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Home >> Chevrolet >> 2020 >> Express 2500 Base, Van Cargo, 2.8L Eng VIN 1 >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Programming And Setup) >> Repair Instructions >> Control Solenoid Valve and Transmission Control Module Assembly Programming and Setup (6L90) >> TCM Reprogramming
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TCM Reprogramming

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. 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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