it's not the radio it's the interface used, I'm guessing you could tell it is 07 and just use the obd adapter for the data to the radio, I know certain things on the maestro can be bypassed or just simply not connected and could likely just be used for a obd data feed onlyfrom the pic that looks just like torque app and that app is open source. so I'd guess yours right, as long as the radio you pick will support the app and had Bluetooth to a cheap dongle. it seems like it should work.
might be a blue too plug in missing but the pids for the standard obd 2 data is the same for both trucks. I don't see how the radio would know it's in a 06 vs and 07?