Express 3/4 Ton Van V8-4.8L VIN V (2003)
Fuel Rail: Service and Repair
Fuel Rail Outlet Pipe Replacement
REMOVAL PROCEDURE
IMPORTANT: The fuel rail for the 5.3L regular production option (RPO) L59 (VIN Z) is compatible with fuel that has a composition of up to 85
percent Ethanol (E85). Because of this, the fuel rail will be serviced as an entire assembly that includes both left and right rail assemblies and the fuel
return pipe.
1. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure.
2. Disconnect the fuel feed (1) and fuel return (2) pipes from the fuel rail.
3. Remove the retaining clip attaching screw (4).
4. Remove the crossover fuel pipe retainer clip (5).
5. Remove the fuel return pipe attaching screw (3) and the fuel return pipe retainer (2).
6. Remove the fuel return pipe (1).
7. Remove and discard the fuel return pipe O-ring (6).
INSTALLATION PROCEDURE
