2006 Gmc 2500hd duramax towing capacity Read Also: 2006 Gmc sierra 2500hd duramax towing capacity Gmc 2500hd duramax towing capacity 2007 Gmc sierra 2500hd duramax towing capacity Gmc sierra 2500hd duramax diesel towing capacity Towing capacity gmc 2500hd duramax 2006 Gmc 2500hd towing capacity