yes it can be done I have read an article on it before. I think I found it on an Avalanche site when I was researching how to put the DIC in my 03 1500HD. The guy that did it said it was very very involved and not for the typical do it yourselfer, he also said he would never do it again. get on google and search for avalanch forums and start to look.
Anything can be done. You have to ask yourself how much time and cash you are willing to spend. If you want to convert it may be best to buy a total loss with Auto AC and you will have all the sensors, switches and everything else. Or buy a new truck.
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