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