Vent to charcoal canister?
The fuel pressure regulator is located right on on the fuel rail, it has a vacuum line at one end and a fuel return line.
Follow fuel line from fuel tank
You can find a 2000 Chevy fuel line diagram in the owner's manual. You can also find it at select auto part stores.
Follow the fuel line from the top of the engine back to the firewall. The fuel line will go to the top of the fuel filter on the firewall.
There are 2 fuel lines. One is a pressure line to the injectors and the other is a return to the tank.
If the fuel is making it through the fuel filter but not to the fuel rail then I would check for problems in the fuel line, such as a clog or crimp in the metal line or perhaps a problem in a flexible line.
There is a special adapter that is needed, you remove the fuel line to the fuel rail, install the special adapter and then install the fuel pressure gauge to the adapter and reinstall the fuel line to the adapter.
Look under the vehicle - follow fuel line from the fuel tank
Probably under vehicle-follow fuel line from tank
Yes ( it's fuel injected )
It doesn't have a vacuum line attached to the fuel pressure regulator.
Drain the fuel from your 2000 Chevy Malibu fuel tank. Remove the fuel line. Remove the fuel filter retaining plate. Reverse the process to install the new fuel filter.