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2006 Hummer H3 problems

The most common problem on the 2006 Hummer H3 is electrical system, typically around 89,000 miles. It has 3.2 times the complaints of a typical H3 model year.

Year to avoid3.2x the typical complaints
Year score
31/100
Owner complaints
361
Recalls
4
Service bulletins
737
Worst area
Electrical
Fuel economy
16mpg
Typical repair
$3,183

The worst 2006 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.

Specific symptoms reported on the 2006 Hummer H3

Check engine light 31Won't start 25Misfire 23Fire or smoke 18Stalling 12Loss of power 10Coil spring 8Ball joint 6Water leak 6Grinding brakes 5Overheating 5

Trouble codes owners of the 2006 Hummer H3 mention

P0300 4

Recalls 4

Visibility: defroster/defogger/HVAC system: fan/motorReported July 1, 2015 · 164,993 vehicles affected
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: hoodReported April 30, 2010 · 162,129 vehicles affected
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

Air bags: frontalReported October 31, 2006 · 794 vehicles affected
What is wrong
Certain vehicles originally built with cloth seats that were equipped with an automatic air bag passenger sensing system and later reupholstered with aftermarket leather seat cover kits are involved. Testing has indicated that the aftermarket leather seat covers can cause the passenger sensing system to malfunction.
Risk
If the passenger sensing system malfunctions, the front air bag on the passenger side may be disabled when it should be enabled, or enabled when it should be disabled. In either case, in the event of a crash that requires air bag deployment, a front passenger's level of injury may be increased.
Remedy
Because a replacement leather seat cover that is compatible with the passenger sensing system is not available, general motors (gm) will repurchase these vehicles in accordance with the terms stated in gm's letter to owners. The recall began on november 6, 2006. Owners should contact gm at 1‑877‑477‑1022 to begin the process of repurchasing their vehicle.

Recall number 06V417000 · Recall details

Equipment: other: labelsReported December 7, 2005 · 32,068 vehicles affected
What is wrong
Certain trucks and sport utility vehicles fail to conform to the requirements of federal motor vehicle safety standard no. 110, "tire selection and rims." these vehicles were shipped with tire and loading information labels listing an inacccurate vehicle capacity weight.
Risk
A misprinted label could lead to improper vehicle loading specifications or tire inflation which could result in a tire failure, increasing the risk of a crash.
Remedy
Owners will be provided with corrected labels and installation instructions. At the customer's option, a dealer can install the label for them. The recall began on march 31, 2006. Owners may contact buick at 1‑866‑608‑8080, cadillac at 1‑866‑982‑2339, chevrolet at 1‑800‑630‑2438, gmc at 1‑866‑996‑9463, hummer at 1‑800‑732‑5493, pontiac at 1‑800‑620‑7668, saturn at 1‑800‑972‑8876, or isuzu at 1‑800‑255‑6727.

Recall number 05V552000 · Recall details

See all 4 recalls for the 2006 Hummer H3

Technical service bulletins for the 2006 Hummer H3 737

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

See all 737 bulletins for the 2006 Hummer H3

2006 Hummer H3 fuel economy

Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.

EngineDriveCityHighwayCombined
3.5L 5‑cyl4WD141816

What 2006 Hummer H3 owners say

Most recent owner complaints, unedited.

Filed Jul 21, 2026 · Electrical · MI

Theses templates dosent recognize the key and kicks on the security system which stops the motor from turning on. So you are stuck for 10 minutes then you can try again all so sometimes the motor tries to turn on by just sticking the key in the ignition before you even turn it. By looking at youtube alot of the H3s and the Colorados do this

Filed Jan 14, 2026 · Body, Engine · 130,000 miles · IN

The contact owns a 2006 Hummer H3. The contact stated that the frame was rusted on the driver's side. The check engine warning light was illuminated. The contact looked underneath the vehicle and was able to see through the subframe. The contact also noticed cracks in sub frame. The contact was concerned about driving the vehicle. The vehicle was taken to an independent mechanic who determined there was an issue with the temperature sensor. While receiving an oil change, it was determined that the subframe was rusted. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted and confirmed that there was no recall coverage for the failure. The failure mileage was approximately 130,000.

Filed Nov 11, 2025 · Engine · KY

The blower resistor and harness needs replaced it looks like it caught fire or default

Filed Aug 9, 2025 · CA

I was trying to get away from a stranger that was following me that was threatening and scary and when I got in the my Hummer h3 it wouldn't start its the ANTI THEFT that's thinking the car is being stolen this is happened several times of the car not starting i went to Google and YouTube and there's hundreds of videos complaining and giving instructions on waiting 10 min before trying to start the car , this is very dangerous especially for woman and it needs to be recalled and fixed before someone really gets hurt or killed , I was on scared

Filed Jan 2, 2025 · Electrical, Engine · TX

On the electrical, I refer to my air conditioning and heater. When I have my air selection to coldest and I drop 1 click for it to be less cool, my heater turns on and at times it smells like something burning. I have to turn it off . On the engine, after I hit 90,000 miles, I have to fill up my engine oil every 2-3 weeks because my vehicle is burning it quick or something. It doesn't leak oil at all. The oil just seems like it's burning somewhere and I ha e to be waisting money to buy oil $30 to $60 a month. Please help. Thank you!

Filed Dec 28, 2024 · Suspension · WV

Was driving this vehicle about 45 mph and began to shake violently. Was able to get it slowed down and back under control. Happened two more times on my drive home and took it to an auto repair shop today and found the frame is broken on both sides in front of rear leaf springs.

Filed Aug 27, 2024 · Engine · FL

Was heading home from work and the 2006 Hummer H3 shut off while traveling in the middle of traffic was able to cruise in Nuetral until I could stop to start car again started car and yet again I receive a cylinder misfire code which has been repaired on multiple attempts still no success. I am going to end up either crashing or an emergency vehichle will be trying to get by and I can't move because the motor shut down.

Filed Aug 23, 2024 · NY

Sunroof leaking creating water to leak into the driver seat, passenger seat, speakers on the door. Water trickling down from the Onstar system while parked and in motion this is a safety hazard. The only resolution that is given from GM is to blow out the hose to the sunroof, that’s not helping this issue is creating mole into the vehicle and once again it’s hazardous when driving As the water raining inside as well as outside of the vehicle. please help not seeing any recalls for this Manufacturing defect.

Filed Aug 22, 2024 · Engine · FL

Engine has very bad rough idle after multiple attempts to repair will get a misfire code often that goes on and comes off engine has rough idle to the point where truck shuts off completely while waiting at traffic light. My safety is at risk as this could happen during driving causing a wreck or during a light change when the emergency vehicles need me to move over and my truck don't run. Vehicle was inspected by multiple mechanic and still has issues. Check engine light comes on at time of motor failure or when rough idle.

Filed Nov 22, 2023 · Brakes, Transmission · WV

Frame Rust Entire frame needs replaced

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Questions about the 2006 Hummer H3

Is the 2006 Hummer H3 reliable?

Owners have filed 361 complaints about the 2006 Hummer H3, 3.2 times a typical H3 model year. It is one of the years we flag to avoid.

What is the 2006 Hummer H3 year score?

The 2006 Hummer H3 scores 31 out of 100 (poor). 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 2006 Hummer H3?

Electrical system, with 96 complaints, typically around 89,000 miles. Next is engine (87).

How many recalls does the 2006 Hummer H3 have?

4 recalls, covering visibility, structure and air bags.

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 2006 Hummer H3 get?

Official estimates for the 2006 Hummer H3 range from 16 mpg combined. The most efficient version (3.5L 5-cyl, 4WD) gets 14 city and 18 highway.

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