Where is the fuel pressure regulator on a 1993 Chev silverado pu 3500 with 454 cubic inch engine?

On a 1993 Chevy Silverado 3500 with a 454 cubic inch engine, the fuel pressure regulator is typically integrated into the fuel rail. You won't find a separate, stand-alone regulator like on some older vehicles. The fuel rail is located on the intake manifold, near the throttle body.