It's located below the exhaust manifold.
Drain the radiator
there isnt one after 1996
Look at the radiator, it should be in the front. It has a cap on it, take it off and you can put coolant in side.
Don't know off hand but you could always pull the lower radiator hose and drain it that way.
lorftion drain plags 3.0 l Ford
its on the bottom side of the radiator with a white plug.
Remove the lower radiator hose.
On the bottom right of the radiator there should be a small square piece that is the plug. You twist it out and the coolant will come out.
Let's drain the coolant, fill it with water, and find out!
remove the lower coolant hose and drain it into a catch pan
drain out coolant to a point were hose is clear, remove hose then replace,add coolant to bring up to normal level...will loose a bit of coolant but not much!!
Wear is drain plug on 1997 GMC 7.4