1990 Chevy cavalier oil pressure sender location?

The oil pressure sender on a 1990 Chevy Cavalier is located on the driver's side (left) of the engine block, near the oil filter. It's a relatively small unit with one or two wires attached. However, the exact position can vary slightly depending on the engine (e.g., 1.8L, 2.0L, 2.5L V6). You'll likely need to consult a repair manual specific to your Cavalier's engine for a precise visual location. A picture search online for "[your engine size] Chevy Cavalier oil pressure sender location" might also be helpful.