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Home >> Isuzu >> 2007 >> Ascender RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 274 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Repair Instructions - On Vehicle >> Transmission Control Module Replacement (LH6) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Isuzu Ascender, 2008 GMC Envoy, and 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Disconnect the cooling fan electrical connector for additional clearance while removing the TCM.
    3. Fig 1: Identifying ECM/TCM cover, bracket & Retainers
    GM1521469Courtesy of GENERAL MOTORS CORP.
  3. Depress the engine control module (ECM)/TCM cover retainers (2).
  4. Remove the ECM/TCM cover from the ECM/TCM bracket (1).
    5. Fig 2: Identifying ECM/TCM Connectors & Bracket
    GM1521481Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Handling Electrostatic Discharge Sensitive Parts Notice .
    IMPORTANT: It is not necessary to disconnect the TCM electrical connectors in order to remove the TCM from the ECM/TCM bracket. Only disconnect the electrical connectors if servicing of component requires disconnecting of the electrical connectors.
    IMPORTANT: Remove any debris from around the TCM connector surfaces before servicing the TCM. Inspect the TCM module connector gaskets when diagnosing or replacing the TCM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the TCM.
  5. Disconnect the TCM electrical connector (1) from the TCM (2)
    6. Fig 3: View Of ECM/TCM Retainer, Bracket & Retaining Tab
    GM1521482Courtesy of GENERAL MOTORS CORP.
  6. Release the bracket TCM retainer (1).
  7. Tilt the TCM (2) away from the ECM/TCM bracket.
    8. Fig 4: ECM/TCM Bracket
    GM1521496Courtesy of GENERAL MOTORS CORP.
  8. Remove the TCM (1) from the TCM bracket (2).
    9. Fig 5: View Of Engine Control Module (ECM) Bracket
    GM1521468Courtesy of GENERAL MOTORS CORP.
  9. Only when replacement of the ECM/TCM bracket (2) is necessary, remove the ECM (3). Refer to Engine Control Module Replacement .
    10. Fig 6: ECM/TCM Bracket Retaining Bolts
    GM1521466Courtesy of GENERAL MOTORS CORP.
  10. Remove the ECM/TCM bracket retaining bolts (2).
  11. Remove the ECM/TCM bracket (1) from the vehicle frame.
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