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Home >> GMC >> 2005 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls - 6.6L (Introduction)) >> Repair Instructions >> Engine Control Module (ECM) Replacement >> Installation Procedure

Installation Procedure

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    Fig 1: ECM Cover Retaining Tabs
    GM1334382Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The cover must be fully installed prior to the electrical connections being made to ensure the ECM is fully seated in the bracket.
  1. Install the ECM.
  2. Install the ECM cover to the bracket.
  3. Engage the ECM cover retaining tabs.
  4. Fig 2: View Of ECM Electrical Connectors
    GM1334384Courtesy of GENERAL MOTORS CORP.
  5. Connect the ECM electrical connectors (2).
  6. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical.
  7. If a NEW ECM was installed, program the ECM. Refer to Control Module References in Computer/Integrating Systems.
  8. Perform the turbocharger learn procedure. Refer to Turbocharger Learn Procedure .