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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - Repair Instructions >> Repair Instructions >> Engine Control Module Replacement >> Removal Procedure
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Removal Procedure

    Fig 1: View Of ECM Components
    GM1703437Courtesy of GENERAL MOTORS COMPANY
  1. Record the current Engine Oil Life percentage, and use a scan tool to update the NEW ECM, if replacing.
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  3. Disengage the engine wiring harness upper electrical connector retainer (2) and remove the connector (1) from the ECM.
  4. Disengage the engine wiring harness lower electrical connector retainer (3) and remove the connector (4) from the ECM.
    5. Fig 2: View Of ECM & Bracket
    GM1703439Courtesy of GENERAL MOTORS COMPANY
  5. Disengage the retainer tabs securing the ECM to the bracket.
  6. Remove the ECM.
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