i was driving my hummer on the highway about 45 miles an hour when i felt somthing poped and the back started to sway back and forth so i startted slowing down and i was all over the road came to a stop on side of the road looked underneath and my drivers side wheel was all the way back against the body looked up and the frame had broken off and the spring in back also broke off rusted and the so called frame was so thin no wander it rusted why so thin they should be held accountable for making unsafe frame like this if i would have been on interstate beside a semi or other cars im shure me and others would have lost our lives no doubt i am very pissed about this i got my friend to bring trailer hauld home so now what junk or what i want them to fix it and loaner why they do.
The worst 2007 Hummer H3 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Electrical76
- Engine56
- Visibility42
- Body22
- Airbags19
- Transmission19
- Driver assistance13
- Fuel system12
- Brakes11
- Suspension6
- Steering5
- Acceleration4
- Seats4
- Tires3
- Lights2
- Locks2
- Seat belts2
Specific symptoms reported on the 2007 Hummer H3
Won't start 21Fire or smoke 17Stalling 13Overheating 11Loss of power 10Check engine light 9Misfire 8No deployment 6ABS 5
Recalls 2
Visibility: defroster/defogger/HVAC system: fan/motor
- What is wrong
- General Motors LLC (GM) is recalling certain model year 2006-2010 Hummer H3 vehicles manufactured February 5, 2005, to May 24, 2010, and 2009-2010 Hummer H3T vehicles manufactured May 21, 2008, to May 24, 2010. In the affected vehicles, the connector module that controls the blower motor speed for the heating, ventilation and air conditioning system may overheat.
- Risk
- If the blower motor connector module overheats, it can increase the risk of a fire.
- Remedy
- GM will notify owners, and dealers will replace part of the blower motor connector and harness, free of charge. The recall began February 26, 2016. Owners may contact Hummer customer service at 1‑800‑732‑5493. GM's number for this recall is 15042.
Recall number 15V421000 · Recall details
Structure: body: hood
- What is wrong
- Gm is recalling certain model year 2006 through 2010 hummer h3 vehicles. Some of these vehicles have a condition in which the integral clip-tabs on the louver on the hood may fracture, causing the hood louver rattle against the hood and become loose. If this indicator is unnoticed, additional clips could fracture and the hood louver could detach from the vehicle.
- Risk
- If the vehicle is being driving when this occurs, it could strike a following vehicle and cause injury and/or property damage.
- Remedy
- Dealers will apply an adhesive to the hood louver to secure it to the hood. This service will be performed free of charge. The safety recall began on april 12, 2010. Owners may contact hummer at 800‑732‑5493 or at the owner center at www.gmownercenter.com.
Recall number 10V179000 · Recall details
Technical service bulletins for the 2007 Hummer H3 822
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Unknown or other
- This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
- Unknown or other
- This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.
- Unknown or other
- Unknown or other
- Electrical system
- This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline...
- This service bulletin provides information on some vehicles that may rock or move slightly forward or...
- Unknown or other
2007 Hummer H3 fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 3.7L 5‑cyl | 4WD | 14 | 18 | 15 |
What 2007 Hummer H3 owners say
Most recent owner complaints, unedited.
The contact owned a 2007 Hummer H3. The contact stated that while the vehicle was parked, the AC was turned on, and the contact became aware of smoke entering the cabin of the vehicle. The smoke was coming from the front passenger's side underneath the dashboard. The AC was turned off, and the smoke ceased. The contact exited the vehicle and went into the store. The contact exited the store and was informed by a shopper that the vehicle was on fire. The vehicle was unoccupied. The fire was coming from underneath the hood of the vehicle. The Fire Department arrived on the scene and extinguished the fire. The Fire Inspector informed the contact that the fire was a thermal event related to HVAC wiring. In addition, the contact was informed of an unknown recall; however, the VIN was not associated with a recall related to the failure. The vehicle was destroyed. The charred remains of the vehicle were towed to a local tow yard. A Police report was filed. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 197,000.
Odometer Fraud. The contact purchased a 2007 Hummer H3. The contact discovered that there was a mileage discrepancy. The vehicle was an independent dealer sale. At the time of purchase, the vehicle mileage was 122,791 and at the time of registration, it was discovered that the mileage was 122,799 but additional documents also showed that the mileage was unchanged over a 3-year period.
The problem was unknown to me and probably would be to any vehicle owner that is not a mechanic. I was driving a death trap and didn't know how easily it could have been a serious problem. The driver side leaf spring bracket had completely broke apart from the frame on the upper drive side corner in an area that without getting underneath the vehicle with a flashlight and specifically looking for would be impossible to see. The only reason I know about it now is because I took it for an inspection and it failed due to this structural defect which the technician informed me was a very common issue with the 2007 H3 vehicles. He said that if I had been on a highway at 65/70 mph and this thing broke completely free the axle would swing out behind the vehicle on the drive side and cause an uncontrollable crash that could lead to severe injury and possibly death
Louver hood vent cover flew off on the highway as I was driving.
The contact owns a 2007 Hummer H3. The contact stated that while driving at various speeds, the hood louvers loosened without warning. Upon investigation, the contact discovered the federal safety agency Campaign Number: 10V179000 (Structure) which he linked to the failure. The dealer was notified of the failure and informed that the vehicle was already serviced prior under recall. The contact was provided an estimate for the repair. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 140,000.
I have the well known issue with the passkey security system. Nothing is wrong mechanically with the car but the security system will not allow the truck to start, therefore leaving me randomly leaving me stranded. Much has been documented on this issue, yet gm has never done a recall.
So the part that is a malfunction is the rear doors weren’t made with any child lock and of course one of my kids opened the door while i was driving on the highway.I have a 3 and 5 year old and it scared me so bad I had to hurry and pull the hummer over and park and just held my son. I couldn’t even drive after that because of how bad it traumatized me. My mom had to come get and take me and my kids home and drive my hummer back home. Even though we didn’t crash or one of my kids didn’t fall out.it’s still a very serious safety hazard. I reached out to gm to see what my options were and there response was how gm made child locks in 2007 and up and that’s not the truth because mine is a 2007 and it clearly doesn’t have child locks. Then they later proceeded to tell me I should just sell my vehicle. I was so upset because if one of my kids would have fallen out and something happened I would do everything in my power to make sure they were held accountable and file a lawsuit against them. Yes The vehicle is available to inspect. My kids safety was at risk and then me braking and pulling off the highway in panic mode could have caused an accident.it’s been reported to gm and also local dealers. There was no warning just when it happened scared me so bad because my kids are in my back seat. The photos I uploaded are of the transcribed voicemails and I’m willing to also submit the voicemails from gm as well.
The (2) u-joints , upper and lower, in the steering column were failing and the front wheels would not return to straight. According to the shop that replaced the u-joints they had failed. This is the second H3 with the same problem.
I bought my 2007 hummerh3 used w/124,000 miles. I've had it a month and already had it in mechanic shop due to not starting. The mechanic thought it was a fuel relay and charged me 258.00 parts/labor/tow. Today 11-16-21, only a day after I got it back, it stopped on me again!! Just had it towed again. Just learning that this is a common problem! Is anything being done to rectify this problem?
Compare the 2007 Hummer H3
Other model years
Questions about the 2007 Hummer H3
Is the 2007 Hummer H3 reliable?
Owners have filed 238 complaints about the 2007 Hummer H3, 2.1 times a typical H3 model year. It is one of the years we flag to avoid.
What is the 2007 Hummer H3 year score?
The 2007 Hummer H3 scores 47 out of 100 (below average). The score compares it with the other model years of the Hummer H3: 75 is a typical year, 50 means twice the usual complaints, and serious complaints and recalls lower it.
What is the most common problem with the 2007 Hummer H3?
Electrical system, with 76 complaints, typically around 90,000 miles. Next is engine (56).
How many recalls does the 2007 Hummer H3 have?
2 recalls, covering visibility and structure.
What year does the Hummer H3 have the most electrical problems?
The Hummer H3 model years with the most electrical complaints are 2006 (96 complaints), 2007 (76 complaints) and 2008 (34 complaints).
What gas mileage does the 2007 Hummer H3 get?
Official estimates for the 2007 Hummer H3 range from 15 mpg combined. The most efficient version (3.7L 5-cyl, 4WD) gets 14 city and 18 highway.
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