I started the vehicle and backed it up to leave my house. I could not see out of my inside rearview mirror nor the outside driver's side mirror because they had apparently auto dimmed even though there was no lights behind me at all. I cycled the ignition off and then on again and the mirrors went back to operating normally.

Update from Dec 31, 2016: This issue was related to a short in the courtesy light module. Repaired by dealer.