GMC have teased a concept of a rock crawling Hummer that will never make it to production. Simplyt titled the Hummer X Truck Concept, GMC are treating it as a testbed for new technologies, aesthetics, sustainability and community. Engineered as a modular platform, the styling is a bit more utilitarian than the production version Hummer EV with less body panels and a somewhat disconnected look revealing more of the underside.