Dead battery no trunk access.

Check the link, it is for a CTS but should be similar to yours. https://www.justanswer.com/cadillac/9prkf-open-cadillac-cts-dead-battery.html

There should be a hidden key in the key fob that will open the trunk. The trunk keyhole is above the rear license plate under the trunk lip. I have posted a link, but it is held up due to this websites security rules.

This also worked on my 2014 CTS Wagon. Push down on the little tab at the side of the key fob and then pull out on the head of the key fob. The key is attached to the head of the key fob. Once you're inside the car, you can open the engine lid and also get into the back of the wagon. The battery is located inside the right rear of the wagon, behind a removable access panel.

I can’t find it I have a 2014 Cadillac and I’ve been looking for it to open my trunk and it seems that my car doesn’t have it please if u can tex me bk to let me know where it is. Thanks