How do you change out the freeze plug on a 3.5 l 1997 intrepid?

That all depends on the location of the faulted freeze plug. If it is located on the block (3 on each side ) they are fairly simple just pop them out and replace ... if it is the plugs on the head you are in for a fun job and i strongly recommend professional help because you may need to remove the transmission to access the 2 plugs behind the bell housing... best of luck

-ken-