The 2006 GMC Sierra-2500HD has a 11 ft. 1 in. (133 in.) wheel base.
It's worth about $13,000. See quotes at http://www.edmunds.com/gmc/sierra2500hd/2006/index.html
The 2006 GMC Savana has a 11 ft. 3 in. (135 in.) wheel base.
The 2006 GMC Canyon has a 9 ft. 3.3 in. (111.3 in.) wheel base.
The 2006 GMC Yukon has a 9 ft. 8 in. (116 in.) wheel base.
The 2006 GMC Yukon-XL has a 10 ft. 10 in. (130 in.) wheel base.
The 2006 GMC Savana-Cargo has a 11 ft. 3 in. (135 in.) wheel base.
The 2006 GMC Sierra-1500 has a 9 ft. 11 in. (119 in.) wheel base.
The 2006 GMC Yukon has rear wheel drive.
The 2006 GMC Canyon has rear wheel drive.
The 2006 GMC Savana has rear wheel drive.
The 2012 GMC Savana has a 11 ft. 3 in. (135 in.) wheel base.
The 2002 GMC Yukon has a 9 ft. 8 in. (116 in.) wheel base.