According to Duraburb in order to make the '4wd' indicator light up in the dash of a 2007.5+ pickup, all you have to do is have the dealer flash both the ecu and the dash cluster with the VIN info from a 2WD truck with all the options my current truck has.
How or why it works, I dunno, but I would like to have the "H" looking 4wd light come on in my dash when the truck is in 4WD instead of relying on the tiny indicator hidden from view by the gearshift.
Dealer says they won't do it.