Small Screen - no BT

[Someone]

Hey there,,,,
Tahoe 2015 LS (Basic) 2x4

The screen is small (4")
There is no Blue Tooth (although the buttons & mic are available)

A. Is it possible to upgrade software to enable bluetooth. / or it requires hardware (of some kind) also.
B. Is it possible to change the small screen to the big one. (after market or original)

(HOW) !!!!!

 

[Miami-Dade]

Welcome from Miami Beach..Check out the sister site as GM service people come on there for some issues to help..It is tahoeyukonforum.com