Cadillac announced today it will elevate its growing portfolio with a new, top-end, high-technology car. The as-yet unnamed Cadillac will go into production in the fourth quarter of 2015 at the Detroit-Hamtramck assembly plant. The addition of this new Cadillac is part of a previously announced $384 million investment in the facility on Detroit's east side. Tools and equipment unique to the Cadillac model were installed recently. "The objective for this upcoming model is to... continue