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
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
"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