my 2003 2500hd wont change properly between selected settings. sometimes it will stay on defrost and will only go to feet if i turn it all the way to the left. it does work properly occasionally but usually not when i need it. i pulled the underhood fuse but it dosent seem to have reset anything. any other suggestions?
thanks

I have the same problem, only my in cab (HVAC1) fuse continually blows.

This may help you http://chevroletforum.com/forum/showthread.php?t=22624