Vehicle Description
Just In From Second Owner
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 lb�ft 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 .
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
re-certification.
This is a consignment vehicle and the information above was
provided by the current owner. We can make no guarantees as to the
accuracy of the above information. However, please understand as
with all pre-owned automobiles, the described condition is
subjective
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numbers matching and/or original mileage. It has not been verified
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encouraged to verify this information on their own, prior to
purchase.
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incorrectness, imperfection, defect or damage. Any descriptions or
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