2004 Hummer H2 Problems, Complaints & Recalls
- Compared with other H2 years
- Far more complaints than other years 3rd of 8 for complaints
- Safety recalls
- 3 recalls: check your VIN
- NHTSA crash rating
- Not rated
Owners have filed 59 complaints with NHTSA about the 2004 Hummer H2. That ranks 3rd out of 8 H2 model years for complaints. The most reported problem area is electrical system (14 complaints, 24%), typically at around 98,720 miles. Complaints mention 6 crashes, 1 fire, 5 injuries. There are 3 safety recalls covering this model year. NHTSA has opened 2 defect investigations involving it.
- 59owner complaints
- 3safety recalls
- 2NHTSA investigations
- 6complaints mentioning a crash
Complaints are unverified owner reports and are not adjusted for sales volume.
Most common 2004 Hummer H2 problems
Complaints grouped by the part of the car owners reported, with the median mileage when the problem happened.
| Problem area | Complaints | Share | Median miles | Owners mention most | Typical repair cost |
|---|---|---|---|---|---|
| Electrical System | 14 | 24% | 98,720 | — | — |
| Visibility | 10 | 17% | 72,000 | — | — |
| Service Brakes | 8 | 14% | 93,007 | — | — |
| Service Brakes, Hydraulic | 6 | 10% | 36,000 | — | — |
| Steering | 6 | 10% | 43,600 | — | — |
| Air Bags | 3 | 5% | 49,770 | — | — |
| Structure | 3 | 5% | 11,000 | — | — |
| Suspension | 3 | 5% | 59,000 | — | — |
| Visibility/wiper | 3 | 5% | 98,720 | — | — |
| Electronic Stability Control (esc) | 2 | 3% | 165,975 | — | — |
| Engine | 2 | 3% | 165,975 | — | — |
| Power Train | 2 | 3% | 92,950 | — | — |
| Unknown or Other | 2 | 3% | 113,784 | — | — |
| Engine and Engine Cooling | 1 | 2% | 48,354 | — | — |
| Equipment | 1 | 2% | 10,000 | — | — |
| Exterior Lighting | 1 | 2% | 98,720 | — | — |
| Latches/locks/linkages | 1 | 2% | 41,400 | — | — |
| Seat Belts | 1 | 2% | — | — | — |
| Seats | 1 | 2% | 155,000 | — | — |
| Tires | 1 | 2% | 205,000 | — | — |
| Vehicle Speed Control | 1 | 2% | — | — | — |
| Wheels | 1 | 2% | 79,550 | — | — |
One complaint can list several problem areas, so shares can add up to more than 100%.
Complaints by year received
2004 Hummer H2 recalls (3)
Tap a recall to see the problem, the risk and the fix.
Seat belts:rear/other
Problem: On certain crew cab pickup trucks and sport utility vehicles, the 2nd row center occupant seat belt routing may make it difficult to position the lap portion of the safety belt low around the hips of occupants, especially smaller occupants, seated in this position. Appropriate use of a child seat or booster seat, as recommended for small children, does improve the fit condition for this user group. In addition to instructions on proper infant and young child restraint (with child seats or boosters), special verbiage for restraining older child is included in the owner's manual. Also, the suggested seat belt fit/routing for adults, irrespective of seating position, is described in the owner's manual text.
Risk: A lap portion of the seat belt routing that is not low and snug on the hips can allow the lap belt to ride up on an occupant's abdomen instead of fitting low around their hipbones, and therefore, can expose them to more risk of abdominal and internal organ injury.
Fix: Dealers will cut open the guide loop, remove a portion of the loop, and then the remaining two sides should be folded over and secured with a retainer free of charge. The recall began on july 21, 2005. Owners may contact cadillac at 1-866-982-2339, chevrolet at 1-800-630-2438, gmc at 1-866-996-9463, or hummer at 1-800-732-5493.
Service brakes, hydraulic
Problem: Certain trucks, sport utility vehicles, and vans equipped with bosch hydro-boost brake assemblies, the hydraulic brake booster pressure accumulator may crack and separate from the hydro-boost assembly during normal operating conditions.
Risk: If a separation occurred and the hood of the vehicle were open, fragments from the accumulator could cause injury to people in the immediate area. The presence of this crack or fractured surface could allow the hydraulic fluid to leak from the accumulator circuit of the booster assembly. The loss of fluid would cause increased steering and braking effort and a crash may occur without prior warning.
Fix: Dealers will test the hydro-boost assembly for functional operation of the two-function valve. If the hydro-boost assembly fails the test, dealers will replace the assembly free of charge. The recall began on march 23, 2005. Owners may contact chevrolet at 1-800-630-2438, gmc trucks at 1-866-996-9463 and hummer at 1-800-732-5493.
Service brakes, hydraulic
Problem: Certain sport utility vehicles, pickup trucks, and passenger vans fail to comply with the requirements of federal motor vehicle safety standard no. 135, ?passenger car brake systems.? Some of these vehicles were produced with an out-of-specification brake hydro-boost housing relief valve bore.
Risk: Consequently, the valve o-ring seal may fracture. Steering efforts may be slightly increased while braking or parking. Under certain driving conditions, a fractured seal may require a slight increase in the applied brake pedal effort to achieve the same vehicle deceleration rate as prior to the seat fracture.
Fix: Dealers are to replace the hydro-boost relief valve. The recall began on june 18, 2004. Owners should contact cadillac at 1-866-982-2339; chevrolet at 1-800-630-2438; gmc at 1-866-996-9463; or hummer at 1-866-486-6376.
To see whether a specific car still has an open recall, enter its VIN on NHTSA's official recall lookup. You can also decode a VIN here.
NHTSA defect investigations
- Hummer h2 steering knuckle failures (EA05017) — opened Oct 28, 2005, closed Apr 30, 2007.
- Steering knuckle fracture (PE04080) — opened Dec 2, 2004, closed Oct 28, 2005.
Recent owner reports
Short excerpts of the latest complaints filed with NHTSA, with personal details removed. Full reports can be searched on NHTSA.gov.
Odometer Fraud. The contact purchased a 2004 Hummer H2. The contact discovered a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 200,000. It was later discovered that the mileage on the Title was 210,000. Additionally, the…
Report states my vehicle has a recall on 2nd row seatbelts.
Yesterday I turned off the alarm and unlocked the doors via the keypad. I opened the driver door and my wife opened the passenger rear door and the Hummer H2 started. No key in the ignition and the fob does not have a start button. I then got in the car and inserted the key and turned the key to ON…
The contact owns a 2004 Hummer H2.The contact stated while driving at 35MPH, the contact stated the vehicle loss of control and forward momentum to the vehicle which caused the vehicle stalled and loss motive power. The contact who is a mechanic inspected the vehicle and notice that front…
Tl* the contact owns a 2004 hummer h2. While driving approximately 25 mph, the brake pedal was depressed and traveled to the floorboard. The stopping distance was extended. While examining the vehicle, the contact noticed brake fluid leaking under the subframe. The vehicle was not diagnosed or…
Other Hummer H2 years
See all Hummer H2 problems by year, every Hummer model, or the VIN decoder.
Similar Hummer models
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Frequently asked questions
What are the most common problems with the 2004 Hummer H2?
Owners most often report electrical system, visibility, service brakes problems. The top one, electrical system, accounts for 14 complaints.
Was there a recall on the 2004 Hummer H2?
Yes, 3 safety recalls. Enter your VIN at NHTSA.gov to check whether the repairs were done on your car.
Was the 2004 Hummer H2 a good year?
Complaint data can't fully answer that, because counts aren't adjusted for sales. Compared with other H2 model years, the 2004 has far more complaints than most years. Always get a pre-purchase inspection and check the VIN for open recalls.