I have a 98 vette, and the air conditioning will come out of the passenger side vents (super cold), but only warm air comes out of the driver's side vents. It has a dual-control system, but no matter what I set things on, the driver's side still only blows warm air.

Does anyone have any suggestions besides looking through the 2,000 page tech manual (which I don't have)? I have a feeling that it's the vent flappers not functioning correctly, but I have no idea how hard it would be to get to the correct area under the hood.