Where is the oil sending unit located on a 92 Chevy s-10 truck?

The oil pressure sending unit on a 1992 Chevy S-10 is located on the driver's side (left side) of the engine block, near the oil filter. It's usually a relatively small unit with one or two wires connected to it. However, the exact location can vary slightly depending on the engine (4.3L V6 or 2.5L/2.8L 4-cylinder). You'll need to visually inspect the engine near the oil filter to locate it.