where is the fuel pressure regulator on a 2007 grand prix

On the fuel rail. Look for a cylindrical thing with a vacuum hose connected to it. That'll be it. Hope that helps! Jim

Wrong answer there's nothing on the fuel rail. There's 2 sensors in the middle backside top of the motor on a bracket and they look like this

Besides the fact this thread is 4 months old, the part pictured is on the fuel pump assembly. It monitors pressure inside the fuel tank. The original question was about the fuel pressure regulator. Look that up and post a picture please. Thank you. Jim