2020 GMC AT4 2500 HD Random dinking noise when listening to music on Iphone

[GMC AT4]

I have a random dinking sound when listening to music from my iPhone 8. It happens when I am using Bluetooth or hard wired. It also does it when using the Apple Car Play app. Sometime it will ****** several times in a row and sometimes you can go for an hour and not have it ******. The ****** is louder when the volume is turned up. My dealer claims that it is my phone that is causing it. Any help would be appreciated. Thank,   

Edited August 11, 2020 by GMC AT4
Not sure why the word ****** was changed to asterisks

[gSwift]

I've got the iPhone 11 Pro Max and have no issues hardwired or bluetooth. Hope you get it sorted out