Where is the PCV valve located on a 1992 Pontiac Grand Prix LE?

If your engine is a 3.1L V6 and it sits horizontally in your engine bay (as in 3 spark plugs in front and 3 behind the block next to the firewall) then the valve should be located above the exhaust manifold that's in front of the firewall. it's inside a little tube and it should have written on the tube; "PCV".