I believe the GM 13.4 infotainment system, particularly the navigation system and the radio control exhibit a very bad driver distraction that could lead to wrecks. Specifically with much more traffic now a vast majority of people traveling beyond places they are familiar with rely on the bigger screens on new vehicles so they get a clearer picture of turns ahead. I have experienced multiple occasions where the Silverado infotainment/navigation system randomly unpairs itself from my iPhone and then Im forced to handhold a phone for navigation which is illegal in my state. Ive talked to others that have the same problem, the screen going blank and it unpairs whether wireless Bluetooth or USB connected to the proper port. Unacceptable for a $70,000 vehicle. Also GM apparently in an attempt to advertise Sirius radio and subscription plans displays what appear to be warning signs on the display thereby distracting a driver again. The only way to change out of the Sirrus default stations reliably is to push a very small software button smaller than a pencil eraser. Again you must take your eyes off the road for a couple seconds to perfectly align your finger with the active portion of the software button. I see no way to say default to say radio on startup. You can on the steering wheel toggle many pushes to get through factory presets but many of those presets take you back to the menus to order sirrus radio. My background is electrical engineering and IT systems. Ive never seen a more complicated and unreliable sequences and I dont believe GM fully tested it. There is no doubt in my mind its a serious distraction more so than just about any other distraction because its particularly annoying and then puts the driver in a bad mood. I understand Android phones work slightly better but the population of Apple phones is significant. Ive spoken with GM customer service several times and Apple several times GM blames Apple Apple blames GM and Google/Android head unit