How big is the cooling system in a 2003 Chevy S-10?

There's no single answer to how big the cooling system is in a 2003 Chevy S-10. The size of the cooling system (total coolant capacity) depends on the engine size. A 2.2L engine will have a smaller capacity than a 4.3L V6.

To find the exact capacity, you need to:

* Check your owner's manual: This is the most reliable source. The manual will specify the coolant capacity for your specific S-10 engine.

* Look up your engine size: Find the engine displacement (e.g., 2.2L, 4.3L) usually on a sticker under the hood or on the vehicle identification number (VIN) plate. Then search online (e.g., on a parts website or automotive forum) for the cooling system capacity for that specific engine in a 2003 S-10.

Without knowing your specific engine, I cannot give you a precise answer.