You have 2 choices. You can remove the fuel tank, or you can unbolt the bed and move it back far enough to access the pump.
in the fuel tank
It is inside the fuel tank.
Mounted on top and inside the fuel tank.
How do I change the side/parkinglight on a bmw 530d 04 reg Do I have to take the cluster out?
The fuel filter is in the gas tank on the end of the fuel pump.
It is part of the fuel pump module in the tank.
Sounds like a clooged filter or a weak fuel pump. Replace the Fuel Filter. Install a fuel pressure gauge on the fuel rail and check it under load. If the pressure drops even a little the fuel pump is bad.
Unfortunately, it's located inside the fuel tank. FriPilot
If it is coming from the rear of the car it is probably the fuel pump. Can be the fuel filter is partially clogged and it is working hard to pump the fuel. replace the fuel filter. Can be tire noise caused by a defect in the tire. Can be a defective wheel bearing. You need to isolate the hum. Or it could just be that your '04 Impala is happy.
When it starts leaking are making noise.
Maybe fuel pump or dirty injectors