The radiator drain plug on a 2004 Chevy Aveo is located at the
bottom of the radiator, typically on the
driver's side. However, it's not always easily visible. You'll likely need to get under the car to find it. It's usually a small, relatively low-profile plug, possibly with a square or hexagonal head.
Important Note: Before attempting to drain your radiator, consult your owner's manual for the specific location and procedure. This ensures you avoid damaging the radiator or other components. Also, be prepared to catch the coolant in a suitable container, as it will be hot.