I like to listen to audiobooks. Is there any hack to allow the audio source to be bluetooth... or even what ever the last audio source used was? My honda fit does this perfectly, the Bolt comes up on FM radio each time I start it. Did I miss something?
I believe the default audio source will be the last source played from within the car's embedded audio options: FM, Satellite, USB, etc. The Bluetooth wouldn't be a default option since the audio source is not embedded into the car's infotainment system.