Reprogram Control Module
WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
To reprogram an existing K20 Engine Control Module, perform the following procedure:
- Access the Service Programming System (SPS) and follow the on-screen instructions.
- Perform one of the following SPS Programming functions:
- K20/K71 Engine and Transmission Control Modules and follow the on-screen instructions.
- K20 Engine Control Module and follow on-screen instructions.
NOTE:If both controller options below are listed, select K20/K71 Engine and Transmission Control Modules.
- Clear DTCs after completing the Programming procedure.
- If equipped, perform the Fuel Pressure Regulator Learn via GDS2, Engine Control Module, Configuration/Reset Functions, Learn Functions.
- Clear DTCs.