Our 2500 passenger van is shutting off while driving and will not crank immedist

What is your question?

It has quit numerous times and left us stranded. But may crank again in an hour or may be overnight. It has only 29,000 miles

What makes this problem better or worse?

It seems that it is after warming up

How long has your 2011 Chevrolet Express 2500 had this problem?

4 weeks