Where do you find the computer in a 1992 Buick Regal Gran Sport?

There is no computer in the sense of a personal computer in a 1992 Buick Regal Gran Sport. Instead, it has an engine control module (ECM), also sometimes called a Powertrain Control Module (PCM), which is the car's onboard computer. This is located somewhere under the hood, usually near the firewall, but the exact location can vary slightly depending on the specific model and options. You'll likely need to consult a repair manual for that year and model to pinpoint its precise location.