GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: 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.

Note: If the fuel injectors are found the be leaking, the engine oil may be contaminated with fuel.


    Object Number: 537311  Size: SH
  1. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement.
  2. Remove the fuel injector retaining clip (1).
  3. Remove the fuel injector (3) from the fuel rail.
  4. Remove and discard the fuel injector lower O-ring (4).
  5. Remove and discard the fuel injector upper O-ring (2).

Installation Procedure


    Object Number: 537308  Size: SH

    Note: Be sure to use the correct part number when ordering replacement fuel injectors.

  1. The fuel injector assembly (1) is stamped with a par number identification (2).

  2. Object Number: 537311  Size: SH
  3. Lubricate the NEW injector O-rings with clean engine oil.
  4. Install the fuel injector upper O-ring (2).
  5. Install the fuel injector lower O-ring (4).
  6. Install the fuel injector (3) to the fuel rail.
  7. Install the fuel injector retaining clip (1).
  8. Install the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement.