How do you flush a radiator on a 1997 Geo Prism?

To flush the radiator on a 1997 Geo Prism, start by ensuring the engine is cool and then remove the radiator cap. Place a container under the radiator and open the drain valve at the bottom to let the old coolant drain out. After draining, close the valve, fill the radiator with a radiator flush solution and water, run the engine for about 10-15 minutes, then drain again. Finally, refill the radiator with the appropriate coolant mixture, and replace the cap.