Originally Posted by RamOnTheHill
You can switch it to the Aux input - as long as nothing's plugged into the jack, the radio won't play. (Making me think of the country song "if my phone's not ringing, it's you not calling")
The other thing I've done is turn the volume down to 1 (because 0 is mute, and will come back on at a loud volume when you start the truck, at least with the firmware I have).
Yeah, I've done the pressing of the AUX soft-key on the display to not have the radio playing, but it's only a work-around solution at best. The radio still comes on when you start the truck no matter what you do, because it always defaults to the radio upon start-up. Crazy man.