My transfer case established a large fluid leak so I inspected it, the findings was a large hole in the main housing on the transfer case fluid was leaking out. The transfer case was removed and disassembled, and found that the 2 screws that hold the chain guide to the housing had backed out or fell out and let the chain guide fall down in to the gear mechanism and ground it up and broke the main case. In result was the quarter size hole in the housing of the transfer case allowing liquid to escape and damage the housing. Leaving me without a vehicle.
The worst 2010 Hummer H3 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Electrical4
- Body1
- Engine1
- Transmission1
- Visibility1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Electrical4
- Body1
- Engine1
- Transmission1
- Visibility1
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 2010 Hummer H3 1,067
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Unknown or other
- Unknown or other
- Unknown or other
- Unknown or other
- Unknown or other
- New Vehicle Monitoring Programs Section in IVH
- Unknown or other
- This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
- This service bulletin provides information on Tire Sidewall Irregularities.
- This service bulletin provides information on replacing the intake manifold when the engine is replaced...
2010 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 | 15-16 |
| 5.3L 8‑cyl | 4WD | 13 | 16 | 14 |
What 2010 Hummer H3 owners say
Most recent owner complaints, unedited.
Tl* the contact owns a 2010 hummer h3. On many occasions, the vehicle would not immediately start and the security indicator illuminated. The vehicle had been serviced for the same failure many times at maritime motors (985 post rd, fairfield, ct). The fuel pump, alternator, and battery were replaced during the repairs, but the failure continued. The cause of the failure was not determined. The manufacturer was notified and provided case number: 95570738708. The failure mileage was 200.
The vehicle sometimes will not start due to a problem with the security sensor in the ignition switch. This is when starting up the vehicle and will only periodically occur. The security system light comes on and you have to wait 10 minutes to start the vehicle, then it will start. It has happened in the summer and now the winter.
While I was on the road going home I noticed that my temperature was slowly rising then all of a sudden my engine room was smoking I pulled aside and looked at the engine room the smoke was caused by the radiator leaking on front top cover of radiator was cracked... Don't get me wrong but I never did 4 wheeling on my hummer I drive it for my everyday commute that's about it...upon checking on blogs of other hummer owners they say its a common problem that's why I was amazed that it wasn't a part of any recalls I could have just imagined if im doing 4wheeling well anyways when I went to the dealership for repairs cause im confused also on their powertrain warranty cause the first sentence says radiator is included but the succeeding paragraphs says otherwise...since its a common known issue and believe me this the only part of hummer that dealership stock in their inventory should it be in a recall notice or at least have gm review it cause the way I see why the crack on the radiator happened was because of the flaw of the design of radiator support the metal lip on it rubs on front top cover portion so eventually this will give in plastic vs metal we all know whose gonna win but did am general knows this....my answer definitely like what I had mentioned already and tried at least 15 dealership (from california to texas to newjersey and michigan)that caters to hummer line all of them have one thing in common they stock radiators for hummer h3s...
My heating and AC blower motor stopped working on a vehicle that has less than 31k miles on it. The estimated repair costs are 500$, not including the tow, being that it is the middle of winter and the closest dealership is 20 miles away. Additionally, the time off of work and ebing without a car for a week. I have heavily researched this issue and it has been reported thousands of times and is a well known issue and gm has not issued a recall. The problem is that a faulty electrical short causes a wiring harness to melt, (smoking) with a burning smell and black residue. This is a major fire hazard and the recommended fix from the dealership only replaces the harness, buy does not address the core issue causing the fire hazard. This is like replacing burnt drywall to address faulty house wiring .
I was driving home and the fan on the A/C stopped working. Shortly afterward I detected a burning odor. I ended up replacing the resistor and wiring harness for the A/C blower motor. The resistor was burnt and the harness wire was slightly melted. I am concerned about the potential for a fire if this happens again.
Sun glare reflects off the chrome part placed on the engine hood and quickly blinds the driver for short periods of time causing very dangerous road driving conditions.
Compare the 2010 Hummer H3
Other model years
Questions about the 2010 Hummer H3
Is the 2010 Hummer H3 reliable?
Owners have filed 7 complaints about the 2010 Hummer H3, fewer than a typical H3 model year.
What is the 2010 Hummer H3 year score?
The 2010 Hummer H3 scores 95 out of 100 (good). 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 2010 Hummer H3?
Electrical system, with 4 complaints. Next is body (1).
How many recalls does the 2010 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 2010 Hummer H3 get?
Official estimates for the 2010 Hummer H3 range from 14 to 16 mpg combined. The most efficient version (3.7L 5-cyl, 4WD) gets 14 city and 18 highway.
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