You must drop the fuel tank.
If its like the 1993 Lumina it's in the fuel tank.
Remove fuel tank for access
Drop fuel tank
Haynes Repair Manual covering 1995-2001 Chevrolet Lumina, Monte Carlo and Impala (FWD) page 1-22 says the fuel filter is "mounted to the floor pan just in front of the fuel tank".
NoNo
No , there is not
Inside the tank.
in your fuel tank
You will have to remove the gas tank and install a fuel module.
"Where is the fuel filter located on a 2001 Chevrolet Malibu?"
in gas tank
It is mounted on top and inside the fuel tank.