Truck A/C blowing mist out vents, what can cause this? Thanks for any ansers!!!! 2000 Gas

Welcome to the forum.

With the A/C running check under the truck to see if there is a puddle of water. The water that condenses on the cooling coils (evaporator) inside the heater A/C box is building up inside the housing and blowing out your vents. Straighten out a coat hanger and clean out the plugged line going to the bottom of the truck. Jack it up and look directly under where the heater A/C housing is. Usually it is just in back of the firewall.

Thank-You For your time and effort. I will do this first chance I get!!!!

Do you get a kind of sweet smell in the cab when running the defroster and heater? If so it indicates a leaking heater core. This causes high moisture content in the air coming out the vents with antifreeze making the mist on the inside of the windows feel oily and slick.

Dave / Believer45