The height of the 2012 GMC Sierra-2500HD is 6 ft. 5.6 in. (77.6 in.).
It's worth about $13,000. See quotes at http://www.edmunds.com/gmc/sierra2500hd/2006/index.html
The height of the 2012 GMC Yukon is 6 ft. 4.9 in. (76.9 in.).
The height of the 2012 GMC Savana is 6 ft. 11.7 in. (83.7 in.).
The height of the 2012 GMC Canyon is 5 ft. 4.9 in. (64.9 in.).
The height of the 2012 GMC Terrain is 5 ft. 6.3 in. (66.3 in.).
The height of the 2012 GMC Acadia is 6 ft. 0.8 in. (72.8 in.).
The height of the 2012 GMC Yukon-XL is 6 ft. 4.8 in. (76.8 in.).
The height of the 2012 GMC Sierra-3500HD is 6 ft. 5.4 in. (77.4 in.).
The height of the 2012 GMC Yukon-Hybrid is 6 ft. 4.9 in. (76.9 in.).
The height of the 2012 GMC Savana-Cargo is 6 ft. 11.7 in. (83.7 in.).
The height of the 2012 GMC Sierra-1500 is 6 ft. 1.6 in. (73.6 in.).
The height of the 2012 GMC Sierra-1500-Hybrid is 6 ft. 1.8 in. (73.8 in.).