The only thing is that it wasn't a real Hummer EV at all. A real Hummer EV wasn't used in the ad because there aren't any real Hummer EVs yet. In the case of GM's new 1,000-horsepower Hummer EV, engineers say they have cut the time down to just two years. For the Hummer EV, engineers used virtual testing. That's why GM is building real Hummer EV prototypes now.

Source: CNN November 21, 2020 13:41 UTC