I had them on my 2000 GMC and LOVED them. They worked great in the mud, snow and especially the ice. They are a little loud but I did not mind. I would also look into the Toyo Open Country M/T's. Here is a link
http://www.toyo.com/tires/tire_lines/off_road/opmt.html.
I had a set of these on my 04 Chevy and LOVED them as well. These were also fantastic in the mud, snow and ice. They were a quiet for how agressive they are.