Bluetooth sounds good. With the aux cable or USB cord it does sound better. But I hate using the USB because it sends the Volt into a long indexing routine to snag the song titles and artists - and that part is buggy. So in my G1 I use Bluetooth for convenience and my daughter uses the aux cable for the simplicity of not having to pair and select Bluetooth audio sources.
Another note, tech aux cable always works. Bluetooth is buggy. When you first start the car, count to 30 or 40 seconds before trying to play a Bluetooth audio source. Any attempts to hurry puts you into a sequence of turning off Bluetooth on the phone, turning it back on, trying audio, power cycling the bolt infotainment system, repeating. If at first audio doesn't flow, on a newer iPhone, swipe up from the bottom, swipe left if you aren't already on the audio controller, tap the triangle button, then select the iPhone speakers for the audio out, then select the volt an audio should start flowing. But I find it easier to back out, turn around, then fiddle then change audio source to Bluetooth - patience always works.
Another note, tech aux cable always works. Bluetooth is buggy. When you first start the car, count to 30 or 40 seconds before trying to play a Bluetooth audio source. Any attempts to hurry puts you into a sequence of turning off Bluetooth on the phone, turning it back on, trying audio, power cycling the bolt infotainment system, repeating. If at first audio doesn't flow, on a newer iPhone, swipe up from the bottom, swipe left if you aren't already on the audio controller, tap the triangle button, then select the iPhone speakers for the audio out, then select the volt an audio should start flowing. But I find it easier to back out, turn around, then fiddle then change audio source to Bluetooth - patience always works.
