To find it, you'll need to:
1. Locate the valve cover: This is the top of the engine, a relatively large, rectangular-shaped part.
2. Look for hoses: The PCV valve will have at least one hose connected to it, usually a small diameter hose. Follow these hoses to find the valve.
3. Consult a repair manual: A repair manual specific to your 1999 Chrysler Sebring V6 (3.0L) will have a diagram showing the exact location of the PCV valve. This is the most reliable way to find it.
Important Note: Before attempting to locate or replace the PCV valve, make sure the engine is completely cool to avoid burns.