The locking front and rear axles on the H3T are borrowed from full-size GM trucks. Braking is accomplished with four-wheel discs from Alcon. The 15-inch-diameter rotors are clamped down upon with Baer six-piston calipers in the front and four-piston calipers in the rear. Nineteen-inch wheels are mounted at all corners.

A 350-horsepower, turbocharged version of GM's new Vortec 3500 inline five-cylinder engine powers the H3T, and it's backed by the heavy-duty Hydra-Matic 4L65-E electronically controlled four-speed transmission. The turbocharged five-cylinder produces more power than most six-cylinder engines, but is more compact. The engine also makes 350 lb.-ft. of torque, which helps the H3T tackle steep terrain with ease.

Fuel-saving variable valve timing technology, which is available on some of GM's four-, five- and six-cylinder engines, boosts the five-cylinder's efficiency by varying valve timing, lift and duration. It also improves emissions and overall performance.

Although currently a concept vehicle, the H3T was built with production-type components, including chassis and suspension components that were leveraged from existing GM truck architectures.

"Everything about the H3T says HUMMER," said Dean. "The package may be a little smaller, but the personality, functionality and, most importantly, the off-road superiority is all there."