Where is egr valve located 0n 4.3 Chevrolet engine?

The EGR valve location on a 4.3L Chevrolet engine (specifically the Vortec variation, as they were the most common) varies slightly depending on the year and exact engine configuration. However, it's generally found on the intake manifold, either on the passenger side or rear of the manifold.

To be absolutely certain, you should:

* Consult a repair manual: A Haynes or Chilton manual specific to your vehicle's year and model will show you exactly where it is located.

* Use a parts diagram: Online auto parts stores (like AutoZone, Advance Auto Parts, etc.) allow you to look up parts diagrams for your specific engine. Searching for "4.3L Vortec EGR valve" will usually bring up the right diagram.

* Visually inspect the engine: Look carefully at the intake manifold; the EGR valve is usually a relatively small, rectangular or cylindrical component with vacuum lines connected to it. It might have a noticeable electrical connector as well.

Without knowing the exact year and model of your Chevrolet vehicle, a more precise location can't be given. The above methods will provide the most accurate information.