I have a 2016 yukon xl Denali and the running lights stay on even after the vehicle is shut off. It’s now draining my battery and truck won’t start. Any ideas? Just had my trans replaced and didn’t notice it after that due to the fact I hit a deer the day I got it back! so it went to the shop again. I informed them of it and they couldn’t figure it out and said they could send to dealership but if it wasn’t due to accident I’d have to pay the diagnosis fee. So I held off on getting that done as I just don’t have the extra money.