Draining The Anti-Freeze

Does anyone have info on draining the anti freeze resevoir on a 2002 ls 3.9l?

Its unfortunate but now contaminated and i need to drain out the fluid. If this is a difficult process do you have any idea as to how much it may cost if i took it to a shop? Thanks for any of your knowledge.

there is a drain cock in the lower passenger side of the rad.
it's a simple plastic plug that you loosen with a hex key - that's it.

there are some steps to refilling to make sure that you bleed all the air out.

http://www.lincolnvscadillac.com/tech/Lincoln-LS/CoolingSystemDraining/