Hopefully one of the guys on here who works in a shop can get you a better answer, but I wouldn't count on anything being plug and play in these trucks. Saw a forum earlier hosted by GTPprix who said he could handle the reprogramming for Denali clusters, maybe PM him and pick his brain?
http://www.gm-trucks.com/forums/topic/161439-anyone-with-a-diesel-want-the-8-denali-instrument-cluster/