One problem related to engine shut off without warning has been reported for the 2004 Chevrolet Trailblazer. The most recently reported issues are listed below.
Many times while driving this SUV, the engine has just shut off. It will start right back up. However it is scary and we have tried to figure this out for quite some time now. The worst time was when I was getting on a busy interstate and the car cut off. I don't know if the vehicle was doing this prior to our purchase. I can not get any information from carmax in regard to this. It is well maintained and due to this, I rarely take it out on the road anymore.