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Home >> Hummer >> 2009 >> H3T Alpha >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 5.3L - Introduction >> Repair Instructions >> Engine Control Module Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: ECM Bracket Tabs
    GM1897085Courtesy of GENERAL MOTORS CORP.
  1. Set the bottom of the ECM (1) into the bracket, and push the top of the ECM against the bracket. Ensure that the tabs (2) secure the ECM (1).
    2. Fig 2: Integral CPA Retainers
    GM1897083Courtesy of GENERAL MOTORS CORP.
  2. Connect the engine wiring harness electrical connectors (2) to the ECM.
  3. Engage the integral CPA retainers on the engine wiring harness electrical connectors.
    4. Fig 3: Body Wiring Harness Electrical Connector
    GM1897080Courtesy of GENERAL MOTORS CORP.
  4. Connect the body wiring harness electrical connector (2) to the ECM.
  5. Engage the integral CPA retainer (1) on the body wiring harness electrical connector.
  6. If a NEW ECM was installed, the ECM must be programmed. Refer to Control Module References .
  7. Install the windshield washer solvent container. Refer to Windshield Washer Solvent Container Replacement .
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