is there a to raise the fuel line preassure or is it just a new fuel pump needed on 1998 Pontiac Bonneville

Car died when shut off. wasn't getting fuel, replaced fuel pump & sock,still didnt run mech said the new fuel pump was defective, replaced it again still wont workwont run

Asked by for the 1998 Pontiac Bonneville
Verify fuel pressure or lack of with a fuel pressure tester. Then verify injector pulse with a noid light.