 While Crichton's book features electric-powered Toyota Land Cruiser tour cars in Jurassic Park, Spielberg made a deal with the Ford Motor Company, who provided seven Ford Explorers.The Explorers were modified by ILM's crew and veteran customizer George Barris to create the illusion they were autonomous cars by hiding the driver in the car's trunk.Barris also customized the Jeep Wranglers featured in the production.