LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hummer >> 2005 >> H2 4D Utility Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Introduction >> Repair Instructions >> Fuel Injector Replacement >> Removal Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Removal Procedure

NOTE: Use care in removing the fuel injectors in order to prevent damage to the fuel injector electrical connector pins or the fuel injector nozzles. Do not immerse the fuel injector in any type of cleaner. The fuel injector is an electrical component and may be damaged by this cleaning method.
IMPORTANT: The Denso fuel injectors that are installed on the 5.3L (L59) E85 application will not have O-rings and retaining clips serviced separately. Therefore the fuel injectors will be replaced whenever an O-ring or clip needs to be replaced.
    Fig 1: Exploded View Of Fuel Rails & Injector Components
    GM350543Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The engine oil may be contaminated with fuel if the fuel injectors are leaking.
  1. Remove the fuel rail. Refer to Fuel Rail Assembly Replacement .
  2. Remove the fuel injector retainer clip (19).
  3. Remove the fuel injector (17).
    4. Fig 2: View Of Fuel Injector, Clip & O-Rings
    GM351185Courtesy of GENERAL MOTORS CORP.
  4. Discard the fuel injector retainer clip (1).
  5. Remove and discard the fuel injector O-ring seals (2, 4) from the injector.
scientia non olet · About LEMON Manuals