Where is the oil sending unit on a 2000 Pontiac sunfire?

The oil pressure sending unit on a 2000 Pontiac Sunfire is located on the engine block, near the oil filter. It's a relatively small unit with one or two wires connected to it. However, the exact location might vary slightly depending on the engine (2.2L or 2.4L). You'll likely need to consult a repair manual specific to your Sunfire's engine to get a precise visual location. A picture of your engine bay would also help someone pinpoint it if you're having trouble.