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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L (LSY) - Repair Instructions >> Repair Instructions >> Fuel Injector Replacement >> Removal Procedure
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Removal Procedure

  1. Remove the fuel injection fuel rail assembly. Fuel Injection Fuel Rail Assembly Replacement 
  2. GM5034350Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (2) - Disconnect [5x]

  3. Fuel Injector Wiring Harness (1) - Remove
  4. GM5034357Courtesy of GENERAL MOTORS COMPANY

    Ensure the EN-50791-100  Fuel Injector Installation Adapter (2) is mounted to the EN-50791  Injector to Rail Installer (1).

  5. Install EN-50791  Injector to Rail Installer (1) to the fuel injector (3).
  6. GM5034363Courtesy of GENERAL MOTORS COMPANY

    Using EN-50791  Injector to Rail Installer (1), compress the fuel injector (4) into the fuel rail.

  7. Fuel Injector Retainer (3) - Remove
  8. Remove the EN-50791  Injector to Rail Installer (1) along with the EN-50791-100  Fuel Injector Installation Adapter (2).
  9. Repeat the procedure for the other 3 fuel injectors.
  10. GM5034352Courtesy of GENERAL MOTORS COMPANY

    Fuel Injector (3) - Remove [4x]

  11. Fuel Injection Fuel Rail Seal (1) - Remove and DISCARD [4x]
  12. Fuel Injector Seal Spacer (2) - Remove [4x]
  13. Direct Fuel Injector Hold Down Clamp (5) - Remove and DISCARD [4x]
  14. Fuel Injector Nozzle Housing Seal (4) - Remove and DISCARD [8x]
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