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Home >> Cadillac >> 2021 >> XT5 Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 333 (Programming And Setup) >> Repair Instructions >> K71 Transmission Control Module or Q8 Control Solenoid Valve Assembly: Programming and Setup (6L90 (MYD)) >> TCM Reprogramming
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TCM Reprogramming

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.
  1. If the TCM needs to be reprogrammed, refer to Service Programming System (SPS) .
  2. Perform the Reset Transmission Adapts - Refer to Reset Transmission Adapts .
    3. NOTE:

    After programming, perform the following to avoid future misdiagnosis:

  3. Turn the ignition OFF for 30 seconds.
  4. Turn the ignition ON with the engine OFF.
  5. Use the scan tool in order to retrieve history DTCs from all modules.
  6. Clear all history DTCs.
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