GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

Nozzle Socket

Important: When removing an injection nozzle, use the nozzle socket. Remove the nozzle using the 30 mm hex portion. Failure to do so will result in damage to the injection nozzle.

  1. Remove the negative battery cables. Refer to
  2. Remove the fuel line clip.

  3. Object Number: 27624  Size: SH
  4. Remove the fuel return hoses (1) from the nozzle (2).
  5. Remove the fuel injection line.
  6. Cap the nozzle and the lines.

  7. Object Number: 263638  Size: SH
  8. Remove the injection nozzle using the nozzle socket.

Installation Procedure

Important: When installing an injection nozzle, use the nozzle socket. Install the nozzle using the 30 mm hex portion. Failure to do so will result in damage to the injection nozzle.


    Object Number: 263638  Size: SH
  1. Install the injection nozzle using J 29873 (apply anti-seize compound to threads of nozzle that contact the cylinder).
  2. Tighten the nozzle.
  3. Tighten
    Tighten the nozzle to 70 N·m (50 lb ft).


    Object Number: 27624  Size: SH
  4. Tighten the fuel injection line.
  5. Tighten
    Tighten the nut to 25 N·m (20 lb ft).

  6. Install the fuel return hoses (1) on the nozzle (2).
  7. Install the fuel line clip.
  8. Install the negative battery cables.