The trailblazer is one of the lowest rated SUV's. As other people said it has a solid engine, but is otherwise not very good.
I assume you and your girlfriend don't have any kids, so then why something so big and heavy. Something the size of an Escape or Vue (if she likes GM) will get you better gas mileage and is more practical in nearly every other aspect. With the exception of maybe .001% of the population truck based SUVs are serious overkill.
