The HUMMER HX Concept debuted at the recent 2008 North American International Auto Show in Detroit, MI. The HX is HUMMER’s response to the recent trend of car manufacturers attempting to create the same type of vehicles we love with a more environmentally-friendly twist. The HX Concept is powered by a flex-fuel V6 mated to a six-speed automatic transmission, and is smaller, lighter, and more efficient than its siblings.
