Thread: 98 Grand Prix GTP Heat/AC/Air control

anyone else? or do you know where this line could be?

I have this same problem! Only I have a GT, and it comes out of the floor vents very forcefully, barely out of the top vents, and barely out of the defroster. It will switch vents, but not to the top vent.

I am getting ready to replace the valve control, which is in the very corner on the front passenger side, under the glove compartment, near the firewall.