GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .

  2. Object Number: 1275720  Size: SH
  3. Remove the fuel injectors from the fuel rail.
  4. Important: Visually inspect the fuel injector in order to determine if the upper O-ring was also removed. If the upper O-ring (1) is not removed, remove the O-ring from the fuel rail assembly.

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

Installation Procedure


    Object Number: 1275720  Size: SH

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

  1. Install the O-rings on the fuel injector (1).
  2. Install the fuel injector in the fuel rail with the connector facing upward.
  3. Install the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .