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Home › Chevrolet › 2005 › Avalanche 2500 › Repair and Diagnosis › External Pages › Different car › Section 18 (Engine Controls - 6.6L (Introduction)) › Repair Instructions › Engine Control Module (ECM) Replacement › Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2005 GMC Sierra, 2005 GMC Cab & Chassis Sierra, 2005 Chevrolet Silverado, and 2005 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    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.
  4. Connect the ECM electrical connectors (2).
  5. 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.
  6. If a NEW ECM was installed, program the ECM. Refer to Control Module References in Computer/Integrating Systems.
  7. Perform the turbocharger learn procedure. Refer to Turbocharger Learn Procedure .
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