Chevrolet Express Tank

Hello, I Have This Problem With My Van: When I Start The Van It Works Perfectly, After 10 Minutes Approximately, When I Step The Gas...

I Noticed The Van Started To Hesitate After Getting A Little Under Half Tank Of Gas. A Couple Of Times It Has Completely Shut Off. I Can...

Filled The Gas Tank Then Got A Lot Of Bucking And Back Fireing In The Exaust Till I Drove It 60 Miles.now It Seems Ok Whats Up?

Van Stops Getting Gas While Driving. Turns Over Well. Checked Pump And It's Working. Electrical? Oh, And Yes The Tank Has Plenty Of Gas...