Where is coolant drain?

I'm trying to figure out how to drain my coolant/radiator. I removed upper and lower radiator shrouds, took the fan out, but I can't seem to leave the drain plug. I read a couple forums that said on the 97 gmc jimmy it would be on the drivers side but I couldn't find it. On the passenger side near the bottom of the radiator there was a small plug that said you could use a quarter inch ratchet that you would turn slightly and it should drain out, which I removed completely and got nothing. Am I in the wrong spot or removing the wrong piece? Should I just follow the hose from the coolant tank to the radiator and take it off? I'm soooo lost, please help!!!!