2013 Equinox 2.4L 2LT (AWD). Driving at 65mph car just shuts down. No dashboard code or indicator. It just turned off with all electrical still on. Would not restart until jumper cables were applied, then it started back up and drove normal, but radio would not turn off, and none of the buttons worked. Drove str8 to Autozone had battery checked it was fine…but this would not cause car to turn off while driving. While at Autozone, turned car off and back on, and the radio functions returned to normal. Sounds like a computer issue.
Might be a computer issue… might be a battery cable issue. Look both the positive and negative cables over very carefully… something might be loose.