What Are Some Common Hummer H3 Problems?


Quick Answer

Some common problems reported by owners of the 2006 Hummer H3 include engine problems such as leaking valves, cylinder head failure and a tendency to run rough. Common electrical problems reported for this make and model include a faulty passlock light that prevents the vehicle from starting.

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Full Answer

The most common solutions for leaking valves in a 2006 Hummer H3 is replacing the valves. In some cases, owners had to replace the entire cylinder head. This issue typically occurs around the 80,000 mile mark and costs about $2,500 to repair as of 2015.

The faulty passlock light, which is due to a weak ignition switch, is part of the H3's anti-theft system. This system automatically resets every 10 minutes, at which point it is drivable again.

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