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Removal Procedure

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    Fig 1: Identifying ECM Engine Harness Electrical Connectors
    GM1592534Courtesy of GENERAL MOTORS CORP.
  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
  2. Record the preset radio stations.
  3. Turn the ignition OFF.
  4. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  5. Disconnect the engine harness electrical connectors (2) from engine control module (ECM).
    6. Fig 2: View Of ECM
    GM1593843Courtesy of GENERAL MOTORS CORP.
  6. Release the upper retaining tab using a small screwdriver or other suitable tool.
  7. Remove the ECM by lifting upward after releasing the tab.
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