Thanks to the help of some folks here, I have identified my transfer case as an np203. Now for my next question, is it prefered to shift this case in park,neutral or on the fly? In addition, is there any way to tell just by looking at the transfer case if someone has installed a part-time kit? If there is no kit installed, am I correct in thinking there is no 2wheel drive? Any information would be helpful as this is my first chevy 4x4, all I know is jeeps. Thanks bunches!