2003 General Motors Hy-Wire Concept

Concept cars are often little more than outlandish styling exercises with sensationally powerful engines designed only to titillate the often male-dominated auto show crowd into a certifiable frenzy. Then again, on the very rare occasion an entirely new way of building a vehicle is conceived. General Motors is touting its Hy-Wire as an example of the latter, the brand's global corporate teamwork at its best.