Hummer H3 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Hummer H3


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Hummer H3
$462 to $782
Hummer H3
$200 to $383
Hummer H3
$184 to $369
Hummer H3
$386 to $724
Hummer H3
$235 to $501

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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.

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

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.

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I've heard of a key problem with these cars. Any ideas?

My hummer leaks under the pedals and rains out the onstar speaker. Everytime it rains, Im left with a mess! I do have a sunroof , checking the seal on that. Can't find a number of a hummer dealer ship to replace anything. .......

The Engine wiring harnesses are not the same. Is there a wiring conversion kit or any suggestions?

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The connector module that controls the blower motor speed for the heating, ventilation and air conditioning system may overheat, causing a fire hazard. Dealers will replace part of the blower motor connector and harness free of charge to resolve the concern.

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.

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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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

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 stil...

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-...

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