Where is the EGR valve located on a 1990 Buick Riviera?

The EGR (Exhaust Gas Recirculation) valve on a 1990 Buick Riviera is typically located on the engine's intake manifold. It is usually positioned near the back of the engine, close to the throttle body. To access it, you may need to remove some components for better visibility and reach. Always refer to a repair manual for specific details and diagrams for your vehicle model.