Did it on my 2018 just last week just posted it this morning
Finally got light bar mounted after a lot couldn't and had to send light back I have heard. Like so many I didn't know anything about the stupid grill shutters. I wanted the light bar so bad since I was use to one on my 2015 I wanted to find a way.
I fabricated some bracket standoffs I will call them to push the light bar out past the shutters not wanting to do without the shutters functionality. After a lot of cutting and fitting there is a way. I did have to do without the grill shutter extension I will call it and cut the 4 vertical struts from the grill. Now I want to hook the light up to the bright shutter circuit but cant remember where I tapped into it in the under hood fuse box on my 2015. Can anybody help with info.