Where is the power steering pump on a buick lucerne?

The power steering pump on a Buick Lucerne is located on the front of the engine, driven by a belt. It's usually fairly close to the crankshaft pulley and alternator. However, the exact location can vary slightly depending on the engine type (3.8L V6 or 3.6L V6).

To be completely certain, you should consult your owner's manual or a repair manual specific to your Lucerne's year and engine. A diagram would be very helpful. Looking at a picture online of the engine bay of a similar year and model Lucerne might also help you identify it visually.