Hello, I have an 05 Silverado and im getting only hot air from the drivers side vents with the lever set on cool, With a/c on and off. The passenger side vents work as they should whichever way i have the temp. control set. This has happened twice before and i would turn the truck off for a minute and this would seem to solve the problem but im not sure if this actually has anything to do with whats wrong. This does not change anything now. Any help with this is greatly appreciated. Thanks.