You are using the Bluetooth for music only. This has been available on gm trucks for years. What OP is talking about is android auto or Apple CarPlay which turns your center stack display into your phone display. You are able to use some apps directly off of your trucks screen. Google maps, Apple Maps, waze, pandora, phone app, etc. to do this you have to plug in your phone to one of the USB ports. If you try this in your truck you will see the app show up on you center stack. OP is wishing for this functionality to be wireless, which the 2021 Tahoe and Yukon will have when they are released.