GM worked with the U.S. Army Tank Automotive Research Development and Engineering Center to develop the ZH2, a custom Chevrolet Colorado that ditches the usual internal combustion engine in favor of a removable fuel cell. The Colorado chassis has been stretched so that the body measures over 6.5 feet tall and 7 feet wide, and rugged upgrades include a new suspension and all-terrain 37-inch tires. Soldiers can also use the hydrogen-burning generator to make water or export power as needed in the field.
As for why the military is interested in the technology in the first place, a hydrogen fuel cell electric vehicle runs quiet and cool, and it offers high torque at low speeds. Field testing begins next year.