Unsuccessful Programming Recovery

WARNING: This page is about a different car, the 2021 GMC Sierra 3500 HD and 2021 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

If programming a control module is not successful, perform the following procedure:

Verify the control module, data link connector and programming tool connections are secure and the tool software is up to date.
Ignition - On / Vehicle - In Service Mode
Perform the SPS function: K69 Transfer Case Control Module - Programming
Verify the control module programming is successful.
- If the programming is not successful
1. Ignition/Vehicle - Off - For greater than 1 min
2. Ignition - On / Vehicle - In Service Mode
3. Perform the SPS function: K69 Transfer Case Control Module - Programming
  - If the programming is not successful - Replace the component: K69 Transfer Case Control Module
  1. Replace the component: K69 Transfer Case Control Module
  2. Perform the SPS function: K69 Transfer Case Control Module - Setup
  - Go to next step: If the programming is successful
4. Perform the SPS function: K69 Transfer Case Control Module - Setup
  - If the procedure was not successful
  1. Replace the component: A16 Transfer Case Motor
  2. Perform the SPS function: K69 Transfer Case Control Module - Setup
  - Go to next step: If the procedure was successful
5. Perform the scan tool function: Range Actuator Learn
  Refer to: Transfer Case Range Actuator Learn
6. All OK.
- Go to next step: If the programming is successful
Perform the SPS function: K69 Transfer Case Control Module - Setup
Clear DTCs.
Perform the scan tool function: Range Actuator Learn
Refer to: Transfer Case Range Actuator Learn
All OK.