Where is the computer located on a 1990 Chevrolet Lumina?

In a 1990 Chevrolet Lumina, the engine control module (ECM), which is the vehicle's computer, is typically located under the dashboard on the driver's side. It is often mounted on or near the firewall, making it accessible for diagnostics and repair. To reach it, you may need to remove some trim panels or access it from underneath the dashboard.