My parents bought a 2006 4WD LS Trailblazer from a used car lot in 2007/2008 with about 20K-30K miles on it. We have since owned the vehicle since 2010. This SUV was the first one I've ever owned. It took a little getting used to the low gas mileage, but living in Pennsylvania with sometimes heavy snow and icy conditions, it was great having a vehicle with 4WD and good ground clearance. This vehicle will hit 200,000 miles within the next month and I hope to keep the vehicle for at least another 20K miles (unless some costly major repair is needed). The vehicle is on its 3rd or 4th set of tires, I replaced the engine belt at 187K miles, I've replaced the front struts, all 4 rotors recently, and the belt tensioner twice ($15 part). The O2 sensor has been replaced once and I am online now ordering a thermostat for the engine (and a rear tail-light, my wife backed into a car yesterday while out shopping). The Inline 6 engine is highly rated and I've never had any issue with it. The rear struts need to be replaced, but it still passes state inspection and each time the mechanics mention how great of condition this vehicle is in. My only complaints with this vehicle are that the interior is cheap looking on our LS model. The dash is cheap feeling hard plastic and the rear speakers have been out for over a year. Overall I love this vehicle and would consider buying another even though they are pretty old. There is a fantastic website forum called TrailVoy.com with tons of discussions for any problem you could have with this vehicle and helpful tips on DIY fixes, or advice on paying for repairs.
I have had this truck since 07. I bought it for myself as a birthday gift. It sits at 198,000 miles and it runs like I just drove it off the lot. I keep up the necessary maintanace on it. I have been threw a few battiers, much to my own fault for having my system hooked up to it. A fuel tank sensor (recalled so I got my money back), tires, water pump two times, an altanator, rear hatch shocks, and some front end stuff (struts, control arms, bearings, etc. ) I love this truck and I wouldn't trade it for anything else. I'm not looking forward to the day I have to replace it...
We had a fuel sensor issue with the Trailblazer. The gas gague always read empty when the sensor went out. There is a "hidden assistance recall" that GM has that you have to go thru a dealer. We were quoted $340 just to replace the sensor and not the pump. We found the sensor on e-bay for $25.00 and did it ourselves.
The TrailBlazer is a good alternative to a crew cab pickup truck. It is a solid off roader, good tow vehicle, and can be had at a good price. The locking differential is a must for any towing or off roading, as is the skidplate. The TrailBlazer doesn't drive as good as a Highlander or Pilot, but they can't tow what a TrailBlazer can. Nor can they match its truck-like capability. The roof rack is functional and sturdy, and holds my kayak and supplies (300 lbs) easily. Mileage is decent (22ish highway, 17 around town). If you worry about fuel, then buy a crossover. The tight turning circle really makes it easier to park than my Mazda 6. Bargain hard!
This is my second Trailblazer. First one was 2003. Kept the 2003 for about 4 years and 90,000+ miles. I bought the 2006 in 2009 with about 30,000 miles on it. It now has 115,000 miles. Love its power and appearance. Gas mileage is acceptable with about 15-17 city and 20 -22 on the highway. Only problems with it other than maintenance was the fuel sensor, which I had to replace and belt tensioner ($20.00). I have replaced the brakes twice. Tires replaced once. Used it to pull 4,000 lb trailer for a while. It did it, but it wasn't happy. With a 3,000 lb trailer it drives much better, but hwy mileage sank to about 13-14 mpg. When this one wears out I will look for another one.