I did a search and found numerous discussions about people wanting to convert from a single-to-dual climate control. But I want to do the opposite. My defrost door on my '03 broke yesterday, FOR THE THIRD TIME since I've owned the truck! #@$%! First time it was fixed under warranty. Last time, only 5 months ago, I paid nearly $900 for the out-of-warranty repair. :{ At that time, the dealer told me that the dual control was problemsome. This upcoming repair will be under warranty again (within 12 months and 12K miles of the last repair). I told the service manager that I wanted it converted to a single climate control. He said he's not sure if that's possible (I'm certain it IS possible). Anyone do this and know what parts have to be replaced to make the conversion? 
