GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1256147  Size: SH
  1. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
  2. Remove the fuel injector retainer clips.

  3. Remove the fuel injectors by pulling them down and out.
  4. Discard the fuel injector O-rings.

Installation Procedure


    Object Number: 1256143  Size: SH

    Important: Different injectors are calibrated for different flow rates. When ordering new fuel injectors, be certain to order the identical part number that is inscribed on the old injector.

  1. Lubricate the new fuel injector O-rings with engine oil. Install the new O-rings on the fuel injectors.
  2. Install the fuel injectors into the fuel rail sockets with the fuel injector terminals facing outward.
  3. Install the fuel injector retaining clips onto the fuel injector and the fuel rail ledge.
  4. Make sure that the clips are parallel to the fuel injector harness connector.
  5. Install the fuel rail assembly. Refer to Fuel Injection Fuel Rail Assembly Replacement .