GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Notice: Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.

Important: Important always replace the fuel sender O-rings when reinstalling the fuel sender assembly.

Tool Required

J 39348 Fuel Sender Spanner Wrench.


Object Number: 51674  Size: SH
  1. Relieve the fuel system fuel pressure. Refer to Fuel Pressure Relief .
  2. Drain the fuel tank. Refer to Fuel Tank Draining .
  3. Remove the fuel tank. Refer to Fuel Tank Replacement .
  4. Clean all of the fuel pipe connections, all of the hose connections, and all of the areas surrounding the connections before disconnecting the connections in order to avoid possible contamination of the fuel system.
  5. Remove the quick-connect fittings at the fuel sender assembly. Refer to Servicing Quick Connect Fittings .
  6. Using the J 39348 Fuel Sender Spanner Wrench, remove the fuel sender assembly locking nut, the fuel sender assembly and the O-ring from the fuel tank.
  7. Discard the fuel sender assembly O-ring.

Installation Procedure


    Object Number: 51674  Size: SH
  1. Clean the fuel sender assembly O-ring sealing surfaces.
  2. Position the new fuel sender assembly O-ring on the fuel tank.
  3. Important: 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.

  4. Install the fuel sender assembly and the fuel sender assembly locking nut using the J 39348 Fuel Sender Wrench
  5. Install the quick-connect fittings at the fuel sender assembly. Refer to Servicing Quick Connect Fittings .
  6. Install the fuel tank. Refer to Fuel Tank Replacement .
  7. Lower the vehicle.
  8. Add fuel and install the fuel tank filler pipe cap.
  9. Install the negative battery cable.
  10. Inspect for leaks:
  11. 9.1. Turn the ignition switch to the ON position for 2 seconds.
    9.2. Turn the ignition switch to the OFF for 10 seconds.
    9.3. Turn the ignition switch to the ON position.
    9.4. Check for fuel leaks.