Yes, the grille guard installs where the tow hooks are. So as long as you have access to the tow hooks you can install this grille guard. The two options are
Polished stainless: 57-3540
Black Steel: 57-3545
Here are the install instructions, https://sharptruck.blob.core.windows.net/webdocuments/75-0014.pdf
Hello the only grille guard it looks like that will fit the 2019 Yukon would be the Luverne Grille Guard. https://www.sharptruck.com/luverne-2-in-tubular-grille-guard
As far as a difference between the Tahoe and Yukon there must be something different either with the bumper or the mounting points on the frame that make the HDX work for the Tahoe but not the Yukon.