However, the exact location can vary slightly depending on the engine type (3.1L, 3.8L, etc.) and any aftermarket modifications. The best way to be absolutely certain is to consult your owner's manual. The manual will have a diagram showing the location of all fluid reservoirs, including the power steering fluid.
If you don't have the owner's manual, you can often find a digital version online through the Pontiac or General Motors websites. Searching online for "2001 Pontiac Grand Prix power steering fluid location" with your specific engine size might also yield helpful images or forum discussions.