Avalanche 1500 2WD V8-5.3L VIN Z Flex Fuel (2005)
2. Install the NEW crossover fuel pipe O-rings (7, 20) onto the crossover pipe rail assembly (25).
3. Install the crossover pipe rail assembly (25) to the left hand rail assembly (14) and the right hand rail assembly (15).
NOTE: Refer to Fastener Notice in Service Precautions.
IMPORTANT: When installing the retaining clip attaching screws for the crossover pipe, always start them by hand. This will prevent consequent
stripping of the threads on the rail.
4. Install the crossover fuel pipe retainer clip (21). Loosely install the retaining clip attaching screw (22).
5. Lubricate the NEW fuel return pipe O-ring (6) with clean engine oil.
6. Install the NEW fuel return pipe O-ring (6) on the fuel return pipe (1).
7. Install the fuel return pipe (1).
8. Install the fuel return pipe retainer (2). Loosely install the fuel return pipe attaching screw (3).
IMPORTANT: When installing the retaining clip attaching screws for the crossover pipe, always start them by hand. This will prevent consequent
stripping of the threads on the rail.
9. Install the crossover fuel pipe retainer clip (5). Loosely install the retaining clip attaching screw (4).
1. Tighten the crossover fuel pipe retainer clip attaching screws (4, 22) to 3.8 N.m (34 lb in).
2. Tighten the fuel return pipe attaching screw (3) to 5 N.m (44 lb in).
10. Install the fuel pressure connection core assembly (24) to the crossover pipe rail assembly (25).
11. Connect the fuel feed pipe (1) quick connect fitting to the fuel rail.
12. Install the fuel fill cap.
13. Connect the negative battery cable.
14. Use the following procedure in order to inspect for leaks:
1. Turn the ignition ON, with the engine OFF, for 2 seconds.
2. Turn the ignition OFF for 10 seconds.
3. Turn the ignition ON, with the engine OFF.
4. Inspect for fuel leaks.
