My 06 sienna is overheating and it's not leaking at all

Hello, when you say it overheated -- do you mean the temperature gauge went all the way up? Do you mean that the coolant boiled over? If you only drove a half mile, it sounds almost like a stuck thermostat. But it requires hands on testing to know for sure. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops