The 1999 Cadillac Catera's power steering fluid reservoir is typically located
under the hood, on the passenger side (right side) of the engine compartment. It's often a small, clear or translucent reservoir with markings indicating the minimum and maximum fill levels. Look for a reservoir with a cap that might be labeled "Power Steering Fluid" or have a steering wheel symbol on it.
However, the exact location can vary slightly depending on options and specific vehicle build. If you're having trouble locating it, consult your owner's manual. A picture in the manual will be the most definitive way to find it.
