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Home › Chevrolet › 2004 › Optra Base, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls - 1.8L (L79) - Repair Instructions › Repair Instructions › Engine Control Module Replacement › Removal Procedure

Removal Procedure

    Fig 1: Identifying ECM
    GM1289499Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Battery Disconnect Caution .
  1. Disconnect the negative battery cable.
  2. Remove the air intake tube and resonator.
  3. Disconnect the engine control module (ECM) connectors from the ECM.
  4. Remove the ECM.
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