If you are short of cash, the Trailblazer is not so bad. As noted above, get the newest one you can afford.
Since they stopped making them 11 months ago, I guess you will be buying used.
Be sure to haggle really hard. These bigger SUV's are very difficult to sell these days, especially for dealers. So, even if they are asking a decent dollar, offer thousands less.... and stick to it!!
Even if you have to leave and come back the next day, stick to offering thousands less then what they are asking. Once a salesman thinks he can get nothing more from you, likely they will cut thousands off the price.... because these things are very, very difficult to sell these days.
Also, don't go for dealer financing. It's often a rip. Get a bank loan if you can.
I think the straight six engine is extremely good, very powerful, with decent mileage. The atomic V8 really is not a big plus in this truck.
Also, check out
www.carsurvey.org for lots of useful reviews.