Where is the radiator drain pulg on a 2004 Pontiac gto?

The radiator drain plug on a 2004 Pontiac GTO is located at the bottom of the radiator, on the driver's side. It's usually a small petcock-style valve or a bolt. You'll likely need a wrench or pliers to loosen and remove it. Be prepared for hot coolant if the engine has been running recently. Always allow the engine to cool completely before draining the radiator.