Thermostat, water pump at 90,000.
A couple of exterior door handles (kids).
Shifter cable was replaced at 80,000.
Replaced rear air springs with regular springs at 100,000.
Cataletyc converter 115,000
All repairs done myself except shifter cable.
A Trailblazer under the skin, but nicer interior and plenty of room.
Very well built and solid, with good power and a smooth ride to go with it.
We took several very long trips, and no complaints.
The repairs listed above are typical on any vehicle.
I have heard about fan clutch issues and "weak front suspensions" on this platform, but never experienced it, nor any of the 3 people I know who had Trailblazers. The rear air springs sprung a leak, but the after market regular replacement is cheaper and made no difference to the ride.
GM should still offer a midsize full framed SUV. In my opinion this family of SUVs were pretty good, and better than the Blazer and Jimmy SUVs prior to these.