motorwerks
Full Access Member
It doesn't appear the rear entertainment and sunroof is standard on the denali. Looks to be part of the open road package. Unless I'm reading it incorrectly here http://media.gm.com/media/us/en/gmc/vehicles/yukon_xl_denali_xl/2015.tab3.html
I think you're right. Although when trying to build it online, the sunroof and rear seat entertainment come up as $0.
Hopefully the website will update itself completely in the next day or so.