why do my all my gauges and radion cut off randomly while driving?

What is your question?

I have a 2005 GMC savana 3500 work van. sometime while i am driving all my gauge and speedometer and radion stop working randomly and will stop for a minute maybe 2 and then come back on. i cant seem to get an answer why?i drove 5 mile and it did it twice just today 7/10/2014.it just started 3 days ago.