The 2013 GMC Sierra-3500HD runs on flex-fuel (FFV).
The 2013 GMC Yukon runs on flex-fuel (FFV).
The 2013 GMC Savana runs on flex-fuel (FFV).
The 2013 GMC Yukon-XL runs on flex-fuel (FFV).
The 2013 GMC Sierra-2500HD runs on flex-fuel (FFV).
The 2013 GMC Acadia runs on regular unleaded.
The 2013 GMC Terrain runs on regular unleaded.
The 2013 GMC Savana-Cargo runs on regular unleaded.
The 2013 GMC Yukon-Hybrid runs on regular unleaded.
The 2013 GMC Sierra-1500 runs on regular unleaded.
The 2013 GMC Sierra-1500-Hybrid runs on regular unleaded.
The 2013 GMC Savana has a 4-speed automatic.
No.