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Home >> GMC >> 2004 >> Envoy RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.2L (Introduction) >> Repair Instructions >> Fuel Injector Replacement >> Removal Procedure
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Removal Procedure

    Fig 1: View Of Fuel Injector, Clip & O-Rings
    GM351185Courtesy of GENERAL MOTORS CORP.
    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 engine oil may be contaminated with fuel if the fuel injectors are leaking.
  1. Remove the fuel rail assembly. Refer to Fuel Rail Assembly Replacement .
  2. Disconnect the fuel injector harness connector from the fuel injectors.
  3. Remove the injector retainer clip (1).
  4. Remove the fuel injector (3) from the fuel rail.
  5. Discard the injector retainer clip (1).
  6. Remove the injector O-ring seals (2, 4) from both ends of the injector. Discard the O-ring seals.
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