1994 GMC C2500 fuelpump running to long before shutting off

O.K......Was that all? this site is not called "the blind leading the blind" even though that's what it is, I am not a psychic, and I cannot be beamed to your location, or send you a replacement of a experimental subatomic unified energy impulse units to put in your vehicle, now let's try this again and and tell me why you think that your fuel pump is running excessively, take a stopwatch, and tell me how long it runs for, now where going somewhere. Hopefully not into outer space, let me know when you have what I've requested.