Where is the rotor located on a Chevy S-10?

The rotor is part of the distributor, and on a Chevy S-10 (depending on the year and engine), the distributor is located on the engine block, usually near the top of the engine, towards the front. Its exact location will vary slightly depending on the specific engine (e.g., 2.8L V6, 4.3L V6). You'll need to consult a repair manual specific to your S-10's year and engine to find the precise location.