Where is the location of computer on a 1999 Pontiac grand prix gtp?

The computer in a 1999 Pontiac Grand Prix GTP, more accurately called the Powertrain Control Module (PCM) or Engine Control Unit (ECU), is located under the dashboard, typically on the passenger side. However, its exact location can vary slightly depending on specific options and trim levels. You'll likely need to access it by removing some trim panels under the dash. A repair manual specific to your car's year and model would be the most accurate source for precise location details.