The amount of refrigerant (R-134a, not technically called Freon anymore, though that term is still commonly used) in a Chevy Aveo's air conditioning system varies slightly depending on the model year and specific AC system components. However, it's typically in the range of
2.0 to 2.5 pounds.
You should never attempt to determine or add refrigerant yourself. This requires specialized equipment and training to avoid damage to the system and potential injury. Always consult a qualified automotive AC technician for any service or repairs related to your Aveo's air conditioning.