The power steering fluid reservoir on a 2006 Chevy Cobalt is typically located
under the hood, near the firewall, on the driver's side. It's usually a small, clear or translucent plastic reservoir with markings indicating the minimum and maximum fill lines. Look for a cap that says "Power Steering Fluid" or has a similar marking.
However, it's best to consult your owner's manual. This will provide the most accurate location and instructions specific to your vehicle. The location might vary slightly depending on the engine and trim level.
