Where is ther fuel pressure regulator located on a 1999 Buick park avenue ultra?

On a 1999 Buick Park Avenue Ultra, the fuel pressure regulator is integrated into the fuel rail assembly, which is located on the engine. To access it, you typically need to remove the engine cover and possibly other components to reach the fuel rail. The regulator is usually on the end of the fuel rail, connected to the fuel lines. If you're working on this, ensure to relieve the fuel pressure before disassembly for safety.