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Reprogram Control Module

WARNING: This page is about a different car, the 2022 Buick Envision. However, it is still accessible from the selected car via links, so may be relevant.

To program an existing K71 Transmission Control Module, perform the following procedure.

  1. Install EL-49642  SPS programming support tool.
  2. Access the Service Programming System (SPS) and follow the on-screen instructions.
  3. Perform one of the following SPS Programming functions:
    4. NOTE:

    If both controller options below are listed, select K71 Transmission Control Module

    • K20/ K71 Engine and Transmission Control Modules and follow the on-screen instructions
    • K71 Transmission Control Module and follow on-screen instructions.
  5. Perform the Refresh Characterization Data at the MCVM Characterization procedure, follow the on-screen instructions.
  6. Perform the Vehicle Setup, follow the on screen instructions.
  7. With a scan tool, clear DTCs from the K71 Transmission Control Module.
  8. Ignition OFF for 2 minutes.
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