How do you replace fuel pressure regulator on 1999 Pontiac Firebird?

To replace the fuel pressure regulator on a 1999 Pontiac Firebird, first, relieve the fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls. Disconnect the battery, then remove the intake manifold or the necessary components to access the regulator. Unplug the electrical connector and fuel lines from the regulator, then remove it from the fuel rail. Install the new regulator, reconnect the fuel lines and electrical connector, and reassemble any components you removed before reattaching the battery and testing the system for leaks.