The power steering fluid reservoir on a 1997 Cadillac DeVille is located
on the driver's side of the engine compartment, near the firewall. It's usually a plastic reservoir with a cap that's clearly marked "Power Steering Fluid." It might be somewhat cylindrical or rectangular in shape.
While the general location is consistent, a quick visual inspection of your engine bay is the best way to pinpoint it precisely. Look for a reservoir that matches the description and has a dipstick or markings indicating fluid level.
