I have a 2000 suburban and a 1999 Z71 I think they will make great 4bt swaps candidates. They both have locked up engines but clean titles they are on ebay now so don't wait. Just mu opinion it would be kick but to have a late model 4bt. My old Jeep is cool but one of these would be awesome.
eBay Motors: GMC : Sierra 1500 (item 170294413969 end time Jan-21-09 08:03:51 PST)
eBay Motors: Chevrolet : Suburban (item 170294410224 end time Jan-21-09 07:45:44 PST)