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Home >> Hummer >> 2005 >> H2 4D Utility Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Introduction >> Repair Instructions >> Fuel Injector Replacement >> Installation Procedure
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Installation Procedure

IMPORTANT: When ordering new fuel injectors, you must order the correct injector for the application being serviced.
    Fig 1: Locating Fuel Injector ID Number
    GM351196Courtesy of GENERAL MOTORS CORP.
  1. The fuel injector (1) is stamped with a part number identification (2). A four-digit build date code (3), which indicates the month (4), day (5), year (6), and the shift (7) that built the fuel injector.
    2. Fig 2: View Of Fuel Injector, Clip & O-Rings
    GM351185Courtesy of GENERAL MOTORS CORP.
  2. Lubricate the NEW fuel injector O-ring seals (2, 4) with clean engine oil.
  3. Install the NEW fuel injector O-ring seals onto the fuel injector.
  4. Install a NEW retainer clip (1) onto the fuel injector.
    5. Fig 3: Exploded View Of Fuel Rails & Injector Components
    GM350543Courtesy of GENERAL MOTORS CORP.
  5. Install the fuel injector (17) into the fuel rail injector socket with the electrical connector facing outward. The retainer clip (19) locks on to a flange on the fuel rail injector socket.
  6. Install the fuel rail. Refer to Fuel Rail Assembly Replacement .
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