Fuel Hose/Pipes Replacement - Chassis (Front)

FUEL HOSE/PIPES REPLACEMENT - CHASSIS (FRONT)

REMOVAL PROCEDURE
1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure.
2. Clean all the fuel pipe connections and the surrounding areas before disconnecting the pipes in order to avoid possible contamination of the fuel system.




3. Disconnect the fuel feed and return pipes (8) from the engine compartment fuel pipes.
4. Cap the engine compartment fuel pipes.
5. Raise the vehicle. Refer to Vehicle Lifting.
6. Remove the fuel pipes retainer mounting stud (7) from the cylinder head.
7. Remove the fuel pipes retainer mounting stud (6) from the transmission.
8. Remove the fuel pipes retainer mounting fastener (5) from the crossrail.




9. Disconnect the fuel return pipe (2) at the coupler (3).
10. Disconnect the fuel feed pipe at the fuel filter outlet.
11. Cap the rear fuel pipes.
12. Note the position of the fuel pipes for aid in installation.
13. Remove the fuel pipes from the retaining clips.
14. Remove the fuel pipes.

INSTALLATION PROCEDURE




1. Remove the caps from the rear fuel pipes.

IMPORTANT:
- When replacing the fuel pipes, always replace them with original equipment or parts that meet the GM specifications for those parts. The replacement pipes must have the same type of fittings as the original pipes in order to ensure the integrity of the connection.
- Do not use copper or aluminum tubing to replace steel tubing. Only tubing meeting the 124-M specification or its equivalent is capable of meeting all pressure, corrosion and vibration characteristics necessary to ensure the durability standard required.

2. Connect the chassis fuel feed pipe at the fuel filter outlet.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the fuel feed pipe fitting to 30 N.m (22 lb ft).

3. Connect the fuel return pipe (2) at the coupler (3).

Tighten the return pipe fitting to 27 N.m (20 lb ft).




4. Install the fuel pipes into the transmission bracket retainer.
5. Install the mounting stud (6).

Tighten the mounting stud to 33 N.m (24 lb ft).

6. Install the fuel pipes into the cylinder head retainer.
7. Install the mounting stud (7).

Tighten the mounting stud to 33 N.m (24 lb ft).

8. Install the fuel pipes into the crossrail retainer.
9. Install the mounting bolt (5) to the crossrail.

Tighten the mounting bolt to 11 N.m (97 lb in).

10. Lower the vehicle.
11. Remove the caps from the engine compartment fuel pipes.
12. Connect the fuel feed and return pipes (8) to the engine compartment fuel pipes. Ensure the O-rings are in place.

Tighten the fuel feed and return pipe fittings to 30 N.m (22 lb ft).

13. Connect the negative battery cable.
14. Inspect for leaks.
1. Turn ON the ignition, with the engine OFF, for 2 seconds.
2. Turn OFF the ignition for 10 seconds.
3. Turn ON the ignition, with the engine OFF.
4. Inspect for fuel leaks.
15. Install the engine cover.