2001 Chevy Blazer Blazer Dies

Engine Performance problem
2001 Chevy Blazer Four Wheel Drive Automatic 91675 miles

I have a 2001 chevy blazer that started stalling on me. The first time it was after I drove it 30 miles and came to a stop sign and it stalled. After a few minutes it started and I was able to get it to work. The next time was after 3 miles and it died, however I was again able to start it. The next time it died after running several errands in town and after stopping at a stop sign, it died again and I had to have it towed. That was all in 24 hours. I took it out to my repair shop and they ran it for 8 hours and could not get it to stall at all. They had it hooked up to a fuel pressure gauge and it never fell below 50 or close. They verified that it primed everytime they started and stopped it.
I just bought it from a dealer who had no idea it had any such related problems (which I take with a grain of salt). I have only been in possession of the car for 2 weeks, of which I didn't drive it one week.