No, it's not. Either the port itself or the line is plugged, probably.
The hose coming up form the small port has a restriction in it (yellow plastic connector) that you may need to remove to get vac at the five way T connection.
If you have vac at the T with all the lines plugged, verify that both lines going off to the passenger side hold vac -- if not, the actuator for the EGR and air recirc valve are blown. You can replace them or just plug the lines at the T.
The other two lines are for the tranny shift control (lack of vacuum will produce VERY hard shifts) and the climate control (no vac gives you conditioned air, but only out the defrost vent).
Peter
