Where is the oil pressure sending unit switch on a 1992 Buick LeSabre?

The oil pressure sending unit switch on a 1992 Buick LeSabre is located on the passenger side of the engine block, near the oil filter. It's a small switch, often with one or two wires connected to it. You might need to get underneath the car for a clear view. Because there are variations depending on the specific engine (3.3L or 3.8L V6), a picture from a repair manual or online forum specific to the 1992 LeSabre with your engine size would be very helpful in pinpointing the exact location.