This futuristic SUV crossover remains one of the most advanced vehicles in General Motors history.  A preview of Buick’s future zero-emissions concept, the car is equipped with the automaker's Ultium electric drivetrain (equivalent to 583 horsepower), and said to have a 410-mile range on a single charge. With its sculptured ”Gran Turismo" body design, minimalist styling, massive greenhouse, and 23-inch wheels, the Electra Concept is unlike any Buick ever mass-produced