SAN FRANCISCO — Once upon time, Detroit automakers debuted crazy concept vehicles for auto shows like the six-wheeled Chrysler Voyager III and the V10-powered Tomahawk motorcycle and the 16-cylinder Cadillac Sixteen coupe.
Now, crazy gets put into production.
Behold the all-electric, 8,800-pound 2023 GMC Hummer SUV circus act in my hands. Four-wheel steer! 830 horsepower! Thirteen-inch suspension travel! Super Cruise drive assist! Zero-60 mph in a neck-snapping, Watts-to-Freedom-mode 3.5 seconds!