How do you fix an antifreeze leak on a 2000 Leganza Daewoo?

Depends on where in the cooling system the leak is. Some choices are:

-Busted hose Find and replace house -Bad radiator Replace radiator -Leaking thermostat housing Replace thermostat housing and gasket -Failing water pump Replace water pump. While doing this, replace timing belt, tensioner, and idlers, as this is quick task, replace it all while you are in there.