FixVault
Home › Chevrolet › 2022 › Trailblazer L › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 1.2L (LIH) - Repair Instructions › Repair Instructions › Direct Fuel Injector Replacement › Installation Procedure

Installation Procedure

  1. Clean the fuel injector bores and clean the fuel injectors, if the fuel injectors will be re-installed. Direct Fuel Injection Fuel Rail Cleaning and Inspection
  2. GM5389544Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT use any type of lubricant when installing the NEW combustion fuel injector seal on the fuel injector tip.

    Install the EN-51955-2  short protector (4) onto the fuel injector tip. Place a NEW combustion fuel injector seal (2) on the EN-51955-2  short protector (4).

  3. Using the EN-51955-4  pusher (3), install the combustion fuel injector seal (2) into the recessed area (1) of the fuel injector, then remove the EN-51955-2  short protector.
  4. GM5389545Courtesy of GENERAL MOTORS COMPANY

    Compress the combustion fuel injector seal (1) using the EN-51955-3  pre-sizer (2).

  5. GM5389546Courtesy of GENERAL MOTORS COMPANY

    Using the EN-51955-5  Fuel Injector Seal Sizer (2), resize the combustion fuel injector seal (1).

  6. Install a combustion fuel injector seal on each of the remaining direct fuel injectors using the same procedure.
  7. GM5389548Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Check that the gaps of the two fuel injector seal retainers are aligned.

    Fuel Injector Seal Retainer - Red (3) - Install [3x]

  8. Fuel Injector Seal Retainer - White (2) - Install [3x]
  9. Fuel Injector Seal (1) - Install NEW [3x]
  10. Direct Fuel Injection Fuel Rail - Install - Direct Fuel Injection Fuel Rail Replacement 
  11. Perform the fuel pump trim reset.
About FixVault