2011 Gmc sierra 2500 diesel mileage Read Also: 2003 Gmc sierra 2500 diesel gas mileage 2008 Gmc sierra 2500 diesel gas mileage 2006 Gmc sierra 2500 diesel fuel mileage Gmc sierra 2500 diesel mileage Gmc sierra hd 2500 diesel Gmc sierra 2500 diesel 4x4
