GM Service Manual Online
For 1990-2009 cars only

Tools Required

EN-48357 Injector Remover

Removal Procedure

    Warning: Refer to Battery Disconnect Warning in the Preface section.


    Object Number: 1820568  Size: SH

    Warning: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

  1. Disconnect the negative battery cable.
  2. Remove the high pressure fuel pipes. Refer to Fuel Injector Fuel Feed Pipe Replacement.
  3. Remove the injector return hoses. Refer to Fuel Return Pipe Replacement.

  4. Object Number: 1820570  Size: SH
  5. Disconnect the injector connector.
  6. Remove the injector bracket plug.

  7. Object Number: 1820571  Size: SH
  8. Unscrew the injector bracket bolt.
  9. Pull the injector bracket out from the injector using by the bolt manually.
  10. Remove the injectors with the washer upward.

  11. Object Number: 1820572  Size: SH

    Important: Number the injectors using a pen. If mixed up, it could influence engine performance.

  12. If the injectors stick to the cylinder head, use EN-48357 .

Installation Procedure


    Object Number: 1820571  Size: SH
  1. Inspect and clean the injectors and nozzle tip.
  2. Important: Do not reuse the injector washers, leaks may results. Do not wipe clean the nozzle tip area. It may damage the nozzle hole.

  3. Install the injector with a new washer.
  4. Insert the injector bracket into the injector groove.
  5. Caution: Refer to Fastener Caution in the Preface section.

  6. Tighten the injector bracket bolt.
  7. Tighten
    Tighten the injector bracket bolt to 28 N·m (20.7 lb ft).


    Object Number: 1820570  Size: SH
  8. Install the injector bracket plug.
  9. Tighten
    Tighten the injector bracket plug bolt to 7 N·m (62.0 lb in).

    Important: Do not reuse the fuel pipes. If reused, the contaminated pipes may be damaged the injectors or leaked from the pipes.

    Important: If new injectors were installed or the injector sequence was changed, reprogram the injectors using scan tool.

  10. Prime the fuel system. Refer to Fuel System Priming.