It is in the gas tank.
Mounted on top and inside the fuel tank.
Chevrolet does not use inertia/reset switches.
fuel pump might be going out
in the fuel tank
I have been told every 40,000 miles to protect the fuel pump located in the fuel cell.
An electric pump mounted in the fuel tank.
In the fuel tank
The fuel pump relay switch on a 2001 Chevy Impala is located in the engine compartment fuse box. You can find the fuse box near the driver's side of the engine bay. The specific position of the fuel pump relay can be identified in the diagram on the cover of the fuse box. If you need to replace it, consult the vehicle's manual for detailed instructions.
It has a electric pump inside of the fuel tank.
In the fuel tank...
Depends on where you live. In my area it would be around $300.
To change the fuel pump in a 2005 Impala one will need a fuel pump kit, socket wrench set, and a torque wrench. The gas will need to be drained from the tank and the battery will need to be disabled from the engine. The fuel pump is located inside of the fuel tank.