On a 2000 Cadillac Seville, the A/C compressor is typically located on the
passenger side (right side) of the engine. It's a relatively large component, often with multiple pulley grooves, and usually situated near the front of the engine.
However, without seeing the specific engine, it's impossible to give an exact location. A detailed diagram in a repair manual specific to your 2000 Seville would be the most accurate source.
