The pump is in the tank and the regulator is near the throttle body in the rail. GM has had many fuel pump problems with your model so I would suggest you focus on the fuel pump. I hope this helps you.
New answer; He's right on the pump. But the regulator is mounted on the throttle
body behind the injecters up on top.
It is located in the throttle body.
the regulator is located in the throttle housing (where the fuel lines connect)
oil filter housing
if its a full size pickup, with a v8, the fuel pressure regulator is in the tank, its part of the sending unit
In the alternator
i need to find where they hide the horn on my 2006 Chevrolet half ton pickup.
It is inside the alternator.
It will be mounted behind the battery where the head lights are. It could be on the fender where the battery is.
38-44 psi with pressure regulator vacuum hose disconnected and plugged
That vehicle has a mechanical fuel pump and a carburetor. The fuel pump has a built in regulator and is not serviceable.
Fuel Pressure Regulator is located on the fuel rail.Fuel Pressure Regulator1. Disconnect the negative battery cable.2. Properly relieve the fuel system pressure.3. Remove the air cleaner outlet tube(s).4. Remove any necessary components to access the pressure regulator.5. Disconnect the vacuum hose from the pressure regulator.6. Remove the pressure regulator attaching screws.7. Remove the pressure regulator from the fuel rail.To Install8. Discard the O-rings on the pressure regulator and replace them with new ones.9. Lubricate the O-rings with clean engine oil.10. Install the regulator into the fuel rail and tighten the retaining screws.11. Connect the vacuum hose to the regulator.12. Install any components removed to access the regulator.13. Install the air cleaner outlet tube(s).14. Connect the negative battery cable.
Under the upper intake manifold (Engine code W). Once the cover is off. You'll see the fuel meter body (fuel injector lines) and regulator connected to it.