yes
In the fuel tank
An electric pump mounted in the fuel tank.
very carefully
It is in the gas tank.
none
No, you must drop the fuel tank to access the fuel pump.
There is not a reset switch.jd
An Inertia Switch is strictly a Ford thing, my friend. Your Impala uses a fuel pump relay that's activated by the PCM to control fuel pump output.
Chevrolet does not use a "reset" button for the fuel pump on their vehicles. That is a Ford thing.
No, the 2000 Impala does not have an inertia switch for the fuel pump. Inertia switches are typically found in vehicles with a high center of gravity, like trucks and SUVs, to shut off the fuel pump in the event of a collision. In most cases, the fuel pump in a 2000 Impala is controlled by the vehicle's powertrain control module (PCM) and fuel pump relay.
You will have to drop the fuel tank to access the fuel module. It is not a job to do on the ground.
Could be a clogged fuel filter, a failing fuel pump, or an intermittent fuel pump relay.