3800 exploded view

I have a 94 bonneville and found a metal pipe from the exhaust manifold to be pinched closed. Its seems to go into some sort of pump or pressure system? It then shoots into the throttle body. I am assuming this measuring the air fuel mixture and correcting the motor. I have no idea what the part is. I was wondering if anyone has a exploded view of this motor so I could possibley get a part # or some sort of name for the part to find it either on the internet or from the dealership.

EGR tube