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Have you tested with a different CarPlay vehicle to rule out the Volt or your iPhone?
Yes, I've had this happen but it switches to the Iphone, out of say XM radio, because Iphone is doing something like Waze giving a traffic alert. After this happens, it won't switch back to XM radio. I've noticed there are some glitches in the system. I've resigned to using Waze without any alerts, sounds, or notifications, so it doesn't mess with the XM radio.BTW, does anyone else have a problem whereby the car switches to the iPod/iPhone input on its own and refuses to stay in any another audio source (like XM)? I usually listen to the XM source but still have my phone plugged into USB for CarPlay. Most of the time, the car stays on the XM audio input and everything is great. Randomly, though, the car will automatically switch to the iPod/Phone input and no amount of switching back to XM "sticks." This happens completely randomly and I can't find the repeatable set of circumstances to have it happen or prevent it from happening. All I know is that sometimes, I have to resign myself to listening to audio from my Phone instead of XM because I can't get the car to stay on the XM input without completely disconnecting my phone (unpair, unplug, or power off).
Careful which button you click to submit your post. I always gravitate to the big blue "Reply to Thread" button after typing instead of the "Post Quick Reply" button, wiping out my post with a blank text area.I replied to this thread last week and it never showed. WT? Anyway...I did try your suggestions and it does help if you plug the Iphone in before turning on the car
Yup. It does this on mine too ... there's something not quite right between MyLink / CarPlay / Bluetooth and depending on how you connect, what you had playing on your phone before you connected, and what order things get enabled you get any one or more of a large set of symptoms ....Yes, I've had this happen but it switches to the Iphone, out of say XM radio, because Iphone is doing something like Waze giving a traffic alert. After this happens, it won't switch back to XM radio. I've noticed there are some glitches in the system. I've resigned to using Waze without any alerts, sounds, or notifications, so it doesn't mess with the XM radio.
Yep, this is exactly what happened to me last night. I forgot to mention that I did also walk away from the car with the remote before restarting.[*]Worst of all, randomly, the whole system freezes up and you cant switch to anything whatsoever. You cant even press the onstar button. I thought I was doing this by going into gear when the screen message told me to wait but I am now convinced that there is a certain order that things connect in that cause it to do a total freeze and your only option is to switch off the car, walk away (with the remote) and then go back and switch things back on.