Truck randomly quits while driving. Are there any common causes for this?

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Over the past year or so the truck, while driving at no particular speed, will quit running. All power stays on, the engine just quits. After coasting to a stop and turning off then back on, it will start right back up. It may not do this again for a week or two. The times when it happens seems completely random and does not seem to have regard for speed, turning or straight, cruise on or off, etc. I have had it to my local dealer twice and they cannot find the source of the problem. There is no check engine light associated with this problem so I assume there are no trouble codes being set.