Where is the radiator plug for a 1999 Oldsmobile 88?

The radiator drain plug for a 1999 Oldsmobile 88 is typically located at the bottom of the radiator, on the driver's side. It may be a plastic or metal valve that you can unscrew to drain the coolant. Be sure to have a container ready to catch the coolant when you open the plug. Always allow the engine to cool before attempting to drain the radiator.