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Resources for the Repair and Maintenance of your Hummer H3

Hummer H3 Models:

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Hummer H3 Problems

Exhaust & Emissions -- Verified

A Loose or worn gas cap may cause Check Engine Light to illuminate.

Engine -- Verified

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The engine may develop a misfire due to worn valve seats. This fault will cause the Check Engine Light to illuminate. Replacement of the cylinder head may be required to correct this concern.

Electrical & Lights -- Verified

The fuel level sensor in the fuel tank may fail causing erratic fuel gauge operation. Our technicians tell us that on high mileage vehicles you may wish to replace the complete fuel pump module assembly if this condition occurs.

Miscellaneous -- garyj0nes and 1 other

I was in Death Valley, CA off roading. Nothing too major. The second day we were traveling down a gravel road when BANG! The side airbags on both sides of the car deployed. I have it in the shop right now and awaiting response.

Hummer H3 Recalls (Recent)

Body, Interior & Misc., November 6, 2006

Summary: 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.

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Body, Interior & Misc., March 31, 2006

RepairPal Expert Overview:

The tire and loading information label on the driver's side door frame may be inaccurate. A misprinted label could lead to overloading of the vehicle, which could possibly lead to tire failure and a crash. Owners will be provided with corrected labels and installation instructions. At customers' request, a dealer can install the label for them. The recall began March 31, 2006. The GM recall number is 05109.

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Body, Interior & Misc., April 10, 2009

RepairPal Expert Overview:

The front fuel tank support strap may fracture. It it does, the fuel tank would only supported by the rear support strap and the stone shield. Continued driving would eventually fracture the rear support strap and shield fasteners. The fuel tank separating from the vehicle could increase the risk of a crash. Dealers will install an updated fuel tank support strap. The recall began April 10, 2009. The General Motors recall number is 09048.

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Body, Interior & Misc., April 12, 2010

RepairPal Expert Overview:

The retaining clips on the non-functional hood louver could brake. The louver could become loose and/or separate from the vehicle. If this were to happen while the vehicle is in motion, personal injury or property damage could result. Dealers will apply adhesive to the underside of the hood louver to secure it. The recall is scheduled to begin on April 12, 2010. The General Motors recall number is 10088.

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Hummer H3 Questions and Answers

cfipilot, 2006 Hummer H3, Saint Charles, MN

Why does the stability system failed light stay on even on good roads? What does it mean and how do you fix it?

cpagal58, 2006 Hummer H3, Front Royal, VA

Two days ago the H3 was making a chirping sound. Yesterday, water was in my garage. I was driving home from the commuter lot and I got a message saying A/C off, engine hot. The thermostat was on...

ctebano, 2006 Hummer H3, Schenectady, NY

power lock & driver side window do not work - fuses look good.
- The lock/unlock buttons on the doors and key do not work either.
- However, I do hear a cliking noise from the fuse box, the...

Visitor, 2006 Hummer H3, Canton, OH

do I have to replace both the coil pack and plug. Is the a problem with the head?

rudyloco, 2006 Hummer H3, Fort Lauderdale, FL

If the light turns on, can it cause damage to the vehicle while driving it to the service department?

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Hummer H3 Reviews

Love the vehicle. Used to have an H1 as a company vehicle and fell in love with them. As a private buyer and not a business the H3 fit the bill. Not as bad on gas as I thought it would be, I am averaging about 19-20 MPG. I have taken it rock climbing and found it a very capable off road vehicle and I like the size and weight for in town and highway driving. It makes me feel safe and it still does stand out in a crowd...not many in town, so people can find by looking for the vehicle...LoL.
PS, I am actually in Sault Ste. Marie, Ontario, Canada.
PPS...works great in the snow too.

I have owned 2 hummers H3;s Love the ride , love every thing about it. turns on a dime, don't have to plow,haha
but now when I turn it over it decides it won't. give it 5-10 minutes and it starts! what is up with this???? Susan

Check engine light came on sent vehicle to dealer to check out since onstar did a diagnostic check at my request. And informing me that there was a P0520 (emission sensor) and a P0442 (Oil Pressure sensing system). Dealer Quote 80413 worn shorted labor 2.5 hrs. verify customer concern diagnose found DTC P0106, P0520, p0442 set.check system circuit found DTC P0442 small evap leak set due to bad- O-ring seal inside gas cap. replace gas cap retest pass road test pass. 13 CPK 337.50
1 PCM-REMAN 410.32
1 CAP 41.40
The also check for a coolant leak
CREDIT ME FOR ANOTHER 2.5 HRS. FOR Diagnostic codes supplied by Onstar Dealer Quote (Pressure test coolant system found coolant leaking from radiator along Top of Radiator. Replace top off coolant. retest pass.
13 CPK 337.50
1 Radiator 413.51
1 Coolant 19.28
1 Fluid 7.07
AFTER GETTING MY VEHICLE BACK THE VERY NEXT DAY AIR CONDITION FAN JUST STOP !!
I figured that this was something they did guess what??
cost me another 485. for sensory for fan sensory unit.
my Hummer H3 true story.
Factory warranty ends at 80,000 my truck was at 80,413 over limit.

I bought my 2006 H3 Adventure pakage when it hit the market. For all of its faults, i dont consider anything else. Airaid filters make a big difference in power and milage. it is a fun ride, up high, safe, go anywhere.

Just bought this H3. Bought it for its weight (far better than the Colorado it is built on)and the full time 4WD. For the lead foots in your household--I have two, it keeps the car on the road, the tires off the curbs, and the back end from swerving into the opposing land. Still need more clearance for off roading. BUT IS IS CALLED A TACTICAL EDITION. WHAT DOES THAT MEAN? NO TOP LIGHTS, AND BACKED OUT WHEELS IS ALL I SEE, NO CHROME. ANY HELP?

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