The defense industry is a huge business, and GM is betting on a new prototype selected for testing by the US Army. Based on the Colorado ZR2, the Infantry Squad Vehicle looks nothing like the truck it's based on. The contract calls for a vehicle that can transport nine troops, be carried under a Blackhawk helicopter, and fit in the twin-rotor Chinook cargo copter. 70 percent of the ISV's parts are from the Colorado to help keep costs down, while removing nearly all the bodywork for a massive roll cage and skid plates to protect the drivetrain and suspension. A 2.8-liter diesel four-cylinder makes 186 horsepower and 369 pound-feet of torque, driving all four wheels through a six-speed automatic. Four rows of seats carry the required nine troops, with two rear-facing seats and two outward-facing seats behind the rear axle. Unlike a few recent commercial trucks converted to military standards, don't expect the ISV to show up in your local dealer any time soon.