K 2500 Truck 4WD V8-5.3L VIN T (1999)
20. Remove the injector lower O-ring seal (4) from the spray tip end of each injector (3).
21. Discard the O-ring seals.
INSTALLATION PROCEDURE
1. Lubricate the new lower injector O-ring seals (4) with clean engine oil.
2. Install the new O-ring seals (4) on the spray tip end of each injector (3).
3. Remove the crossover tube to right fuel rail retainer (21).
4. Remove the crossover tube (25) from the right fuel rail (15).
5. Remove the O-ring (20) from the crossover tube (25).
6. Install a new O-ring on the crossover tube.
7. Lubricate the new O-ring with clean engine oil.
