my 07 tahoe ltz from day one (was bought out of warranty) has the 2 driver side vents occassionaly blowing vent or warm air when the ac is set to very cold. i usually shut those two off and turn the other vents toward me. I can live with it, as i have been for last 1.5 years, but just wondering is this an easy fix/diy job. if i can get this fixed as well as my dash replaced, i would be back to loving my tahoe