Gmc sierra 2500 duramax Read Also: 2007 Gmc sierra 2500 duramax for sale 2005 Gmc sierra 2500 duramax specs 2001 Gmc sierra 2500 duramax 2006 Gmc sierra 2500 duramax diesel Gmc sierra 2500 duramax mileage Gmc duramax 2500