The Hummer H2 was produced by General Motors from 2002 to 2009. During its production run, GMC had two main generations of the Hummer H2. Here are some details for you to read about each generation.
First Generation Hummer H2 (2002 – 2007)
The first generation of the Hummer H2 was introduced in 2002 as a follow-up to the original Hummer H1. It featured a bold, boxy, and rugged exterior that was to resemble the military Humvee. The H2 was available in SUV and SUT (Sport Utility Truck) body styles. It was built on a modified version of the GMT820 platform, which was shared with other GM full-size trucks and SUVs. The H2 came equipped with a powerful 6.0-liter V8 engine that produced 316 horsepower; however, GMC tweaked the engine so that the H2 could produce 325 horsepower from 2004 – 2007.
The H2’s interior featured tri-zone climate control, leather upholstery, leather steering wheel, eight-way power seats, single-disc/cassette player with six-disc changer, and Bose sound system. As an option, you could have got the Adventure Package that would have given you features like adjustable rear suspension, powered sunroof, navigation system, and more for off-road adventures.
Second Generation Hummer H2 (2008 – 2009)
The second generation of the Hummer H2 was introduced in 2008 with several updates. Its exterior did not change a whole lot, but the interior was also enhanced with upgraded materials and technology features. These features included a new instrument cluster, improved gauges, dual-climate zone, Driver Information Center (DIC), auxiliary audio inputs, touchscreen GPS navigation, Bluetooth capabilities, and more. Mechanically, the second-generation H2 replaced the old V8 engine with a 6.0-liter V8 engine that had a six-speed transmission with 393 horsepower instead of the old 325 horsepower engine.
It's worth noting that the Hummer brand was discontinued by General Motors in 2010 due to economic challenges and environmental concerns. However, General Motors has recently revived the Hummer brand and introduced the all-electric GMC Hummer EV, which is a departure from the traditional H2 model.