1999 Hummer H1 problems
The Hummer H1 is a full-size four-wheel-drive utility vehicle based on the M998 Humvee, which was developed by AM General when it was a subsidiary of American Motors Corporation (AMC). Originally designed strictly for military use, the off-road vehicle was released to the civilian market.
The civilian version was produced from 1992 through 2006 and was the first of what became the Hummer line. AM General built both the H1 and the Humvee in its Mishawaka, Indiana, facility. GM stopped marketing the H1 in the 2006 model year, but AM General continued production of the military Humvee versions through 2018.
History
In 1983, AM General Corporation was awarded a production contract for 55,000 High Mobility Multipurpose Wheeled Vehicles (HMMWV). Nicknamed the Humvee, the vehicles were used by the U.S. military and featured in photographs from the Persian Gulf War during the early 1990s. The vehicle was also promoted by actor Arnold Schwarzenegger, who was so interested in the Humvee design that he specifically advocated for AM General to produce a civilian version of the vehicle. After the Gulf War was over, AM General modified the M998 Humvee military version for the civilian marketplace powered by 6.2 L GM Diesel V8 engine. The civilian version of the Humvee, marketed as the Hummer, went on sale in 1992. The interior was largely influenced by semi-trucks.
Under a 1999 deal, General Motors bought marketing rights to the Hummer name, began marketing Hummer-branded vehicles designed by GM, and rebadged the original version built by AM General as the Hummer H1. At the time, GM began marketing the Hummer H2 that was also assembled by AM General on a modified GMC Sierra 2500HD chassis.
General Motors announced that 2006 would be the last model year for the Hummer H1, with civilian market production winding down in June 2006 due to new emission regulations for diesel-engined vehicles that were to take effect in 2007. The final 2006 models had the most powerful engine and also improved fuel efficiency—about 10 mpg‑US (24 L/100 km; 12 mpg‑imp).
AM General continued the production of military Humvee versions until 2018.
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Common 1999 Hummer H1 problems
The Hummer H1, produced from 1992 to 2006, is a formidable off-road vehicle with a rich military history. However, as with any vehicle, it has its share of common problems that potential buyers should be aware of.
- Chassis and Suspension Problems: The Hummer H1's heavy weight and rugged off-road use can lead to significant wear and tear on its chassis and suspension components. The front end, in particular, requires careful attention, as the vehicle's heavy weight and frequent off-road use can cause excessive wear on chassis parts, leading to steering issues and uneven tire wear.
- Transmission and Drivetrain: The Hummer H1's automatic transmission can also present issues, particularly in terms of selecting each of its ratios without difficulty. This can be a particular concern for vehicles that have been used extensively off-road, as the transmission may have accumulated significant wear and tear.
- Body and Roof Rust: Another common issue with the Hummer H1 is rust, particularly around the steel roof joint where it meets the aluminum body. This can be a particular concern for vehicles that have been used extensively off-road, as mud and water can accumulate in this area and lead to rust and corrosion over time.
- Electrical and Electronic Systems: The Hummer H1's complex electrical and electronic systems can also present issues, particularly in terms of the power distribution module (PDM) and the fuel injection pump. These systems can be sensitive to moisture and other environmental factors, leading to issues with starting and running the engine.
- Maintenance and Repair Records: As with any used vehicle, it is essential to carefully review the maintenance and repair records for any Hummer H1 before purchasing. This can help identify any recurring issues or areas of concern, as well as provide insight into the vehicle's overall condition and history.
In summary, the Hummer H1 is a powerful and capable off-road vehicle, but it is not without its share of common problems. Potential buyers should be aware of these issues and take the time to carefully inspect and test any vehicle they are considering purchasing. With careful inspection and maintenance, however, the Hummer H1 can provide years of reliable and enjoyable off-road use.
Are H1 Hummers reliable?
I just purchased my third H1-an Alpha. For the past 12+ years. I have been driving an SUV of one form or another- including Toyota Landcruisers, Mercedes G-500, Nissan Xterra, and H1 Hummers. The Hummers have been by far the most dependable, reliable, and pleasant to drive.
Why was the Hummer H1 discontinued?
General Motors announced that 2006 would be the last model year for the Hummer H1, with civilian market production winding down in June 2006 due to new emission regulations for diesel-engined vehicles that were to take effect in 2007.
How strong is a Hummer H1?
Driving the H1 Hummer
| Duramax Engine Specs | |
|---|---|
| Horsepower | 300 |
| Torque | 520 Pound-Feet |
How fast can a Hummer H1 go?
Mil-Spec quotes a top speed of 96 mph. Mil-Spec Hummer H1 rebuilds start at around $219,000, but optional features like the air-suspension system bump up the price of this vehicle to $290,837.
1999 Hummer H1 car problems categorized by type of issue
After analyzing all complaints sent to the NHTSA and researching popular Hummer H1 problems, we found that the most common problems with these 2023 model year vehicles are:
- Engine and engine cooling problems
The graph below shows statistics for all 1999 Hummer H1 vehicle components and the number of complaints received.
1999 Hummer H1 complaints
The NHTSA has received 1 complaints about various vehicle components related to the 1999 Hummer H1.
ENGINE AND ENGINE COOLING PROBLEM
- Date Of Incident: 2005-01-28
- VIN: 137ZA84336X
- Components: ENGINE AND ENGINE COOLING
- Summary: CONSUMER INQUIRED AS TO WHY THERE WAS NOT A RECALL ON THE DEFECTIVE #8 CYLINDER OF THE 1999 HI HUMMER.*MR THE #8 CYLINDER CRACKED RESULTING IN TOTAL ENGINE FAILURE AT 14000 MILES. *NM
Additional sources
More sources of information about 1999 Hummer H1 problems:
Which Year H1's have WHAT specific problems? - Hummer Forums ...
Mar 29, 2008 ... A customer of mine, tonite, was asking me about the H1. He wants to get one for bushwacking!!! Right now he uses a Suburban and is VERY ...
6.5L Turbo Diesel Hummer H1 1999 - Erratic RPM and throttle ...
The problem got worse over a period of a week. At first it occurred a bit after start up. Then the RPMs swung a bit (about every 4-6 seconds ...
Stupid question about the #8 cylinder issue... - Hummer Forums ...
I've got 84k and it still seems to be running strong, no known issues but a leaky power steering box. I've got an issue with my gall badder that ...
Hummer H1 VIN Lookup: Troubleshooting Common Problems ...
Jan 4, 2019 ... I have a problem with Hummer H1 VIN: 137ZA8436YE190072 2000year 6.5 turbo diesel There are 2 codes P0380 Glow - Answered by a verified GMC ...
Highest Miles on an H1 | Hummer4x4Offroad
May 21, 2016 ... Research through this and other forums and you will find some known common problems with these trucks. Some people purchase these trucks ...
Other years of Hummer H1
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