Fuel pump sounds like its stuck on hear that constant buzzing?

Under the left side of your back seat is a fuse / relay box . When you first turn the key on the fuel pump relay turns on for a few seconds to prime the fuel system . That relay is in that fuse / relay box ,that is what your hearing . Does the vehicle start an run good , no problems other then the buzzing sound .The vehicle battery is also under the rear seat on the right side . How To Locate and disconnect Battery Buick Lesabre Pontiac Bonneville 00...

Hi Marc-
The sound you are hearing MAY be the electric fuel pump in the tank that is supplying gasoline to the motor.
It should not be making a noise when normal, but may be needing replacement shortly.
Hope this helps!

some fuel pumps will run like this for years other are short lived

If it has a fuel pump relay check that first. if the relay is good your fuel pump is probably on the fritz.(bad).

So do you know if you have gas in your tank or not? You need to check for fuel pressure to make sure your pump is working. Inside you fuel tank is a fuel pump module which consists of your fuel pump and fuel level sender. It sounds like you are going to need to replace that. Can you hear your fuel pump buzzing. Open you gas filler cap and put your ear next to it while having a helper turn the key to the run position not start position. You should hear it run for about 5-10 seconds and then shut off. If you don't hear it you have a problem with your pump. It can be with the wiring, feul pump relay, or the pump itself. It is usually the pump. But even if you can hear the pump you still need to check your fuel pressure as the pump may be buzzing but not working correctly. Also check your fuel filter.

When you turn the key to the "run" position, listen and see if you can hear a buzzing noise coming from the under the bed. This is your fuel pump buzzing for 2-3 seconds. If it isnt buzzing, you most likely have a faulty fuel pump. If it does buzz, check the fuel pressure. There is a schrader valve on the fuel line under the hood near the back of the intake manifold. You will need a fuel pressure gauge to check the pressure. If it doesnt build 50-60 psi, it will most likely, again, need a fuel pump.

most of fuel pumps were in tank, wire corrodes is harness under right front seat floor pan to tank
if fuel pump buzz is heard and car runs and when it doesnt run you cant hear the fuel pump try
turn ignition off wait 10 seconds
turn ignition to on position to (prime or hear pump buzz)
no buzz fuel pump not working check fuel pump relay(swap with another) and try again?
you could use test light to pump wiring and make sure your getting power to pump on this prime test no power relay or wiring problem.
power at pump, but no buzz fuel pump faulty

Check for Fuel Pressure @ Test Port if it Does not SPRAY Fuel Pump is Bad

if u could hear the much noise from the pump it was failing, so yes u will need a new fuel pump, but 1st check the fuel pressure to confirm this, they are not cheap.

turn the ignition to the ON position and check to see if you can hear the fuel pump making a buzzing sound. if it doesnt make a buzzing sound, the the fuel pump isnt working. if the fuel pump sint working, then check the fuse in the fuse box under the hood.