GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: 

   • Remove the fuel injectors carefully in order to prevent damage to the injector electrical connector pins and the injector nozzle. Service the fuel injector as a complete assembly only. The fuel injector is an electrical component. Do not immerse the fuel injector in any type of cleaner.
   • Leaking fuel injectors may contaminate the engine oil with fuel.


    Object Number: 43568  Size: SH
  1. Disconnect the negative battery cable.
  2. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .
  3. Remove the fuel rail assembly. Refer to Fuel Injection Fuel Rail Assembly Replacement .

  4. Object Number: 78340  Size: SH
  5. Spread the injector retainer clip to release the injector from the fuel rail.
  6. Remove the fuel injector.
  7. Discard the injector retainer clip.
  8. Remove the injector O-ring seals from both ends of the injector.
  9. Discard the injector O-ring seals.

Installation Procedure


Object Number: 69058  Size: SH

Important: When ordering new fuel injectors, be sure to order the correct injector for the application being serviced.

The fuel injector assembly is stamped with a part number identification (2), a manufacturing date (3), a week code (1), and a production plant number (4).


    Object Number: 78340  Size: SH
  1. Lubricate the new injector O-ring seals with clean engine oil.
  2. Install the new injector O-ring seals on the injector.
  3. Install a new retainer clip on the injector.
  4. Push the fuel injector into the fuel rail injector socket with the electrical connector facing outward.

  5. Object Number: 43568  Size: SH
  6. Install the fuel rail assembly. Refer to Fuel Injection Fuel Rail Assembly Replacement .
  7. Tighten the fuel filler cap.
  8. Connect the negative battery cable.
  9. Inspect for leaks.
  10. 8.1. Turn the ignition switch ON for 2 seconds.
    8.2. Turn the ignition switch OFF for 10 seconds.
    8.3. Turn the ignition switch ON.
    8.4. Check for fuel leaks.