Procedures

DRAINING FUEL TANK

Conventional Procedure





WARNING: The fuel system may be under constant fuel pressure even with the engine off. This pressure must be released before servicing the fuel tank.

Due to a one-way check valve installed into the fuel fill fitting at the tank, the tank cannot be drained at the fuel fill cap.

1. Perform the fuel system pressure release procedure Service and Repair

NOTE: Tool number 6539 is used on 5/16" fuel lines while tool number 6631 is used on 3/8" fuel lines.

2. Attach one end of the special test hose 6631 or 6539 at the fuel line quick-connect fitting (1).
3. Attach the opposite end of the special test hose 6631 or 6539 to the Fuel Chief Gas Caddy 320-FC-P30-A or an OSHA approved gas caddy.
4. Using a diagnostic scan tool, activate the fuel pump until the fuel tank has been evacuated.

Alternative Procedure





NOTE: If the electric fuel pump is not operating, the fuel tank must be removed and drained through the fuel pump module opening of the fuel tank.

1. Perform the Fuel System Pressure Release procedure Service and Repair
2. Disconnect and isolate the negative battery cable (1).
3. Raise and support the vehicle.
4. Remove the fuel tank Fuel Tank - Removal





5. Remove the fuel pump module (1) Fuel Pump Module - Removal
6. Position a 3/8" hose into the fuel pump module opening of the fuel tank.
7. Attach the opposite end of this hose to the Fuel Chief Gas Caddy 320-FC-P30-A or an OSHA approved gas caddy.
8. Using the gas caddy, evacuate the fuel tank.