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Home >> GMC >> 2012 >> Yukon Hybrid, RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls/Fuel - Hybrid (LZ1) - Repair Instructions >> Repair Instructions >> Engine Control Module Replacement >> Installation Procedure

Installation Procedure

    Fig 1: View Of Bracket Retainer Tabs, ECM Bracket & Tab
    GM1960213Courtesy of GENERAL MOTORS COMPANY
  1. Set the bottom of ECM into the ECM bracket tab (2).
  2. Push the ECM (3) in securing the ECM to the bracket.
  3. Fig 2: View Of Engine Wiring Harness Electrical Connector & ECM
    GM1960211Courtesy of GENERAL MOTORS COMPANY
  4. Position the engine wiring harness electrical connectors and engage the retainers securing the connectors (2) to the ECM (1).
  5. Install the under hood electrical center. Refer to Underhood Electrical Center or Junction Block Replacement .
  6. Install the battery and battery tray. Refer to Battery Tray Replacement .
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  8. If a NEW ECM was installed, perform the service programing system (SPS). Refer to Control Module References .