FOR SALE: 2006 Hummer H1 ALPHA
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The Hummer H1 is a four-wheel-drive utility vehicle based on the M998 Humvee, which was created by AM General. The vehicle was produced from 1992 through 2006, and was the first of what became the Hummer line.
Originally designed strictly for military use, the off-road vehicle was released to the civilian market due to market demand. It was initially known as the ""Hummer""; however, under a 1999 deal, GM bought marketing rights to the Hummer name and called the vehicle the Hummer H1. At the time, GM began marketing the Hummer H2 that was also assembled by AM General on a modified GMC 2500HD chassis. AM General continued to build the H1 and Humvee in its Mishawaka, Indiana facility. GM stopped marketing the H1 in 2006 model year, but AM General continued production of the military Humvee versions.
The H1 models are inherently stable due to their wide track. They can ford 30 inches of water and climb a 22-inch step. Their stock ground clearance of 16 inches is made possible by tucking driveline components inside a channel in the central space between the left and right seats. They have high approach/departure angles of 72/37.5 degrees. Most H1s are equipped with a Central Tire Inflation System (CTIS), which enables the driver to increase or decrease the tire air pressure at the push of a button, since lower tire pressures are more suited for off-road, and higher tire pressures are desirable on-road.
The H1 features 16 inches of ground clearance as well as aggressive approach and departure angles, allowing it to clamber over a 22-inch high obstacle, handle a 60 percent grade and wade through up to 30 inches of water.
Hummer H1s have other unusual features, such as inboard brakes and portal gears that allow the drivetrain's half shafts a higher placement, for greater ground clearance. The radiator is up high, sloping over the engine on a forward-hinged hood. The air intake is high-mount, enabling the H1 to ford waist-level water. Rather than using simple runflat tires, magnesium-aluminum alloy or rubber inserts are an optional feature for runflat ability. Options included leather seats, a winch kit, and running boards.
The ""Alpha"" was an extensively re-engineered H1 that was equipped with GM's Duramax Diesel and 5-speed Allison transmission. The previous turbo-diesel engine suffered from sluggish sales; lack of power was one of the reasons for customer resistance. In 2002, AM General CEO Jim Armour took the idea of repowering the H1 to Bob Lutz and the GM Luxury Vehicle committee. GM soon approved the use of their Duramax/Allison powertrain for the H1. This would support the continuation of the H1; it would also represent an updating in terms of power, torque, refinement and the ability to meet 2004 heavy duty EPA emissions requirements.
The 8th digit of the VIN is 3, setting this version of the 6.6L Duramax apart from the versions used in pickup trucks. The GMT560 engine calibration was used with minimal modification; engine output was 300 hp and 520 lbft of torque. The Duramax engine was equipped with cooled exhaust gas recirculation and an internal engine oil cooler, thus, requiring a 40 percent heat rejection increase to engine coolant. Because space was limited between the air-lift brackets that protrude from the hood, the fan system was modified by putting it directly under the coolpack and driving it through a special gearbox directly off the crankshaft damper pulley. Several other cooling system modifications were required to assist with cold starting from 30 F (34 C).
Other major modifications included the use of special high-strength steel in the chassis frame, a more powerful steering gear; quieter axle differentials, redesign of the geared hubs to use quieter helical gears, new induction, exhaust and electrical power systems; and re-engineering of the fuel supply and filtration system.
The Duramax engine delivered more torque at lower engine speeds than the 6.5L, combined with a lower gearing ratio (about 44.5 to 1 in low lock) made the vehicle more powerful. Other changes included centralized tire inflation and a new interior.
Production launch was early in 2005, and continued until production ceased in mid-2006. All vehicles built during this time are classified as model year 2006 (10th digit in VIN is a 6.)
The program was cancelled May 12, 2006 because GM decided to withdraw technical and financial support for future engineering and recertification.