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Home >> Hummer >> 2009 >> H3 Alpha >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 5.3L - Introduction >> Repair Instructions >> Engine Control Module Replacement >> Removal Procedure
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Removal Procedure

    Fig 1: Body Wiring Harness Electrical Connector
    GM1897080Courtesy of GENERAL MOTORS CORP.
  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
  2. Remove the windshield washer solvent container. Refer to Windshield Washer Solvent Container Replacement .
  3. Disengage the integral connector position assurance (CPA) retainer (1) on the body wiring harness electrical connector.
  4. Disconnect the body wiring harness electrical connector (2) from the ECM.
    5. Fig 2: Integral CPA Retainers
    GM1897083Courtesy of GENERAL MOTORS CORP.
  5. Disengage the integral CPA retainers on the engine wiring harness electrical connectors.
  6. Disconnect the engine wiring harness electrical connectors (2) from the ECM.
    7. Fig 3: ECM Bracket Tabs
    GM1897085Courtesy of GENERAL MOTORS CORP.
  7. Lift up the ECM bracket tabs (2) and tilt the ECM (1) towards the front of the vehicle, removing the ECM (1).
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