Watch this video to get a better understanding of how drag coefficient works. "Drag coefficient describes a car's shape — not its size. Think of it as a coupon code that reduces or increases a car's effective frontal area, the measure of how big the air sees it. A low Cd can make a huge...

I am curious what kind of subscription/OTA options GMC will offer with the Hummer? We know they will probably sell satellite radio, Onstar, and Supercruise after three years. Apparently Mercedes will allow users to upgrade their rear wheel steering. I assume that Hummer will either have 10...

Here is a good example of the latest Supercruise version

Enjoy!