My 2000 pontiac montana will start up then immediately die, if i give it gas to try and keep it running it sounds like it backfires through the fuel system

I smell a bad fuel pump.. Easiest way to check this is have someone turn the key but not actually start the car and you stand near the tank to listen for the humming sound a pump usually makes as it pressurizes the system. If you hear the humming sound then check the pumps PSI and see if it holds. Good luck