What Are Some Common Hummer H3 Problems?

By Staff WriterLast Updated Apr 17, 2020 8:34:24 PM ET

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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