2005 Gmc sierra 2500 diesel mpg Read Also: 2005 Gmc sierra 2500 diesel review 2005 Gmc sierra 2500 diesel reviews 2005 Gmc sierra 2500 diesel 2005 Gmc sierra 2500 diesel for sale Gmc sierra hd 2500 diesel 1996 Gmc sierra 2500 4x4 diesel