Where is the oil pressure switch on a 90 camaro?

The oil pressure switch on a 1990 Camaro is located on the driver's side of the engine block, near the oil filter. It's a small switch, often with a single wire connected to it. However, the exact location might vary slightly depending on the engine (e.g., V6 vs. V8). The best way to be certain is to consult a repair manual specific to your Camaro's engine. A picture of your engine bay would also help confirm the location.