTCs from all modules.
- Clear all history DTCs.
NOTE:
After programming, perform the following to avoid future misdiagnosis: