Sierra 1500 2WD V8-5.3L Hybrid (2004)
Fuel Rail: Service and Repair
Fuel Rail Crossover Pipe Replacement
FUEL RAIL CROSSOVER PIPE REPLACEMENT
REMOVAL PROCEDURE
IMPORTANT: The fuel rail for the 5.3L regular production option (RPO) L59 (VIN Z) engine 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, this includes both left and right rail assemblies and
crossover pipe rail.
1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure.
2. Disconnect the fuel feed pipe quick connect fitting from the fuel rail.
3. Remove the fuel return pipe attaching screw (3) and the fuel return pipe retainer (2).
4. Remove the fuel return pipe (1).
5. Remove and discard the fuel return pipe O-ring (6).
6. Remove the fuel pressure connection core assembly (24) from the crossover pipe rail (25).
7. Remove the retaining clip attaching screw (22) and the crossover fuel pipe retainer clip (21).
8. Remove the retaining clip attaching screw (4) and the crossover fuel pipe retainer clip (5).
9. Remove the crossover pipe rail assembly (25) from the left hand rail assembly (14) and the right hand rail assembly (15).
10. Remove and discard the crossover fuel pipe O-rings (7, 20).
INSTALLATION PROCEDURE
