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Home >> Cadillac >> 2011 >> STS AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 3.6L - Repair Instructions >> Repair Instructions >> Fuel Injector Replacement >> Removal Procedure
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Removal Procedure

  1. Relieve the high side fuel system pressure. Refer to Fuel Pressure Relief (High Pressure Pump) .
    2. NOTE:

    The fuel injectors have an alignment feature, note the position of the injectors alignment for installation.

  2. Remove the fuel injection fuel rail assembly. Refer to Fuel Injection Fuel Rail Assembly Replacement - Bank 1  or Fuel Injection Fuel Rail Assembly Replacement - Bank 2 .
    3. Fig 1: Identifying Fuel Injector Retaining Rings
    GM2004445Courtesy of GENERAL MOTORS COMPANY
  3. Remove and discard the three fuel injector retaining rings (1).
    4. Fig 2: Identifying Direct Fuel Injector & Harness Assembly
    GM2004498Courtesy of GENERAL MOTORS COMPANY
  4. Remove the direct fuel injectors and harness (1) as an assembly, and disconnect the electrical connector (2). If necessary, use the J 2619-01 with the J-37281-A in order to remove the direct fuel injectors evenly.
    5. Fig 3: Identifying Fuel Injector Components
    GM1977756Courtesy of GENERAL MOTORS COMPANY
  5. Remove and discard the following components from the fuel injectors (4).
    • Upper O-ring Seal (1)
    • Plastic Spacer (2)
    • Retaining Ring (3)
    • Isolator Cup (5)
    • Teflon Seal (6)
  6. Inspect the fuel rail injector bores and clean with J 39313 and EN-47909 , if required.
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