Sierra Classic 3500 4WD V8-6.0L (2007)
1. Lubricate the NEW injector O-ring seals (2, 4) with clean engine oil.
2. Install the NEW injector O-ring seals onto the fuel injector.
3. Install a NEW retainer clip (1) onto the fuel injector.
4. Push the fuel injector (17) into the fuel rail injector socket with the electrical connector facing outward. The retainer clip (19) locks on to a flange
on the fuel rail injector socket.
5. Install the fuel rail.