Where is the PCV valve located on a 1998 Pontiac 38 engine 3800 series?

On a 1998 Pontiac 3800 Series II engine (the 3800 designation usually implies this series), the PCV valve is typically located on the valve cover, near the rear of the engine. It's often a small, round valve with a hose attached to it.

However, precise location can vary slightly depending on the specific engine configuration and modifications. The best way to be absolutely certain is to:

1. Consult your vehicle's repair manual: This will have diagrams and clear instructions.

2. Use a parts diagram online: Many online auto parts stores (like AutoZone, Advance Auto Parts, etc.) have searchable parts diagrams for your specific year, make, and model. Searching for "1998 Pontiac Grand Prix 3800 PCV valve" (or whatever the specific model of your car is) should bring up such a diagram.

Visually inspecting the valve cover area, looking for a small, round valve with a hose connected, will also help you locate it. The hose will generally lead to the intake manifold.