Are you sure someone didn't borrow your gas? With the current price of gas, that becomes a real possibility. If there is not enough gas in the tank to cover the pickup, the pump can't pump it.

Electric fuel pumps tend to just die, most don't give any warning. Constantly running the vehicle low on fuel tends to hurry the failure a bit, as will any dirt or grit in the gas. Most electric pumps also have a "filter sock" (most are plastic these days) on the inlet side of the pump, that could be plugged up, or bad as well, a plugged, or partially plugged 'filter sock" will restrict or stop the fuel from getting into the pump. You might want to be sure the fuel lines from the tank are good as well. Don't over look the easy stuff. Gene