IMO trailblazers are junk. they are made cheaply, they have the worst engine bay setup (try changing the oil and you'll start to understand why) do a thermostat in the straight 6 style motor PITA! they all ride like crap (way top heavy) Sway bar links are junk and a pain to replace, they love the tear up clamps on the cv boots (more so on the pass side for some reason) some have a fair share of cluster (gauges) problems, trans coolers get plugged (and its internal of the radiator, and that is a whole nother PITA to remove ((remove grill, stupid design, remove shroud that is incredible complicated stupid design, remove fan clutch very stupid limited space.... etc.)) etc. etc.
I also had to replace the Y pipe from exhaust manifolds to muffler pipe.... wow if that wasnt stupid all the stuff that had to be removed just to drop the exhaust Y
They are also picky about clean tcase fluid.... lots of bad things happen quick when fluid is not kept clean, way more so than on anything else I have ever seen.
This is all just personal opinion/experience, but I hate em.