CMatt, the ITBC was just a matter of mounting the module to the frame in an OE like location running the additional wires into the stock loom along the frame rail and following the OE schematics to make sure all the wires connected in the right places. some re-pinning of connectors was necessary, and you have to have the CANBUS wire pair tapped into the Canbus circuit of the vehicle. No programing needed for it to work and activate the trailer brakes. The Escalade dash cluster does not display the brake gain or trailer connected signals, it was never intended to have those capabilities so those lights and messages were not programed into its eprom.
On my tech2 I can see that the ITBCM is on the network and communicating, I can also interrogate the ITBCM and see data like brake line pressure, trailer connected, gain, manual apply switch percentage. It hasn’t thrown any codes to date, so it been happy in its new home for the last 200,000 miles.