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Home >> Pontiac >> 2009 >> G6 GT, 2D Convertible, 3.9 1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 3.9L - Introduction >> Repair Instructions >> Engine Control Module Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: Removing/Installing ECM
    GM1578456Courtesy of GENERAL MOTORS CORP.
  1. Slide the ECM into the ECM bracket on the front of the battery box.
  2. Push down on the ECM until the retaining tab snaps into place.
    3. Fig 2: View Of Engine Harness ECM/PCM Connectors
    GM1583655Courtesy of GENERAL MOTORS CORP.
  3. Connect the engine harness electrical connectors (1) to the ECM.
  4. Slide the lever locks downward to secure the connectors.
    5. Fig 3: View Of Body Harness ECM/PCM Connectors
    GM1583653Courtesy of GENERAL MOTORS CORP.
  5. Connect the body harness electrical connectors to the ECM.
  6. Slide the lever lock downward to secure the connector.
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  8. If a NEW ECM was installed, the ECM must be programmed. Refer to Control Module References .
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