2006 GMC Yukon Intake Manifold

You need to remove the throttle body and the fuel injectors, disconnect the electrical connectors, remove the knock sensor harness electrical connector, set the electrical harness aside, remove the vacuum brake booster hose, the positive crankcase ventilation (PCV) hose, the MAP sensor, the evaporative emission (EVAP) purge solenoid vent tube, the EVAP purge solenoid bolt, solenoid, and isolator, loosen the intake manifold bolts, remove the intake manifold and the intake manifold gaskets, discard the old intake manifold gaskets, clean and inspect the intake manifold.

You need to remove the EVAP tube end from the solenoid and the EVAP tube end from the vapor pipe.