Where is the pcv valve on an 88 Chevrolet caprice classic?
It should be on top of the valve cover on the driver side right where you add oil. The oil cap is at the end of the valve cover towards the back of the engine and the pcv valve is on the same valve cover but towards the front of the engine. It sticks out of the valve cover just like the the oil cap does. I have the exact same year and model car as you and that's where mine is located at.