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Ratings on over 1,000 new & used models going back 5 years, from the Center from Auto Safety. Learn more about The Car Book 2018 here.

Hummer H3T

Model Year Comparison

Worst Model Year
2009
Worst Category
cooling system Problems

We don't have a lot of complaints on file for the Hummer H3T — feel free to add yours here. It's either not very popular ... or it's very, very good.

The 2009 Hummer H3T has the most overall complaints, & we also rate 2009 as the worst model year ranked on several factors such as repair cost & average mileage when problems occur. The most-reported problem is also with the 2009 Hummer H3T for transmission fluid mixing with engine coolant.

Click on the graph bars for more details about a specific model year.

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Worst Hummer H3T Problems

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