The EGR valve on a 2002 Dodge 3500 van with a 5.9L engine is located on the intake manifold, usually on the passenger side (right side) of the engine. It's relatively close to the back of the engine, but the exact position can vary slightly depending on the specific configuration of your van's engine bay. You'll likely see a vacuum line connected to it, and it's a relatively small, rectangular-shaped component.
To be certain, I strongly recommend visually inspecting the engine compartment. A repair manual specific to your year and model will have a diagram showing the precise location. You can often find these manuals online or at auto parts stores.
