Where is the oil sending unit on a 2007 Chevrolet 3.5 v6?

The oil pressure sending unit on a 2007 Chevrolet 3.5L V6 is located on the passenger side of the engine block, near the oil filter. It's a relatively small unit and often difficult to see without removing some components, like the oil filter or potentially the air intake system, depending on the exact configuration. You'll likely need a wrench or socket to access it.