tranfer case model

[tony33]

Hello friends
I drive a 1500 2003 chevy extended cab 4wd whats model its my tranfer case? there;not tags o identificacion plate but a have the round button auto,4lo,4hi,2w i asume have the autotrac sistem but i tried to do an oil change for tranfer case and found red oil like transmision fluid i drive my last car was a 1500 4wd chevy pickuo 2001 and use a blue color transfer case fluid my question is i have a diferent model tranfer case? o somebody mess out my truck? I have two month old with this truck