I have a 2003 Chevrolet 2500HD w/ a 6.0. The A/C will freeze you to death when moving, but barely blows cool when idleing. I realize that it may not blow as cold when idleing, but it is barely cool, on the verge of warm. The dealership put on a new compressor, then added 1/2 lb. of freon, then put on another new compressor. The problem still persists. Has anyone had this problem or heard of someone else having this problem?

 

I have a 2004 Chevy 2500HD and my AC does that same thing, its terrible when wanting to cool the truck down on a hot summer day. my dad owns a landscaping company and im always out during the hot months of the year working and this problem doesnt make it any nicer. it really sucks until you get moving and the AC gets super cold after that.