Hi everyone. I'm new here and dont know to much about transfer case. I got a 1997 k2500 6.5 diesel with a auto 4l80 trans. The tag on the transfer case says gm243. And I cant really find anything about it it's a 3 push button shift for 4x4 the case is cracked and sure its junk so looking into finding a used one but cant find anything is there a difference with the 243c at all. Thanks for any advice

 

The 'C' is what GM uses.
https://www.randysworldwide.com/product/rtc243g-2/

 

So can I use a 243c in it then?

 

GM makes your K2500, so yes.

If you posted in the GMT400 section, then you would get more help from your fellow owners.