On a 1992 Chevy G20 van, the fuel pressure regulator is typically
integrated into the fuel rail. This means it's not a separate component you'll find hanging off a fuel line; it's part of the fuel rail assembly itself. You'll find the fuel rail on the top of the engine, running along the intake manifold. The regulator is usually located at one end of the fuel rail, often near the intake manifold.
To be absolutely certain, consult a repair manual specific to your 1992 Chevy G20's engine (e.g., a 4.3L V6 or a larger V8). The manual will have diagrams showing the exact location and will help you avoid accidentally damaging other components.
