So this may be the dumbest thing GM does. If I use the auto function for the A/C (I always run the AC being in Florida) it shuts off the recirculating function for the A/C. This then lets hot moist air into the cab. My question, is there a way to use the auto function and still have the regulating function stay on? My Toyota would do the same thing but after you hit auto you could turn the recirculating function on and it would still stay in Auto mode. This was in a 2010 Highlander.