1999 Yukon radiator drain petcock location

Does anyone know where the darn radiator drain petcock is? I can't find one. I want to change the coolant but the only way I see to do this is removing the lower radiatro hose. Has anyone done a coolant change at home on a Yukon? Help wanted.....

Hi, on my New Body Style it is a plastic knob near the lower driver's side corner.
You may or may not have one. It is common to have to make a mess with the lower hose.
Take care, Eggert :bananasmi

Hi, on my New Body Style it is a plastic knob near the lower driver's side corner.
You may or may not have one. It is common to have to make a mess with the lower hose.
Take care, Eggert :bananasmi
Thanks, I found it. It takes a 1/4 inch drive and a quick turn CCW to open. Still makes a mess draining though.