The automaker has built a hydrogen-powered truck for the U.S. Army that generates its own electricity with an onboard fuel cell. The heavily-modified Chevrolet Colorado-based rig is powered by a 174 horsepower electric motor that can drive all four wheels while making hardly any noise and keeping a low thermal profile compared to an internal combustion engine. Hydrogen tanks and a small battery are installed where the bed of the Colorado would normally be, along with a power-take-off unit that provides electricity for equipment in the field.