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Home >> Chevrolet >> 2007 >> HHR LS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls & Fuel - 2.2L - Introduction (2 Of 2) >> Repair Instructions >> Engine Control Module Replacement >> Removal Procedure
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Removal Procedure

    Fig 1: ECM/TCM Cover
    GM1631889Courtesy 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. Remove the ECM/TCM cover.
    4. Fig 2: View Of Body Wiring Harness Electrical Connector
    GM1833664Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the body harness electrical connector (1) from the ECM.
    5. Fig 3: View Of Engine Wiring Harness Electrical Connector
    GM1833663Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the engine harness electrical connector (1) from the ECM.
    6. Fig 4: View of ECM Retaining Tab
    GM1833662Courtesy of GENERAL MOTORS CORP.
    NOTE: Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables or when charging the vehicles battery.
  6. Release the retaining tab (1) in order to release the ECM from the underhood junction block bracket.
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