The H3 also shares the H2's off-road prowess. Short overhangs, aggressive approach and departure angles and nine inches of ground clearance help navigate rough terrain. The standard rear axle is a tall 4.56 ratio, and the standard push-button transfer case has a 2.64 crawl ratio. Customers may also opt for an even taller 4:1 transfer case and a full-locking rear axle for extra-slow rock crawling.
The H3 is built on GM's Canyon/Colorado platform, but with a sturdier frame and specially tuned shocks. The H3 also features a two-speed transfer case and electronically controlled four-wheel-drive system with traction control. The H3 also has the option of riding on enormous LT285/75R16 tires, the largest available on any midsize SUV.
The Hummer shares its 3.7L inline five-cylinder engine with its pickup siblings. It was enlarged from 3.5L for 2007, and now generates 242 horsepower and 242 ft-lbs of torque. The standard transmission is a five-speed manual, but Hummer does offer an electronic four-speed automatic transmission.
The standard suspension setup for 2007, the Z85 Handling/Trailering system, should be sufficient for most users. Those looking to test their H3s in the field will be interested in the ZM6 Off-Road Adventure suspension. This option includes a full-locking rear differential, the steeper 4:1 ratio transfer case and special off-road shocks.
The H3X package, new for 2007, features an upgraded Monsoon stereo, eight-way power heated front seats, and chrome accents on the exterior. A touch-screen navigation system is available, and includes the Monsoon stereo.
The WBL Tactical package gives the H3 a body-color grille, black brush guard, and black assist steps, while restricting the exterior paint choices to gray, black, and red.