My AC/Heat works great but it will not switch from blowing from the floor vents to blowing out the dash vents, it use to do it aftewr a few minutes or so but now it has stopped doing it and stay on the floor vents no matter what switch location i put it on,should I assume since I am having problems with my Cruise that I have a vacum problem thats related to the venting system? I have the climate control option. Any help appreciated.
Dave