KnownCarProblems2004 Hummer H2 Problems and Recalls
Owners filed 59 complaints with NHTSA about the 2004 Hummer H2, most often about the electrical (24% of complaints, typically around 98,500 miles). It is the 3rd most complained-about H2 model year since 2000 and has 3 recalls.
Most common 2004 Hummer H2 problems
Electrical
14 complaints · 24%Half of these problems showed up before 98,500 miles. Parts named most often: instrument cluster/panel, ignition, instrument panel.
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…
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…
Brakes
14 complaints · 24%Half of these problems showed up before 73,500 miles.
The contact owns a 2004 Hummer H2. The contact stated that the vehicle was equipped to accommodate trailer brakes but the trailer brakes would not engage and caused the offroad light to illuminate. The vehicle was not taken to the dealer to be diagnosed or repaired. The VIN was not available. The failure and the…
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…
Visibility and wipers
13 complaints · 22%Half of these problems showed up before 78,000 miles. Parts named most often: windshield wiper/washer, rearview mirrors/devices, rear window wiper/washer.
I own a 2004 hummer2 and the wiper motor module started to smoke. At first my wipers would run without me even turning them on then they wouldn"t work at all. Then on feb. 19th,2004 as I was driving down the road , the wiper motor started to smoke. I had to stop in the middle of a main street to stop and pull the…
Windshield wipers were acting erratically, they would not turn off , then they would automatically go off and not back on, washer fluid pump continued to spray while wipers were either on or off until tank was empty. I had no control over the wipers.
Steering
6 complaints · 10%Half of these problems showed up before 43,500 miles. Parts named most often: linkages, hydraulic power assist.
(1) driving in parking lot approx 10 MPH, a vehicle cut in front of me, I cut sharply to the right. (2) my vehicle would not respond back to the left resulting in collision with a concrete pole causing $9000.00 damage to my vehicle. Later inspection by myself, local garage, insurance estimator and body shop revealed…
Tl contact owns a 2004 Hummer H2. While driving 55 MPH, the hydraulic service brakes became stiff and made it difficult to stop the vehicle. The contact also experienced steering failure, which nearly caused a crash. The Hummer manufacturer stated that his VIN was not included in NHTSA campaign id numbers 05v043000…
Suspension
3 complaints · 5%Parts named most often: front.
Front wheel linkage failure, wheel fell off. My brother and I nearly died today from an accident in my mothers H2. We had just left a friends house and were traveling at about 35 MPH when all of a sudden it seemed that the front driver side wheel broke free. The H2 violently swerved to the left and even though I am a…
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…
Body and structure
3 complaints · 5%Parts named most often: frame and members, body.
The 2 braided steel hood support straps exhibit premature corrosion within the rubber covers causing premature failure which may cause an injury during the unexpected failure when the hood is opened by user. The rubber covers hide the corrosion problem until failure occurs.
Tl contact owns a 2004 Hummer H2. The contact stated that during steady rainfall, water seeps through the windshield handle bar on both sides of the vehicle. On a previous occasion, the water shorted out the ignition and the vehicle began experiencing failure with the motherboard. The contact stated that the water…
Air bags
3 complaints · 5%The airbags did not deploy during a car accident. There were no events leading up to this. The vehicle was not in a previous accident, nor was the air bag indicator showing that there were any issues with the air bag.
Check system out and sensing module that controls the inflatable restraints has internal failure and will not communicate. The sdm needs replaced
Engine
3 complaints · 5%I own a 2004 Hummer h-2, no alterations to the engine, drive train, or chassis. While driving the vehicle will stall. This vehicle will just shut off at freeway speed. I took it to the dealership after the last event only to be told the following day that the truck is fine and not stalling.
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.
Complaints are owner reports to NHTSA, not verified defects. One complaint can name several components, so shares add up to more than 100%.
2004 Hummer H2 recalls
Seat belts: rear/other
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.
Full defect summary
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.
Brakes: service brakes, hydraulic
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.
Full defect summary
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.
Brakes: service brakes, hydraulic
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.
Full defect summary
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.
Recall repairs are free at any franchised dealer. Enter your VIN at nhtsa.gov/recalls to see which recalls are still open on your car.
NHTSA defect investigations
Hummer h2 steering knuckle failures
Summary
Odi upgraded this investigation at the conclusion of pe04-080.the alleged defect involves the failure of the steering knuckle at the lower ball joint boss, resulting in a separation of the lower ball joint from the knuckle.a lower ball joint separation could result in a loss of steering and/or a disabled vehicle. It appears that the fractures of h2 steering knuckles can be attributed to wheel/tire collision forces being transferred directly to the steering knuckle.the original knuckle design appears to be sufficient for the h2 application.evidence from inspected vehicles, photographs, police reports and edr data indicates collision impact events placed stress on the steering knuckle causing
Steering knuckle fracture
Summary
During the pe, odi investigated the hummer h2 for fractures which were occurring at the front steering knuckle lower boss.when the knuckle lower boss fractures, the lower ball joint stud is released and the entire knuckle and wheel/tire assembly separates from the vehicle.odi is upgrading this investigation to gain a full technical understanding of the factors which contributed to these failures.
Questions about the 2004 Hummer H2
- What are the most common problems with the 2004 Hummer H2?
- By NHTSA owner complaints: electrical (14 complaints, typically around 98,500 miles); brakes (14 complaints, typically around 73,500 miles); visibility and wipers (13 complaints, typically around 78,000 miles).
- How many recalls does the 2004 Hummer H2 have?
- 3 recalls listed by NHTSA, the latest from April 22, 2005 (seat belts). Check your VIN at nhtsa.gov/recalls to see which ones are still open on your car.
- Is the 2004 a bad year for the Hummer H2?
- It is the 3rd most complained-about H2 model year since 2000, with 59 complaints. Complaint counts are not adjusted for how many cars were sold, so popular years collect more of them, and the newest years have had less time to.