GM Service Manual Online
For 1990-2009 cars only

Special Tools

EN-49090 Remover/Installer - Fuel Pump Lock Ring

Removal Procedure

    Caution: Refer to Fuel Pressure Caution in the Preface section.


    Object Number: 2042507  Size: SH
  1. Relieve the fuel pressure. Refer to Fuel Pressure Relief
  2. Warning: Refer to Battery Disconnect Warning in the Preface section.

  3. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
  4. Remove the rear seat. Refer to Rear Seat Replacement
  5. Remove the fuel pump access cover (1).

  6. Object Number: 2042509  Size: SH
  7. Disconnect the electrical connectors (2) at the fuel pump assembly.
  8. Disconnect the fuel outlet lines (1).

  9. Object Number: 2042511  Size: SH
  10. Remove the fuel pump lock ring by using EN-49090.
  11. Remove the fuel pump.
  12. Disconnect the insulator.

  13. Object Number: 2042515  Size: SH
  14. Remove the fuel sender assembly (1).

Installation Procedure


    Object Number: 2042516  Size: SH

    Note: Be careful to install the fuel sender to fuel pump housing exactly. If not installed exactly, fuel indicating may be incorrect.

  1. Install the fuel sender assembly (1).
  2. Connect the fuel sender insulator.

  3. Object Number: 2042511  Size: SH
  4. Install the fuel pump to fuel tank.
  5. Install the fuel pump lock ring by using EN-49090.

  6. Object Number: 2042509  Size: SH
  7. Connect the electrical connectors (2) at the fuel pump assembly.
  8. Connect the fuel outlet lines (1).

  9. Object Number: 2042507  Size: SH
  10. Install the fuel pump access cover (1).
  11. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
  12. Perform an operational check of the fuel pump.
  13. Install the rear seat. Refer to Rear Seat Replacement.