LGH van - auxiliary fuel tank

[Aart]

I installed an auxiliary fuel tank to my 2016 van. Is it possible to have the ECM control it? Could a segment swap from a cab&chassis tune be done? I really don't want to mount a manual switch in the cab to transfer the fuel.

12664192 - Boot Software
12660050 - Main Operating System
12660350 - Fuel system

Thanks!