Wife and I were driving home from Costco tonight and while stopped at a red light heard screeching brakes behind us. Lady almost rear ended us. She gets out of her car and berates me for not having any tail lights on. And sure enough, no tail lights. When I got home I checked the tail lights while light switch was in both Auto and On positions. Head lights and brake lights both work but no tail lights. We just got this car in end of December. 2021 Limited Ascent with 700 miles. Probably been like this since day one. Going to dealership first thing. Happy to still be alive. Other than that it's a great car. Lol. Check your tail light operation.