Hi all, 06 silverado 5.3 crew cab just installed a new delphi fg0392 fuel pump because the last one rotted and was leaking. Got the new one in and it's making a loud hissing noise.. It doesn't sound bad in the videos but it's pretty loud in person and noticeable. Should I go with a different pump before I re attach the bed? Or is this a normal sound? Fuel pressure is 55psi at key on and doesn't drop. Sits at 60psi idling. Any help appreciated video links are below

https://youtube.com/shorts/vrfCzDCGacE?si=DtjKymGHayMQr9Fa

https://youtube.com/shorts/2HgcKEYcWkI?si=lEdAkXfTVQyme4BQ

 

Maybe it sounds louder because the bed is off?

 

that's what I thought too but I lowered the bed back on and you can hear it clearly when walking around the back of the truck. Sounds like a loud hissing noise similar to a hose nozzle that isn't screwed on all the way