hey guys, i have a 2005 KC frontier 4.0 se, i have about 4,500 miles on her now. love the truck btw. ever since i bought it, sometimes when i come out in the morning and start it up, i get a weird smell coming from the vents. its almost like a musty smell, not quite tho. after a few minutes it goes away. it literally makes the whole cab smell like s#!t. I do live in FL, so i am sure the humidity doesnt help. also, we run the air alot down here, it could be from the air being run then shutting the truck off. Ill have to monitor that more, i just wanted to know if any of you guys have had the same issue with the ac or this smell.