The power steering fluid reservoir on a 2006 Chevrolet Malibu is typically located
under the hood, on the driver's side (left side when facing the engine), near the firewall. It's often a small, clear or translucent reservoir with markings indicating the minimum and maximum fluid levels. It might have a cap with a power steering symbol on it.
However, the exact location can vary slightly depending on the specific engine and trim level. It's best to consult your owner's manual for a precise diagram and location.