K 1500 Yukon Denali AWD V8-6.0L VIN U (2002)
21. Remove and discard the fuel injector lower O-ring seals (4) from the injectors (3).
INSTALLATION PROCEDURE
1. Lubricate the NEW fuel injector lower O-ring seals (4) with clean engine oil.
2. Install the NEW O-ring seals (4) to the end of each fuel injector (3).
3. Remove the retaining clip attaching screw (22) and crossover pipe retainer (21) to the right hand fuel rail.
4. Remove the crossover pipe rail (25) from the right fuel rail (15).
5. Remove the crossover pipe O-ring (20).
6. Lubricate a NEW O-ring (20) with clean engine oil.
7. Install a NEW crossover pipe O-ring (20) on the crossover pipe (25).
8. Install the crossover pipe (25) into the right fuel rail (15).
