Two years ago, the Hummer H1, based on the military Humvee, was joined by the all-new Hummer H2. The H2 is based on GM's heavy-duty pickup trucks, but highly modified for increased off-road capability. Longer and taller than the original H1, the H2 is built at a new plant in Indiana. For 2005, the Hummer H2 SUV is joined by a second model called the SUT or Sport Utility Truck.The SUT version, as its name implies, is a pickup, not an SUV, characterized by its unique tailgate, short pickup bed, and tailgate-mounted full-size spare tire, which makes it a few inches longer than the SUV overall. The SUT features GM's innovative Midgate, which quickly converts the five-passenger SUV with a small pickup bed to a two-seat pickup with six-foot bed.