Kenwood KVT-915DVD Instruction Manual page 122

Accessing the ESN#
-Select Sirius as the source.
-Press the function button (a physical button on front
panel) repeatedly until the control screen comes up.
- On the side of this screen will be a virtual button that
has a wrench on it - press it. This brings up the Setup
menu.
-Scroll through the setup menu and select Sirius
setup. At this point the ESN# should show up.