Music will not play through USB on Iphone 13 pro updated to 15.1.1

First of all apologies nobody reacted yo your post for 4 days but I guess none of us have that combination of phone and car.

The standard response is talk to your dealer for an update to your Chevvy audio. I am not confident of that happening in a 7 year old vehicle.

I am surprised that 15.0.2 works but 15.1 doesn't.

You can't go back to 15.0.2 by any means that we can recommend here.

First remove all security and VPN apps and test again.

You could then try a backup and restore.

Backup and restore (using the computer method preferably)

(1)How to back up your iPhone, iPad, and iPod touch – Apple Support

Unlock SIM PIN if locked.

(2) Restore your iPhone, iPad, or iPod to factory settings – Apple Support

Set up as new without restoring the backup and test the audio connection.

(3) Restore your iPhone, iPad, or iPod touch from a backup

If it works after (2) but not after(3) it is a bad app or setting

Same here. 2011 Chevy Camaro, new iPhone 13 charges but the car does not recognize it whereas my XR worked perfect. General consensus is it's a bug in the software that I am hoping gets addressed immediately.

There has to be a point where peripherals no longer support an update.

If anyone at GM is responsible for beta testing iOS against their products then GM are responsible and should have warned customers not to update.

But that is not GM in my experience, I used to work for them. My 2015 Vauxhall very soon dropped off the perch regarding connectivity,

I would not hold my breath for a fix for a handful of Chevvys when they have a billion users.

I'm having the same issue with my 2016 Chevy, this is annoying since i've used my phone this way in my car daily for the last couple of years.

I completely disagree with the statement above that "There has to be a point where peripherals no longer support an update." A minor version update, from 15.0.2 to 15.1.1, of iOS should be backward compatible. If they are dropping support for a specific USB protocol that should be stated in the release notes, there's nothing like that in the release notes. In my opinion this is clearly a bug in the iOS code, I would hope someone from apple monitor these threads or perhaps theres another place on this site to report bugs. I guess we can only hope they fix the issue in the next iOS update.

You may not agree but it will not change the facts.

If you think it is a bug make a report at http://apple.com/feedback

Did Apple tell you that or Chevrolet?

Check your car entertainment system and make sure you don’t have to update the firmware you might need a media upgrade I had to have that done on my car

As I said at the beginning that is the standard fix, but its up to GM and its dealers to provide one for a 7 year old model which may not even have firmware to update.