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Problems for specific Hummer H3 years:

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Most reported 2007 Hummer H3 problems


Verified for the Hummer H3

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

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Verified for the Hummer H3

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.

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Reported by garyj0nes and 2 others for the Hummer H3

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.

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