How do you flush the radiator on a 1989 Cadillac Fleetwood?

To flush the radiator on a 1989 Cadillac Fleetwood, first ensure the engine is cool, then drain the old coolant by removing the drain plug at the bottom of the radiator. Next, fill the radiator with a mixture of water and a radiator flush chemical, running the engine for about 15-20 minutes to circulate the solution. Afterward, drain the flush solution, rinse with clean water until it runs clear, and finally refill the radiator with the appropriate coolant mixture. Always check for leaks and ensure the system is properly bled of air before closing everything up.