have a 2003 dodge 3500 it is blowing cold air out of the 2 drivers vents and cool air out of the other 3 vents does any one know why?

 

There's LOTS of posts about that problem. I had it too and I added freon and got it back to normal. Some trucks have dual zone temp control problems but mine is single zone. I'm guessing the air to the left side comes from the freon inlet side of the coil so it's the last to go. Craig