The 2008 GMC Sierra-2500HD runs on regular unleaded.
The 2008 GMC Canyon runs on regular unleaded.
The 2008 GMC Yukon runs on regular unleaded.
The 2008 GMC Savana runs on regular unleaded.
The 2008 GMC Acadia runs on regular unleaded.
The 2008 GMC Savana-Cargo runs on regular unleaded.
The 2008 GMC Sierra-3500HD runs on regular unleaded.
The 2008 GMC Sierra-1500 runs on regular unleaded.
The 2008 GMC Yukon-Hybrid runs on regular unleaded.
The 2008 GMC Yukon-XL runs on regular unleaded.
It's worth about $13,000. See quotes at http://www.edmunds.com/gmc/sierra2500hd/2006/index.html
what is the fuel tank capacity of a 2008 GMC Acadia
The 2008 GMC Savana has a 4-speed automatic.