2006 Gmc sierra 2500 duramax for sale Read Also: 2007 Gmc sierra 2500 duramax for sale Gmc sierra 2500 duramax diesel for sale 2006 Gmc sierra 2500 duramax diesel 2006 Gmc sierra duramax for sale 2007 Gmc 2500 duramax for sale Gmc sierra 2500 duramax