Not sure if this will help with a 2017 Volt but on the 2017 Bolt EV forum there is a thread that includes instructions for resetting the Bolt's Infotainment system: http://www.chevybolt.org/forum/26-electronics-audio-lighting/7434-infotainment-software-frozen-black-screen.html
On the Bolt, pressing the "Home" and "Fast Forward" buttons for 10 seconds will reset the infotainment system.
On the Bolt, pressing the "Home" and "Fast Forward" buttons for 10 seconds will reset the infotainment system.