GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  3. Drain the fuel tank. Refer to Fuel Tank Draining .

  4. Object Number: 331709  Size: SH
  5. Remove the fuel tank and sender assembly. Refer to Fuel Tank Replacement .

Disassembly Procedure

  1. Note the position of the fuel pump strainer on the fuel pump.
  2. Support the pump with one hand and grasp the strainer with the other hand.
  3. Rotate the strainer in one direction and pull off the pump. Discard the strainer after inspection.
  4. Inspect the fuel pump strainer. Replace the strainer if the strainer contains contaminates and clean the fuel tank.
  5. Inspect the fuel pump inlet for dirt and debris. If dirt or debris is found, replace the pump.

Assembly Procedure

Notice: Do not fold or twist the strainer when installing the sending unit. This action restricts fuel flow.

  1. Push on the outer edge of the ferrule until fully seated.
  2. Support the pump with one hand and position the new pump strainer on the pump in the same position as noted during disassembly.

Installation Procedure


    Object Number: 331709  Size: SH
  1. Install a new seal, sending assembly, and lock ring. Make sure the lock ring alignment holes fit over the tabs on the tank.
  2. Install the cam lock assembly. Turn the cam lock clockwise to lock.
  3. Install the fuel tank. Refer to Fuel Tank Replacement .
  4. Add the fuel removed from the tank.
  5. Connect the negative battery cable.
  6. Inspect for fuel leaks:
  7. 6.1. Turn ON the ignition for 2 seconds.
    6.2. Turn OFF the ignition for 10 seconds.
    6.3. Turn ON the ignition.
    6.4. Inspect for fuel leaks.