Hummer Repair and Maintenance

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

Repair Estimates

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$235 to $698
$462 to $1,251
$97 to $383
$184 to $369

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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.

One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.

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

See More Problems 19

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?

See More Questions 369

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 heated washer module under the hood could overheat due to excessive current draw. Under certain conditions, this could result in an under hood fire. This previous recall attempt in 2008 to repair this concern did not have the expected success. Dealers will now permanently disable and remove the heated washer module to correct this concern. This recall is expected to begin on June 20, 2010.

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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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

Three years since my last update, and still an AWESOME MACHINE. the MACHINE IS ALMOST NINE YEARS OLD and kicking ass...

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...

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