To find it definitively:
1. Consult a Repair Manual: A repair manual specific to your vehicle's year and engine is your best bet. It will have diagrams and pinpoint the location.
2. Use an Online Parts Diagram: Many online auto parts stores (like AutoZone, Advance Auto Parts, etc.) have searchable parts diagrams. Enter your vehicle's information, and you should be able to find a diagram showing the EGR valve's location.
3. Visual Inspection (with caution): Once the engine is cool, carefully inspect the intake manifold area. Look for a valve with vacuum lines connected to it, and it's likely the EGR. Be cautious near hot components and moving parts.
Remember, working on your vehicle's engine can be dangerous. If you are not comfortable with this type of repair, it's best to take it to a qualified mechanic.