2012 Gmc sierra 3500hd specs Read Also: Gmc sierra 3500hd specs 2008 Gmc sierra 3500hd specs 2012 Gmc sierra 3500hd denali specs 2011 Gmc sierra 3500hd specs 2006 Gmc sierra 3500hd 2012 Gmc sierra 3500hd regular cab 4wd
