Trailer software
I am not absolutely sure that I understand your question. Are you asking if you can upgrade the 2016 so it will have BLIS w/Trailer Tow like the 2017 trucks do? If that is your real question, there is more involved than just a software upgrade. If that is not your question, then I don't see the use of telling the truck how long the trailer is.
I have a friend that has a 2017 and he showed me how he was able to define the length of his trailer during the trailer setup, I know my 2016 did not allow me to define that. I was hoping it was just a software update that would give me that option. Thanks for the reply.

