- The problem
- Certain fabtech aftermarket replacement pitman arms, p/nos. Fts71000 and fts71001, installed for use on certain 2001-2006 gm c/k 2500 pick up trucks and sport utility vehicles. The pin located inside the pitman arm can shear off due to a reverse bending fatigue condition, resulting in a total loss of steering control.
- The risk
- Loss of steering control could lead to a vehicle crash with potential injury or death.
- The fix
- Fabtech will notify owners and replace the pitman and idler arms free of charge. The recall is expected to begin during february 2006. Owners may contact fabtech at 909-597-7800.
Vehicle safety record
2004 Hummer H2 Problems, complaints & recalls
Owners have filed 59 complaints about the 2004 Hummer H2 with NHTSA, most often about the brakes (14) and the electrical system (14). Those complaints describe 6 crashes, 1 fire and 5 injuries. It is covered by 4 recalls, the latest in February 2006 for the steering. For comparison, the 2003 has 141 and the 2005 has 91.
NHTSA data checked
FFar more problems than a typical H2 year, for its age
#145 most complained-about 2004 vehicle
- Complaints
- 59
- Recalls
- 4
- Crashes
- 6
- Fires
- 1
- Injuries
- 5
- Deaths
- 0
Most common 2004 Hummer H2 problems
Share of all 59 complaints. One complaint can name more than one area. Tap an area for its complaints and recalls.
2004 Hummer H2 recalls 4
Recall repairs are free. Your dealer fixes them whether or not you bought the car there - check your VIN at nhtsa.gov/recalls to see if yours is done. What to do
- The 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.
- The 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.
- The 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.
- The 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.
- The 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.
- The 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.
- The 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.
- The 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.
- The 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.
What owners say
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59 complaints about the 2004 Hummer H2
Newest first, as filed with NHTSA by owners. Page 1 of 3.
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 contact stated she felt pressured to purchase the vehicle, signed the contract, and was unable to recoup the funds.
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 then to off and the vehicle would not shut off. Only after cycling through the gears was I able to shut off the vehicle. I have now disconnected the battery to prevent another unwanted start.
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 differential carrier bolt had snapped was detached from the frame and connection to the engine. The vehicle was towed to the contact residence then towed later to a local dealer who inspected the vehicle diagnosed the failure the...
Read the full complaint
same as the contact that front differential carrier bolt was damaged and to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was at approximately 100,000. Consumer stated component that failed is the front differential to front differential carrier connection.
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 repaired. The manufacturer was notified. The local dealer was not contacted. The failure mileage was 160,000.
Tl* the contact owns a 2004 hummer h2 equipped with aftermarket nitto mud grappler extreme tires, size: 37/13.5/20 (Na). The tires were purchased on november 28, 2018. The contact stated that the two front tires were worn more than halfway ever since they were purchased. The manufacturer was notified of the failure and stated that the tires were not designed for city driving. The tires were not replaced. The approximate vehicle failure mileage was 205,000 and the tire failure mileage was 2,000.
Whole cluster lights up on car door locks don't work radio won't go off air bag lights on all brake lights on , this was going down a city street driving
I am having a problem with my hummer 2004. The lock light comes on and my hummer will not start. This is so horrible the problem started about 3 months ago. Everytime that light comes on I have to waite 15to 25 minutes for it to start again.
Right front brake hose rubbing on wheel and cutting loss of fluid and braking effeteness was moving in driveway when it popped the mileage is 29236
Brakes lines under vehicle have excessive corrosion and have finally cracked, resulting in complete brake failure. Event did not result in accident. Vehicle has not been operated in a northern snow region nor coastal area.
As I was driving on I 5 in oregon I experienced a complete failure of the electrical system and brake systems. The vehicle was on cruise control and when I disengaged it all of the safety warning light appeared on the dashboard. I pressed on the brakes and they were a complete failure also. At this time the dashboard lights and controls went off and I loss power. I was able to get to the side of the road when I noticed smoke coming from under the hood. I got my daughter out of the vehicle to a safe distance and...
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opened the hood and the main fuse relay panel was fully engulfed in fire. I called 911. In the approx. 5 Min. The time the fire truck arrived the truck was consumed and fully gutted out from the fire.
My 2004 h2 has a serious rusting issue with the brake lines. On 2 separate occasions I have been driving along at approximately 30 mpg and hit the brakes only to have them go all the way to the floor. Luckily I did not an accident. In both occasions the line burst due to rust. My veh. Has 103,000.00 Lightly driven. Gm needs to come out and admit they have a problem with rusting brake liens before someone gets killed
I was driving home at night and about a mile before I got home my transmission didn't seem to shift as smooth as it usually does and when I parked in my garage I got out and transmission fluid was dripping out from under my h2 very quickly and by the next hour it had every bit run out and huge puddle of transmission fluid was all over my garage floor. I took the skid plate off my h2 and the transmission line had a hole rusted through it. Had I been another few miles away from getting home this could have destroyed my transmission and possibly caused me to wreck.
I have a 2004 hummer h2, the entire instrument panel malfunctions.. Fuel gauge, speedometer, oil gauges .Keyless entry will not work,etc. Reduced engine power message appears and vehicle automatically slowly reducing speed to 15 miles per hr while driving at high speed. Air bag light will not shut off. These issues are a safety hazard and I would appreciate assitance and resulution as soon as possible. This truck has less than 75,000 miles and has been well maintained. .
Check system out and sensing module that controls the inflatable restraints has internal failure and will not communicate. The sdm needs replaced
Gm is recalling 13,358 my 2003 hummer h2 vehicles. Some of these vehicles have a condition in which water can enter the windshield wiper motor module. If a sufficient amount of water enters the module, over time, the front windshield wipers may work intermittently or they may become inoperative. Read more at http://www.Cars.Com/recalls/hummer/h2/2003/#85k348wcjdlbcqxu.99
I was pulling out of my driveway in my hummer h2 when the brake pedal went to the floor. I got out of my h2 and noticed a large amount of brake fluid running out from under the rear end near the left rear wheel. I looked under the vehicle and noticed a brake line was rusted in two. I checked under the hood and saw that the brake fluid reservoir was completely empty. *Tr
I feel that this key problem falling out of the ignition, key will not turn on or off making it hard to control when the key is in the ignition and causing it not to start. I had this same problem on a 2003 isuzu ascender. Also the "driver information center" has quit working right which controls a lot of things on the vehicle. I think it is a defective switch from gm who also built my 2003 isuzu. *Tr
I was traveling on nj turnpike when my brakes didn't feel right. Almost no brakes stepping to floor. Then brake failure light came on. This is a garage kept vehicle with approx 14000 original miles. Appears brake lines are corroded. One owner. How could this happen. Is there a recall how can I obtain details for full recovery or reimbursement? *Tr
Tl* the contact owns a 2004 hummer h2. The contact stated that while driving approximately 35 mph, the brake pedal failed to respond when depressed repeatedly. The vehicle was driven uphill in combination of the emergency brake being engaged in an attempt to stop the vehicle. The vehicle was towed to an independent mechanic where the brake power booster was replaced. In addition, the master cylinder and brake lines were replaced at different times. The manufacturer was notified of the defect. The approximate failure mileage was 71,000.
I have a 2004 h2 my front windshield wipers will not shut off. I had to remove the wiper fuse in order to drive my truck on a sunny day. The switch is in the off position but they continue to stay on. I need help fast to continue to drive my truck in safe conditions. *Tr
While driving the vehicle on an extended trip on the highway, the heating element on the heated seats overheated and burned the right side below shoulder blade above waist, causing injury to my back. I went to a physician ,and now have a two large scars about 4.5 Inches in length. I had the seat warmer on a trip to nebraska, and the seat burned my back. *Tr
1. Voltage meter erratic 2. Windshield wipers stopped working, wipers stopped and remain in the middle of the windshield. 3. Dashboard instrument panel remained on with battery light and radio after switching off and locking vehicle. It was necessary to disconnect the battery to disable this condition. On morning of 5/17/2012, we reconnected the battery and voltage meter and instrument panel was normal. Windshield wipers are still inoperable. *Tr
Tl* the contact owns a 2004 hummer h2. The contact stated that the speedometer failed as he parked the vehicle. Contact noticed that the speedometer provided a reading of 80 mph instead of 0. On occasions, the speedometer would return to normal but would mainly read between 80-100 mph erroneously. The vehicle was taken to an independent mechanic where they advised him that a motor in the speedometer failed and needed to be replaced. The vehicle was not repaired nor was the manufacturer contacted. The failure mileage was approximately 43,000. The vin was unavailable.
Tl* the contact owns a 2004 hummer h2. The contact stated that the wiper motor for the front windshield became inoperable while the contact was driving in inclement weather, causing the contact to loss control of the vehicle and crash into a guard rail. The dealer and manufacturer were notified of the failure, but denied any assistance with repairs to the vehicle. The vehicle was not repaired. There were no injuries. A police report was not filed. The failure mileage was 70,000 and the current mileage was 80,000.
Hummer H2: every year compared
All H2 yearsQuestions about the 2004 Hummer H2
Does the 2004 Hummer H2 have any recalls?
Yes - NHTSA lists 4 recalls for the 2004 Hummer H2: steering (February 2006); rear / other (April 2005); service brakes, hydraulic (February 2005); service brakes, hydraulic (February 2004). Recall repairs are free at any authorized dealer. Enter your VIN at nhtsa.gov/recalls to see whether yours has been fixed.
What are the most common problems with the 2004 Hummer H2?
By the complaints owners filed with NHTSA, the most common problem areas are the brakes (14), electrical system (14), visibility & wipers (13).
How many complaints has the 2004 Hummer H2 had?
59 complaints have been filed with NHTSA, the first on July 25, 2004 and the latest on February 10, 2026. Of these, 6 describe a crash and 1 a fire, and together they report 5 injuries and 0 deaths.
Is the 2004 Hummer H2 a reliable vehicle?
Its Safety Index is 17 out of 100 (grade F: far more problems than a typical Hummer H2 year, for its age). The index weighs complaints, crashes, fires, injuries, deaths and recalls against how long the vehicle has been on the road, compared with the same model's other years. It is not a measure of every repair - read the complaints and owner experiences, and have any used vehicle inspected before you buy.
Which Hummer H2 years have the most complaints?
2003 (141), 2005 (91), 2004 (59). See every Hummer H2 year compared.
What should I do if my 2004 Hummer H2 has a problem?
If it is a safety problem, stop driving it if it is unsafe and contact your dealer. Report it to NHTSA at nhtsa.gov/report-a-safety-problem - enough reports start investigations and recalls - and share your experience here so other owners know what to look for.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data