The H3 draws its power from a 3.7-liter, inline five-cylinder engine that generates 242 horsepower. It comes in two models: standard and H3X, and has the choice of two major option packages: Adventure package and Luxury package. The H3X is an urban styled H3 SUV with chrome exterior enhancements and a customized leather interior. Safety features that come standard with the H3 SUV include antilock brakes, traction control, frontal and side-impact airbags for the driver and front-seat passenger, and a tire-pressure monitoring system. For 2007, the HUMMER H3 SUV introduces the new H3X trim.