Location oil sending unit 5.3 V 8 Chevy 2006?

The oil pressure sending unit on a 2006 Chevy 5.3L V8 is located on the passenger side of the engine block, near the front. It's usually a relatively small unit with one or two wires connected to it. It's often positioned fairly low on the block.

However, the exact location can vary slightly depending on the specific engine configuration and year. A visual inspection of your engine bay is recommended. A repair manual specific to your vehicle's year and model would be the most definitive resource for pinpointing its location. You can often find these manuals online or at auto parts stores.