Where is the oil pressure sending unit located on a 2003 Cadillac CTS?

On a 2003 Cadillac CTS, the oil pressure sending unit is located on the engine block, near the oil filter. Specifically, it can be found on the driver's side, towards the rear of the engine, near the oil pan. To access it, you may need to remove some components for better visibility and reach. Always consult a repair manual or guide for detailed instructions if you plan to work on it.