To be certain, you should:
1. Consult your owner's manual: This is the most reliable source for the location specific to your vehicle's engine.
2. Look at a diagram: Search online for "1995 Chevy Corsica [engine size] PCV valve location" A diagram showing the engine components will help you locate it.
3. Visually inspect the valve cover: The PCV valve is usually easily identifiable as a small, often black plastic cap with a hose going to the intake manifold.
Keep in mind that the hose connected to the PCV valve is another important visual clue. Trace that hose and it should lead you to the valve.