2005 Chevy Suburban Air Conditioning

I don't think were going to be able to handle this one you better think about taking it to a shop, the only thing I can think of is the automatic recirculation switch has malfunctioned, don't ask me what's located, but I think it's on the right front next to the radiator. There should be a junction where the AC go's to rear and to the front check if there's a switch their.