TrailBlazer 2WD V8-5.3L (2007)
1. Remove the fuel injectors (2) from the fuel rail (5).
2. Remove the fuel rail crossover pipe retaining clip screws (8) and retainer clips (9).
3. Remove the fuel rail crossover pipe (10) from the left and right hand fuel rails.
4. Remove and discard the fuel rail crossover pipe O-rings (11).
5. Remove the service port cap (7) and valve (6) from the fuel rail (5).
Assembly Procedure
1. Install the service port cap (7) and valve (6) to the fuel rail (5).
2. Lubricate the NEW fuel rail crossover pipe O-rings (11) with clean engine oil.
3. Install the NEW fuel rail crossover pipe O-rings (11) onto the crossover pipe (10).
4. Install the fuel rail crossover pipe (10) to the left and right hand fuel rails.
5. Install the fuel rail crossover fuel pipe retainer clips (9).
Important: When installing the retaining clip screws for the fuel rail crossover pipe, always start the screws by hand. This will prevent
stripping of the threads on the fuel rail.
6. Install the fuel rail retainer clip screws (8) but do not tighten at this time.
7. Install the fuel injectors (2) to the fuel rail (5).
Installation Procedure
