First off thanks Flatliner for the info.My GP is pretty base.I do not have DCC.I was told it was a bad vacume line.So I wanted a second opinion.The problem is when I turn the position selection control,99% of thr air is at the floor.No matter where I turn the knob.I get heat and a/c.So the temp control actuator works.I gess I was hope someone knows is this a machanical or just a hose.Thanks again.If anyone has driveline trouble i have a fair amount of experience.So just ask.