Why won't the air AC blow out of my 2002 Cadillac deville at dash level but does blow out of the floor?

Answer 1

sounds like a vacuum leak to the mode door diaphram

2000+ Cadillacs don't use vacuum to control mode doors any more, they are electronic. Commonly, on these Devilles, the gears in the blend door motor get stripped & the unit has be replaced. Normally, these entails tearing out the whole dash to replace this unit (to the left of the radio behind the dash), because you have to "time" some levers that go to that door motor. With some practice, you can take out the climate control unit & the radio & install this unit, but you have to have plenty of patience!! Because customers are picky about dashes & the dash board corners are almost always coming unglued & folded, I prefer installing the unit without removing the dash.