Where is the EGR Valve on a 1989 Pontiac Firebird with a 6 cylinder motor?
I'm not positive on '89s but on '90s (I'm almost positive they're the same engine) its on the passenger's side. You should be able to see it by opening the hood. Its right next to the intake plenum/manifold and it has a pipe that connects just behind the throttle body. Hope that helps!