Try’s to start but dies????

[kennyhammond]

2002 Silverado 5.3L vortec. Fires up then dies flat. Changed fuel filter when it done this before and ran good. So thought that was it. Drive it for about 3 mo this and done it agian. Now I checked fuel pressure and key on pump running but not engine. Fuel rail has 50 or so lbs. so I ordered a new pump waiting on it. But wanted to reach out and see if there is other things I need to check. I think the pump should be putting out at least 60 at dead moto right