[lamping.ap]

I had to do this in my 2012 Acadia at 100k mi. Easy job. Directions aren't really needed to remove the bumper. Just find all the screws up top and follow the fender liners for more screws and pop rivets. I got my hose from the dealer. Parts guy knew exactly what I was talking about. Common problem. The GM part number did change from the original. Hopefully that means they have a new manufacturer that doesn't suck.

 

[lamping.ap]

Here are some pics:
https://imgur.com/a/WidRJyq

Good Luck!