Fuel Hoses and Pipes/Engine

Engine Compartment Fuel Lines:

Tools Required
J 37088 tool set, Fuel Pipe Quick-Connect Separator.

Notice: Do Not attempt to repair the engine fuel feed pipe or the engine fuel return pipe. if the engine fuel feed pipe or the engine fuel return pipe is damaged, replace it.

Removal Procedure

1. Relieve the fuel system fuel pressure. Refer to Fuel Pressure Release.

2. Clean all engine fuel pipe connections and areas surrounding the engine fuel pipe connections before disconnecting the engine fuel pipe connections to avoid possible contamination of the fuel system.

3. Remove the quick-connect fittings in the engine compartment. Refer to Quick-Connect Fittings.

4. Plug the chassis fuel feed pipe and the chassis fuel return pipe as required.

5. Remove the upper intake manifold assembly. Refer to Engine / Intake Manifold.

6. Remove the engine fuel return pipe from the fuel pressure regulator. Discard the O-ring.

7. Remove the engine fuel feed pipe from the fuel rail. Discard the O-ring.

Installation Procedure

Notice: Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application. General Motors will call out those fasteners that require a replacement afier removal. General Motors will also call out the fasteners that require thread lockers or thread sealant.

UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion inhibitors) on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and the joint clamping force, and may damage the fastener. When you install fasteners, use the correct tightening sequence and specifications.

Following these instructions can help you avoid damage to parts and systems.

1. Lubricate the new O-ring with clean engine oil, then connect the O-ring and the engine fuel return pipe to the fuel pressure regulator.

2. Lubricate the new O-ring with clean engine oil, then connect the O-ring and the engine fuel feed pipe to the fuel rail. Tighten the engine fuel pipe fittings to 17 Nm (13 lb ft).

3. Install the upper intake manifold assembly.

4. Install the quick-connect fittings in the engine compartment.

5. Tighten the fuel tank filler pipe cap.

6. Install the negative battery cable.