radiator drain/flush on 2006 Buick Lucerne

I can not find the petcock on the radiator to drain and flush the sysytem

Asked by for the 2006 Buick Lucerne
The radiator in your 2006 Buick Lucerne does not have a petcock. You will need to remove the lower radiator hose at the radiator to drain the cooling system. Please remember that used coolant is considered a hazardous waste and should be disposed of properly.
Thanx Jim.