Uconnect won’t maintain connection and changes songs, places calls, puts calls on hold

Hello MoG9650,

Thank you for using Apple Support Communities. Sounds like you’re experiencing some unexpected behaviors when using your iPhone with your  Truck. If so, we’d like to recommend some steps to see if we can further isolate this issue and sort it out. First, you can try to restart your iPhone. This is a simple step that helps refresh things: Restart your iPhone - Apple Support

You can also disconnect/forget your truck via the Bluetooth settings on your iPhone. 

1.) Go to Settings > Bluetooth.

2.) Tap the information button for your Truck and select “Forget this device”. 

3.) Reconnect to your truck and test again. 

If you’re using a cable, try testing a different cable. Also, you might want to consider checking for firmware updates that might be available for your truck stereo. You did mention you had an appointment with your dealership. That might be the best time to ask for a firmware update. 

We hope these steps help out. Thank you for using Apple Support Communities. Take care.

Hello MoG9650,

Thanks for checking with the dealer and letting us know the solution.

Regarding the update, there were issues the other day, but they have been resolved.

Try the troubleshooting here: If your iPhone or iPad won't update

You can also update faster and easier using your computer, depending which kind you have, see the steps here:

Update your iPhone, iPad, or iPod touch with the Finder

Update your iPhone, iPad, or iPod touch with iTunes

Thanks.