The first car in the Hummer Range, was the Hummer H1 based on the High Mobility Multipurpose Wheeled Vehicle (Hum-Vee). Originally released in 1992, this vehicle was designed by American Motors' AM General subsidiary for the US Military. The Hummer H2 is the second vehicle in the Hummer range. There are two models available: H2 SUV and H2 SUT. The H3 is the smallest of the Hummer models and is based on the GMT355 platform shared with the Chevrolet Colorado and GMC Canyon compact pickup trucks. __