AToK

My rear liftgate on my 2017 GMC Yukon won’t open as it appears that the locking actuator won’t unlatch from the striker. Fuses are all good, I just need to figure out how to manually release the door. I saw how to do it on the 2007-2014 models but they had a discrete area to drill the hole. I can’t find how to do it anywhere for the newer model. Any help is greatly appreciated! Thanks, Andrew