The radiator drain plug on a 2005 Pontiac Grand Prix is located at the
bottom of the radiator, on the
driver's side. However, it's not always easily visible. You might need to get down low and look carefully. Sometimes it's hidden behind the lower radiator support or other components. It's usually a small bolt or plug.
Important Note: Before attempting to drain your radiator, ensure the engine is completely cool to prevent burns. Have a suitable drain pan ready to catch the coolant. Also, consult your owner's manual for specific instructions and diagrams, as the exact location and type of drain plug might vary slightly.
