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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1602 (Engine Control System & Fuel System - Hybrid (Hp2) 6.0L (LZ1) - Repair Instructions) >> Repair Instructions >> Engine Control Module Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Engine Wiring Harness Electrical Connector & ECM
    GM1960211Courtesy of GENERAL MOTORS CORP.
  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Single Battery) or Battery Negative Cable Disconnection and Connection (Dual Batteries) or Battery Negative Cable Disconnection and Connection (Auxiliary Battery) .
  3. Disengage the engine wiring harness electrical connector retainers and remove the connectors (2) from the ECM (1).
    4. Fig 2: View Of Bracket Retainer Tabs, ECM Bracket & Tab
    GM1960213Courtesy of GENERAL MOTORS CORP.
  4. Disengage the bracket retainer tabs (1) securing the ECM to the bracket.
  5. Remove the ECM (3) from the bracket.
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