2000 Chevy Blazer 2000 Chevy Blazer engine turns off.

My 2000 Blazer engine turns off randomly when I am driving. It has happened while idling at stop lights, and while driving 65 on the interstate.

There is no engine noise, no slobbering, no sputtering. It just turns off. Most of the time I can restart it, sometimes it has to sit for awhile before it will restart. The check engine light does not come on, just the battery light after it is dead.

When the problem was starting it felt like the engine would lose power then kick back on (hesitating?). It did this for about 200 miles, then it started dying.

The truck had it's fuse box replaced about a year ago, and a new fuel pump about 12, 00 miles ago.

I've had it to two repair shops and a Chevy dealership. All say that the computer is not returning any codes to give them a clue what is up. The Chevy dealership tested the fuel pump, and an air sensor--said they were good. Finally they replaced the ignition system, and the truck ran great for 1 month (about 1,500 miles).

Then it abruptly started the same thing all over again. I'm taking it back in this week, and don't want to throw more good money at this thing if it's not going to get fixed.

Any help appreciated, thanks.