Twist the twist knob. See odometer. Hold down the center button of that knob.
'14 2LT w/ DCFC. 85k miles. '17 Bolt Premier w/It All. 53k miles.
GM needs Modern Troubleshooting tools for Modern EV's.
3 step Trouble Tree, 1st try, nope, 2nd try / cost $800. 3rd try fixed it.