1997 Chevy Astro Won't Start?

The Van was running fine when I parked it last Friday(a week ago). I went out to start it today and it would not start. I didn't hear the sound of the electric fuel pump when I turned on the ignition. I haven't had a problem in the past. I think it's the fuel pump. It has 3/4 of tank of fuel. It's not out of Gas.