Positive Crankcase Ventilation
WARNING: This page is about a different car, the 2003 Cadillac Seville and 2003 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
The crankcase ventilation system uses a Positive Crankcase Ventilation (PCV) orifice tube. The PCV orifice tube is located in rear valve cover. Service information is not available from manufacturer.