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2008 Hummer H3 Problems

 

Engine Misfire Due to Worn Valve Seat

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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Check Engine Light Due to Gas Cap Issue

Verified for the Hummer H3

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

18 Reports
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Erratic Fuel Gauge Operation

Verified for the Hummer H3

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.

5 Reports
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