Getting cold here and I just started using the heat. I don't like hot air in my face because it makes me tired while driving so I usually use the floor vent selection. Well this truck when set onto floor only still blows a good amount out of air out of the upper vents too. I checked the truck floor vents front and rear and there's a good amount of air coming out both front and rear floor vents but its coming out the uppers a good amount too. Is this normal? Does your truck do this to or does it completely turn the upper off? Every other vehicle I've ever had has completely shut uppers off and only blown out of floor on the floor selections. Wondering if its typical or its a dealer run..