Engine Hours Have RESET

[rusty]

my event happened 4 times while driving, all of the dash lights come on as if just turning on the ignition, and the speakers make a static noise.

the car continues to operate normally, but the displays are reset.

[tower]

Replace the on-board computer.

[HUMTECH]

Check your ground connections, their is A tsb on some gm trucks about engine hours resetting and the only thing it tells you to do is check and clean body and engine grounds. Other than that GM engineering is still working on A fix. If you are getting lights flashing on and static from speakers sounds like A ground issue to me. Especially the one inside the hole in the front bumper as it is very exposed to road grime. Also the one on the frame approx. below the drivers door, seen lots of bad grounds there from undercoating.