GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 870613  Size: SH
  1. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .

  2. Object Number: 870618  Size: SH
  3. Remove the fuel injector electrical connector.

  4. Object Number: 870623  Size: SH
  5. Remove the fuel injector retainer clip (1).

  6. Object Number: 870626  Size: SH
  7. Remove the fuel injector from the fuel rail.
  8. Important: Visually inspect the fuel injector in order to determine if the upper O-ring was also removed. If the upper O-ring in not removed, remove the O-ring from the fuel rail assembly.

    Important: If the fuel injector insulator cups are removed from the cylinder head while removing the fuel rail, new insulator cups must be installed.

  9. Remove and discard the fuel injector O-rings.

Installation Procedure


    Object Number: 894737  Size: SH
  1. If the fuel injector insulator cups (1) are removed from the cylinder head while removing the fuel rail, new insulator cups must be installed.

  2. Object Number: 870626  Size: SH

    Important: Always install new injector O-rings when servicing the fuel injectors. Lubricate the new injector O-rings with clean engine oil.

  3. Install the O-rings on the fuel injector.
  4. Install the fuel injector .

  5. Object Number: 870623  Size: SH
  6. Install the fuel injector clip (1).

  7. Object Number: 870618  Size: SH
  8. Install the fuel injector electrical connector.

  9. Object Number: 870613  Size: SH
  10. Install the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .