what fluid for 99 transfer case?

i'm changeing all the fluids on my 99 blazer. it has 66kmi on it, but i bought it used and not sure when or what has been serviced. i've already done the differentials, and i'm taking it to the dealer for the tranny service. i also flushed the dexacool. anything else that i should do? thanks!

i'm changeing all the fluids on my 99 blazer. it has 66kmi on it, but i bought it used and not sure when or what has been serviced. i've already done the differentials, and i'm taking it to the dealer for the tranny service. i also flushed the dexacool. anything else that i should do? thanks!

Standard transmission fluid for the transfer case (dextron III)

Standard transmission fluid for the transfer case (dextron III)
Thanks!