When I went to buy my escalade, the rear view mirror wasn’t a screen on the 16 like it is on the 17. We have two rear cams, one for backing up, and a wide angle for looking rearward.
Also if you look at the 16 vs 17 rear bumper. The 16 doesn’t have sensors directly to the sides of the front and rear bumpers, the 17 does
Look in this pic, look in front of the rear tire, but before the bumper lights. There is a sensor, the 16 I looked at didn’t have it.
Mind you my experience is limited to the escalade version of the new body style. But figured they make changes across the board, considering they do with all the other features like the 10 speed and rear view mirror camera, and kick feature and remote function to roll down windows.