Remember, similarly equipped, Yukon's are about $3k more MSRP than Tahoes...
There is a reason, this is one of them...
GMC also gets fog lights, laminated front door glass, real wood with real Aluminum accent interior on the Denali, Real Leather in both 1st and 2nd rows, and a few others...its pay to play!
But, at $25/month for 35 months, had you known, that in and of itself is 825 of the $3k difference...
Disclosing the info...kind of a grey area. GM does disclose that the Denali and AT4 get "3 Years of connected services included"
Chevy doesn't say "you get a measly 1 month," they just say nothing...with some footnotes saying "additional services required" or whatever...
A good dealer should point this out...but...if the dealer sells Chevy's...they wouldn't want to upsell you into a product they don't sell...
Cross shopping between GM brands is admittedly difficult, there isn't a great place to do a comparison.
Best way is to print the detailed specs sheet, on all the brands, and lay them side by side and compare...