I'm really not sure when they started putting dexcool in, somewhere around '99 comes to mind. Best bet would be to check your owners manual and see what it specifies. I know mine doesn't specify it, but its a '94.
I'll dig out the service manual, I know I found them on mine, but they were hard to get to and extremely tight too, so i never got them out.
EDIT: Looks like the drain plugs are on the engine block on the drivers side between cylinders 5 and 7 forward of the oil filter. There may be one on the other side, but the service manual doesn't show a picture of that side.