What is wrong if air will not flow from proper vents in a 1992 Buick Park Avenue?

Answer 1

Make sure there is vacuum going from the intake into the inside of the car. If it is, the problem is in the programmer and needs to be checked out by a mechanic. There is a small metal black box 1"x2"x1" with about 6 hoses running into it on the top of your intake manifold, and most likely a disconnected hose coming from a big black plastic box on your firewall, your vents don't open from the magic buttons on the dash, it uses the vaccum from the intake.....that same problem boggled my mind for about 3 months till I was changing the spark plugs one day and found a hose that went nowhere =P