2006 Gmc sierra 2500 diesel fuel mileage Read Also: 2008 Gmc sierra 2500 diesel gas mileage 2003 Gmc sierra 2500 diesel gas mileage Fuel mileage for gmc diesel trucks 2006 Gmc sierra 2500 diesel 2011 Gmc sierra 2500 diesel mileage 2008 Gmc sierra 2500 diesel fuel economy
