HI I GOT RAM 2020 BUILT TO SERVE AND I WANT TO CHANGE MY RADIO 8,4 FOR THE TESLA 12,1 THAT I GET FROM ANOTHER RAM LONGHORN 2023.i went to chrysler dealer they to told me that i need to have software to make the change.RIGHTNOW THE RADIO IS INSTALL IN MY TRUCK FAN WROKING AND MY BLUETHOOTH TOO BUT NO SCREEN DOES SOMEBODY HAVE THAT PROGRAM TO MAKE WORK THE SCREEN THANK YOU