GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tool Required

J 39348 Fuel Sender Spanner Wrench

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: Always replace the fuel sender gasket when reinstalling the fuel sender assembly.


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. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in general information.
  4. Remove the fuel tank. Refer to Fuel Tank Replacement .
  5. 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.
  6. Disconnect the quick-connect fittings at the fuel sender assembly. Refer to Plastic Collar Quick Connect Fitting Service .
  7. 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.
  8. 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: 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. Connect the quick-connect fittings at the fuel sender assembly. Refer to Plastic Collar Quick Connect Fitting Service .
  6. Reinstall the fuel tank. Refer to Fuel Tank Replacement .
  7. Lower the vehicle.
  8. Add fuel and reinstall the fuel fill cap.
  9. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in engine electrical.
  10. Inspect for leaks:
  11. 9.1. Turn the ignition switch ON for 2 seconds.
    9.2. Turn the ignition switch OFF for 10 seconds.
    9.3. Turn the ignition switch ON.
    9.4. Check for fuel leaks.