My mom has an 02 Trailblazer with about 90k on it. Bought it new in late 2001. Great truck, no issues. It is in need of some suspension work, it is a bit noisy in the front.
Very reliable, and a solid overall truck. Make sure you drop the spare tire once or twice a year or it will seize up and require replacement.
Only issues were an o2 sensor, and the spare tire drop mechanism in 7 years.