GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Fuel Vapors can collect while servicing fuel system parts in enclosed areas such as a trunk. To reduce the risk of fire and increased exposure to vapors:

       • Use forced air ventilation such as a fan set outside of the trunk.
       • Plug or cap any fuel system openings in order to reduce fuel vapor formation.
       • Clean up any spilled fuel immediately.
       • Avoid sparks and any source of ignition.
       • Use signs to alert others in the work area that fuel system work is in process.

    Notice: Clean all of the following areas before performing any disconnections in order to avoid possible contamination in the system:

       • The fuel pipe connections
       • The hose connections
       • The areas surrounding the connections

    Important: Always maintain cleanliness when servicing fuel system components.

  1. Remove the fuel tank. Refer to Fuel Tank Replacement .
  2. Disconnect the fuel tank pressure (FTP) sensor electrical connector.
  3. Remove the fuel tank pressure sensor.
  4. Disconnect the fuel sender electrical connector.
  5. Clean the fuel pipes, and fuel sender assembly to prevent possible fuel contamination during removal.
  6. Disconnect the quick-connect fittings at the fuel sender assembly. Refer to Plastic Collar Quick Connect Fitting Service .

  7. Object Number: 66012  Size: SH

    Important: The retaining fuel sender assembly will spring-up when the ring is removed.

  8. Use a breaker bar to unlock the fuel sender lock ring. Hold down the fuel sender and remove the fuel sender retaining ring.
  9. Remove the fuel sender assembly.
  10. Remove and discard the fuel sender seal.
  11. Clean the fuel sender assembly sealing surfaces.
  12. Inspect the fuel sender assembly sealing surfaces.

Installation Procedure

Important: 

   • Care should be taken not to fold over or twist the fuel pump strainer when installing the fuel sender assembly, as this will restrict fuel flow. Also, assure that the fuel pump strainer does not block full travel of float arm.
   • Ensure that the fuel sender assembly retaining ring is fully seated within the tab slots on the fuel tank.


    Object Number: 66012  Size: SH

    Important: Always replace the fuel sender seal when reinstalling the fuel sender assembly.

  1. Position the new fuel sender assembly seal on the fuel tank.
  2. Place the fuel sender assembly into the fuel tank.
  3. Install the fuel sender assembly retaining ring.
  4. Connect the fuel sender electrical connector.
  5. Install the fuel tank pressure sensor.
  6. Connect the fuel tank pressure sensor electrical connector.
  7. Connect the quick-connect fittings at the fuel sender assembly. Refer to Plastic Collar Quick Connect Fitting Service .
  8. Install the fuel tank. Refer to Fuel Tank Replacement .