The power steering fluid reservoir on a 1993 Chevy Caprice is typically located
on the driver's side of the engine compartment, near the firewall. It's usually a plastic reservoir with a cap that may be marked with a power steering symbol (a steering wheel often with a circle and arrows). Look for a container that appears to be specifically for fluid, with lines running to and from it.
However, it's crucial to check your owner's manual. The exact location might vary slightly depending on the specific model and trim level of your 1993 Caprice. The owner's manual will have diagrams and precise instructions.