How do you drain the raditor on a 1995 Chevy Lumina?

Not having done it on a Lumina I will give you an answer that applies to most cars. Under the car at the bottom of the Raditor you will normally see a valve on either the far left or right side. Losen this valve with plires but be careful because many of the valves are made out of plastic. If you cannot find a valve just losen the lower raditor hose clamp and carefully pry the hose from the raditor.

answer if vehicle has valve, it is usually left hand thread so be careful it is also awfully slow using this valve however most cars no longer have this valve so just remove bottom radiator hoes from radiator if engine is hot be careful as coolant will be hot