Sierra Classic 2500 4WD V8-8.1L (2007)
19. Disconnect the evaporative emission (EVAP) tube from the purge solenoid.
20. Unclip the EVAP tube from the fuel rail.
21. Disconnect the EVAP tube from the vent pipe at the rear of the engine.
22. Remove the EVAP tube.
23. If replacing the intake manifold, remove the fuel rail studs.
24. Remove the fuel rail.
25. Important: Do not attempt to loosen the manifold by prying under the gasket surface with any tool.
Remove the intake manifold bolts.
