Where is the radiator grain plug on 2005 gran prix gtp 3.8l?

The drain plug on a 2005 Pontiac Grand Prix GTP 3.8L radiator is located at the bottom of the radiator, on the driver's side. It's usually a small, plastic or metal plug. You might need a shallow socket or wrench to remove it. Be aware that the coolant will be hot if the engine has recently been running, so take appropriate precautions.