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Removal Procedure

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    Fig 1: View Of Body Harness ECM/PCM Connectors
    GM1583653Courtesy of GENERAL MOTORS CORP.

  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.

  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  3. Slide the lever lock to the up position in order to release the connector.
  4. Disconnect the body harness electrical connector from the engine control module (ECM).
    5. Fig 2: View Of Engine Harness ECM/PCM Connectors
    GM1583655Courtesy of GENERAL MOTORS CORP.
  5. Slide the lever locks to the up position in order to release the connectors.
  6. Disconnect the engine harness electrical connectors (1) from the ECM.
    7. Fig 3: Removing/Installing ECM
    GM1578456Courtesy of GENERAL MOTORS CORP.
  7. Release the retaining tab located in the battery box lower half using a small screwdriver or other suitable tool.
  8. Remove the ECM by lifting upward after releasing the tab.
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