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. Probably because it's so old, no one bothers to post complaints anymore.

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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