Open the fuel filler door and remove the gas cap, put your ear to the filler neck and have someone turn the ignition key to the on position. If the Fuel pump is operating you should hear it buzz or hum for about 3 or 4 seconds. If you hear it buzz or hum it is working. But it does not tell you if you have the required fuel pressure to start the vehicle. A fuel pressure gauge attached to the service fitting on the fuel rail will give a fuel pressure reading. I left Chevrolet in 1998 but I believe the fuel pressure should be around 45 to 65 psi.
check under the driver's side, on the fuel line, somewhere near the tank.
in the fuel tank
what year?
drop the tank and take the old pump out then put the new one in
yes it is fuel injected.
There is no fuel pump shut off switch on a Pontiac Firebird. Instead, it has a fuel pump relay under the hood in the power distribution box.
15.5 gallons
Yes
The fuel pump in any car is tricky, using its diagram can make the repairs easier. The diagram for a 1995 Pontiac Firebird fuel pump can be found in its maintenance manual.
In the fuel tank
In the fuel tank, integral to fuel pump.
A mechanic, that's who.