Have a read in here.
I would like to switch from the 8.4 to the 12.1 what do I need to do to make it work.
5thgenrams.com
I just finished the upgrade from 19 Uconnect 8.4 to 20 Uconnect 12. really simple install. and
@MannyN is correct that you will want to take a look at the forum for specifics. This is a different conversation if you are trying to go from Uconnect 4 to Uconnect 5.
What is needed:
Any 12 in screen will work. This is what I used
Sgw bypass:
https://ecri.app/.../ecri-security-module-bypass-2018...
Alfaobd app.
https://play.google.com/store/apps/details...
Obd reader
https://www.amazon.com/.../ref=cm_sw_r_apan_i...
19-20 Compatable module 68317978al * last character is revision so anyone with the part number are for uconnect 12
21 compatable part number 68472372AE* same as above
Get a re-pin harness from user
@Jimmy07 depending on which screen you get you may need to trim the harness. If you don't want to do this check out the forum for a wiring diagram for the repin
The screen and bezel all depend on color, style, and which buttons you need on top if any at all. There are too many to list since colors change as do the buttons at the top depending on 1500, 2500, diesel, lane sense, park assist etc. . All of them work but the top buttons won't function without that stuff being wired up.