Where is the egr valve located on a 2004 Chevy silverado 1500 with 4.3 engine?

On a 2004 Chevy Silverado 1500 with the 4.3L engine, the EGR valve is typically located on the passenger side of the intake manifold. It's usually fairly close to the back of the engine, but its exact position might vary slightly depending on specific configurations. You'll likely need to consult a repair manual or look up diagrams specific to your year and engine for a precise location. A visual inspection with the engine bay somewhat clear will help significantly.