Where is a oil pressure sending unit located on 2003 Cadillac deville?
The oil pressure sending unit on a 2003 Cadillac DeVille is located on the passenger side of the engine block, near the oil filter. It's usually a small, cylindrical device with one or two wires connected to it. You'll likely need to look closely and possibly use a flashlight to see it clearly. Because it's near the oil filter, you might need to partially remove the filter or some related parts to get a good view of it. Always consult a repair manual for your specific engine (Northstar 4.6L or other) for precise location and removal instructions.