The vehicle was a 1966 GMC Handivan on the outside. Its insides were converted into a science lab of new technology that appeared more like a whisky still of old. The GM Electrovan was the brainchild of Dr. Craig Marks who headed up most of General Motors' advanced engineering projects. Marks, along with a staff of 250, developed the Electrovan for over 2 years before attaining a drivable vehicle.