Sierra 1500 4WD V8-6.0L (2007)
Important: Lift evenly on both sides of the fuel rail until all injectors are removed from their bores.
Remove the fuel rail assembly.
27. Remove the fuel injector retainers (1).
28. Remove the fuel injectors (3) from the fuel rail.
29. Remove and discard the fuel injector upper and lower O-ring seals (2 and 4).
Installation Procedure
1. Lubricate the NEW fuel injector O-ring seals with clean engine oil.
2. Install the NEW fuel injector upper and lower O-ring seals (2 and 4) onto the injectors.
3. Install the fuel injectors (3) into the fuel rails.
4. Install the fuel injector retainers (1).
