have you bled the system...could be trapped air, or even a bad pump
bearing down in pump. djones1 Buick dealership
If it is loud (louder than other GM cars of the same era with fuel injection) I'd suggest you get it replace BEFORE you are stranded. Running out of fuel damages the fuel pump. They all do make some noise, but the noise is not "loud" Sometimes the baffels in the tank break and pieces of the baffels lodge in the fuel pump.
a humming noise is usually related to the fuel pump about to go. or u just have a really loud fuel pump and everything is fine.
It sounds like a loud bearing going out in a pump. The noise comes from the engine department.
bearing down in pump. djones1 buick dealership
There is a loud squeak noise and it is hard to turn your car.
My fuel pump is very loud. I'm told it is aftermarket but it is fine.
Fuel pump?
Start by replacing the filter. You will still probably have a weak fuel pump that will need replaced.
Activation.
A bad bearing in the water pump could be one possibility.