2011 Gmc sierra duramax fuel mileage Read Also: 2011 Gmc duramax fuel mileage Gmc duramax fuel mileage 2008 Gmc duramax fuel mileage 2006 Gmc duramax fuel mileage 2005 Gmc duramax fuel mileage 2007 Gmc sierra duramax fuel mileage
