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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L (LSY) - Repair Instructions >> Repair Instructions >> Engine Control Module Replacement >> Installation Procedure

Installation Procedure

  1. If replacing the engine control module, it is necessary to reprogram the replacement module. Control Module References
    GM5403399Courtesy of GENERAL MOTORS COMPANY
  2. Engine Control Module (1) - Install
  3. Connect engine control module electrical connector wire harness retainer at engine control module bracket.
  4. GM5417160Courtesy of GENERAL MOTORS COMPANY

    Reconnect the 3 electrical connectors (1) to the engine control module.

  5. GM5750722Courtesy of GENERAL MOTORS COMPANY

    Body Wiring Harness Junction Block Bracket (2) & Fuse Block - Move into position

  6. CAUTION:

    Refer to Fastener Caution .

  7. Body Wiring Harness Junction Block Bracket Bolt (1) - Install and tighten [2x] - Fastener Specifications
  8. GM5750689Courtesy of GENERAL MOTORS COMPANY

    Ground Cable Bolt (1) - Install and tighten @ Upper Core Support - Fastener Specifications

  9. Connect the negative battery cable. Battery Negative Cable Disconnection and Connection
  10. Use the scan tool to reset the engine oil life remaining back to the original percentage recorded.