One problem related to starter has been reported for the 2008 Chevrolet Trailblazer. The most recently reported issues are listed below.
Traveling at 55 mph on a freeway, engine stopped with no notice. Since the engine stopped, brakes and steering experienced greatly reduced capability. I had to struggle to get the vehicle on to the shoulder in order to avoid an accident. Once stopped, I got no response of any kind from the starter, although I had power to the blower motor, radio, and power windows. After 5 minutes, I was able to get the car started. I turned around to drive home, and 5 minutes later the problem recurred exactly as described above. The vehicle is now in the shop for repair as it is not safe to drive. I presume that I am dealing with a catastrophic ignition system failure of the type that caused gm to issue it's massive recall 5-6 years ago.