One problem related to radiator has been reported for the 2005 Chevrolet Trailblazer. The most recently reported issues are listed below.
All of a sudden the transmission started to shift funny after a long road trip. It did this once on the highway. We got off the highway and pulled into our town and the car was having problems shifting. We barely made it to our house and the transmission was leaking. We went to drive it to the dealership and it over heated less than a mile from the house. We were told that the radiator deteriorated and sent anti-freeze into the transmission which destroyed the transmission.