Fuel Pump Replacement Cab/Chassis

1. Loosen the fuel fill cap to relieve the fuel system pressure.
2. Disconnect the balance pump electrical connector.
3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .



4. Clean the fuel line connections and surrounding areas at the pump before disconnecting to avoid possible fuel system contamination.
5. Disconnect the fuel lines from the pump.



6. Slide the pump out of the bracket.
7. Cap the fuel lines.

1. Remove the caps from the fuel lines.
2. Install the NEW fuel line O-rings.
3. Position the new balance pump into the bracket.

Notice: Refer to Fastener Notice in the Preface section.




4. Connect the fuel lines to the balance pump. Use a backup wrench to prevent the pump from turning.

Tighten
Tighten the fittings to 30 N·m (22 lb ft).

5. Lower the vehicle.



6. Connect the balance pump electrical connector.
7. Tighten the fuel fill cap.
8. Using a scan tool, command the fuel transfer pump on.
9. Prime the fuel system. Refer to Fuel System Priming .
10. Start the engine. If the engine stalls, repeat the above step.
11. Once the engine starts, inspect for fuel leaks.