Where is the radiator drain plug on a 2004 Pontiac Grand Prix GT?

The radiator drain plug on a 2004 Pontiac Grand Prix GT is located at the bottom of the radiator, slightly off-center to the driver's side. It is a plastic petcock with a 17mm hex head.

To drain the radiator, turn the petcock counterclockwise with a 17mm socket wrench. Allow the coolant to drain completely before closing the petcock.

Tips:

- Drain the radiator when it is cool to the touch.

- Collect the drained fluid in a large catch pan.

- Replace the coolant after the repair is complete with a 50/50 mix of Dex-Cool coolant and distilled water.