2004 Hummer H1

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(3.0) 2 reviews
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Overview
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Key Specs

of the 2004 Hummer H1. Base trim shown.

  • Body Type:
    Sport Utility
  • Engine:
    205-hp, 6.5-liter V-8 (diesel)
  • Drivetrain:
    4x4
  • Seating:
    4 Seats
  • View more specs

Our Take

From the Cars.com Vehicle Test Team

The Good

  • Offroad capabilities
  • Hard-to-miss looks
  • Ultra-rugged demeanor

The Bad

  • Mammoth dimensions
  • Driveline noise
  • Clumsy on-road handling
  • Fuel economy
  • Cramped interior

Notable Features of the 2004 Hummer H1

  • Military-tested design
  • Turbo-diesel powertrain
  • 16-inch ground clearance
  • 30-inch fording depth
  • Crawl-speed operation

2004 Hummer H1 Overview

By Cars.com Editors
Vehicle Overview
Even after the new and smaller Hummer H2 arrived in 2003, the original Hummer H1 continued to capture attention. The H1 is the most noticeable and forbidding of all the sport utility vehicles on sale. It’s considered by many to be the toughest SUV, whether it’s rumbling down a paved road or through the most demanding offroad trek. The manufacturer bills the H1 as “the world’s premier offroad vehicle, rugged enough for Baja, refined enough for the country club.”

For 2004, the output of the H1’s 6.5-liter V-8 engine has increased by 10 horsepower and 10 pounds-feet of torque, and emissions have improved. An integrated in-dash six-CD changer is new this season. The optional front ELocker locking differential is now included in an Off-Road Adventure Package. Operating at the push of a button, it promises optimum slow-speed capability when climbing over big rocks or up long, steep grades.

Hummers are built at AM General’s plant in Indiana, but General Motors owns the marketing and distribution rights to the brand. The H1 comes as an open-top model and a four-door hardtop. Because of its weight, the H1 falls into a heavier-duty category than other SUVs and does not have to meet the usual federal safety, emissions and fuel-economy requirements.

Exterior
Not only does the Hummer present a massive appearance, but versatility is also one of its hallmarks. The overpowering H1 is easy to spot from a distance, with an overall length of ...
Vehicle Overview
Even after the new and smaller Hummer H2 arrived in 2003, the original Hummer H1 continued to capture attention. The H1 is the most noticeable and forbidding of all the sport utility vehicles on sale. It’s considered by many to be the toughest SUV, whether it’s rumbling down a paved road or through the most demanding offroad trek. The manufacturer bills the H1 as “the world’s premier offroad vehicle, rugged enough for Baja, refined enough for the country club.”

For 2004, the output of the H1’s 6.5-liter V-8 engine has increased by 10 horsepower and 10 pounds-feet of torque, and emissions have improved. An integrated in-dash six-CD changer is new this season. The optional front ELocker locking differential is now included in an Off-Road Adventure Package. Operating at the push of a button, it promises optimum slow-speed capability when climbing over big rocks or up long, steep grades.

Hummers are built at AM General’s plant in Indiana, but General Motors owns the marketing and distribution rights to the brand. The H1 comes as an open-top model and a four-door hardtop. Because of its weight, the H1 falls into a heavier-duty category than other SUVs and does not have to meet the usual federal safety, emissions and fuel-economy requirements.

Exterior
Not only does the Hummer present a massive appearance, but versatility is also one of its hallmarks. The overpowering H1 is easy to spot from a distance, with an overall length of 185 inches, a 130-inch wheelbase and a 71.6-inch track (the width between the wheels). Two fuel tanks that hold 25 gallons and 17 gallons are installed. Run-flat tires on 17-inch aluminum wheels are standard.

The H1’s 16-inch ground clearance is more than twice that of most SUVs. A 72-degree approach angle and a 37.5-degree departure angle intensify its climbing capabilities.

Interior
Four seats are spread around the perimeter of the interior. Occupants are separated by a massive center tunnel. Despite its militarylike external appearance, the H1 offers an appealing selection of comfort and convenience features, including an optional Monsoon sound system.

Under the Hood
The H1’s 6.5-liter turbo-diesel V-8 engine now develops 205 hp and a burly 440 pounds-feet of torque. The V-8 works with a GM four-speed adaptive automatic transmission and a permanently engaged four-wheel-drive system that has a Low range and locking differential. Hummer claims the H1 can climb grades as steep as 60 degrees.

Safety
Antilock brakes are standard. Because the H1 falls into a heavy-duty vehicle category, airbags are not required.

Driving Impressions
Nothing else approaches the experience of driving an H1. What might surprise the first-time rider is the close quarters inside the vehicle. The exterior dimensions are mammoth, but the interior layout places each occupant into an almost claustrophobic individual compartment.

Not for a moment do you forget that you’re inside a truck — and a mighty big one at that. All the sounds and drones demonstrate that fact. Despite an impressive ground clearance, it’s by no means impossible to get stuck. Fortunately, there’s a winch at hand to help pull you out of trouble.

 
Reported by Jim Flammang  for cars.com;
Posted on 8/27/03

Latest 2004 H1 Stories

Consumer Reviews

Exterior Styling
(4.5)
Performance
(3.5)
Interior Design
(5.0)
Comfort
(3.0)
Reliability
(3.0)
Value For The Money
(3.0)

What Drivers Are Saying

(1.0)

worst car i ever had i tell ta what

by hank hill from garland, TX on August 10, 2013

it was the worst car i ever had i tell ya what . it broke down several times. i hate it i tell ya what. Read full review

(5.0)

Most Reliable car ive owned

by really rich from New Yor, NY on January 7, 2008

Omg i just bought mine. Love it think ima buy another one two. one for off roading and for street driving naa meann, Read full review

Safety & Recalls

Recalls

The 2004 Hummer H1 currently has 0 recalls

Crash and Rollover Test Ratings

The 2004 Hummer H1 has not been tested.

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Cars.com Car Seat Check

Certified child passenger safety technicians conduct hands-on tests of a car’s Latch system and check the vehicle’s ability to accommodate different types of car seats. The H1 received the following grades on a scale of A-F.*
* This score may not apply to all trims, especially for vehicles with multiple body styles that affect the space and design of the seating.

Warranty FAQs

What is a Bumper-to-Bumper warranty?

Often called a basic warranty or new-vehicle warranty, a bumper-to-bumper policy covers components like air conditioning, audio systems, vehicle sensors, fuel systems and major electrical components. Most policies exclude regular maintenance like fluid top offs and oil changes, but a few brands have separate free-maintenance provisions, and those that do offer them is slowly rising. Bumper-to-bumper warranties typically expire faster than powertrain warranties.

What is a Powertrain warranty?

Don't be misled a 10-year or 100,000-mile powertrain warranty doesn't promise a decade of free repairs for your car. It typically covers just the engine and transmission, along with any other moving parts that lead to the wheels, like the driveshaft and constant velocity joints. Some automakers also bundle seat belts and airbags into their powertrain warranties. With a few exceptions, powertrain warranties don't cover regular maintenance like engine tuneups and tire rotations.

What is included in Roadside Assistance?

Some automakers include roadside assistance with their bumper-to-bumper or powertrain warranties, while others have separate policies. These programs cover anything from flat-tire changes and locksmith services to jump-starts and towing. Few reimburse incidental costs like motel rooms (if you have to wait for repairs).

What other services could be included in a warranty?

Some automakers include free scheduled maintenance for items such as oil changes, air filters and tire rotations. Some include consumables including brake pads and windshield wipers; others do not. They are typically for the first couple of years of ownership of a new car.

What does CPO mean?

A certified pre-owned or CPO car has been inspected to meet minimum quality standards and typically includes some type of warranty. While dealers and third parties certify cars, the gold standard is an automaker-certified vehicle that provides a factory-backed warranty, often extending the original coverage. Vehicles must be in excellent condition and have low miles and wear to be certified, which is why off-lease vehicles feed many CPO programs.

See also the latest CPO incentives by automaker