Where is the AC air filter on a 1993 Chevy Lumina?

The AC air filter on a 1993 Chevy Lumina is located under the passenger side of the dashboard. You'll likely need to remove the glove box (or at least part of it) to access it. There's no single, universally easy-to-find diagram for its precise location, as access varies slightly depending on trim level. However, searching YouTube for "1993 Chevy Lumina cabin air filter replacement" will likely show you videos demonstrating the process and the filter's location visually.