The Yukon lineup hasn't changed much since the revamped versions arrived in the 2007 model year. They're handsome machines, with good proportions and a minimum of unnecessary detailing; Edmunds praises the Yukon's "handsome styling," and although Jalopnik feels the "GMC Yukon Denali's front looks kind of like a Chevy Tahoe with the grille lopped off and replaced with a chrome chain-link fence," they proclaim "it's big and muscular. We like big and muscular." On the Yukon, a big GMC grille is framed simply by tall headlamps, and big windows are in good proportion to the Yukon's tall side metal. Edmunds reviewers report that when "dressed in black, the Yukon's clean, slab-sided body gives the impression that it's something the Secret Service would use, which is actually true." The Yukon XL is 20 inches longer than standard Yukons, and the extra length goes right into the rear windows and metal, which takes the shape out of balance, but it's still nicely drawn. Cars.com adds "the Yukon XL sports sleeker styling and better-integrated lower body panels than the prior generation," and the "fenders, fog lights and lower side cladding are integrated into the body to create a more continuous appearance than the previous Yukon XL's pieced-together look." Car and Driver sums it up perfectly, declaring these "GMC big boys deliver style" that they deem "tough to top."
The Yukon's interior has slight differences depending on seating configuration; six-seat versions have a high dash without a center console, while five-seat versions get a wide center storage console. Either shows off a quantum leap in interior quality and styling for the big SUV. There's a wide swath of wood grain trim on some versions, as well as softly rounded corners, tight-fitting, tightly grained plastics, and options for fine leather seats. Cars.com reports "a lower dashboard with a traditional instrument panel hump replaces the boxy dash" from the previous generation, and Edmunds applauds the interior; the "cabin certainly looks luxurious, with its wood-tone and metallic accents and padded door inserts," they say. ConsumerGuide is disappointed that the gauges can be "too indistinct for best legibility," though. Denali versions add more luxury touches, like a honeycomb grille up front and Nuance leather and chrome details to the cabin. The Denali's more luxurious interior wins even more praise from reviewers; Edmunds calls it "handsome," and compliments it on a "simple and straightforward" layout. The one major criticism of the overall appearance comes from Jalopnik, where reviewers "feel as though [they've] seen this interior before-like on the GMC Sierra, the Chevy Silverado and the Chevy Tahoe," although they concede that "for the most part it's well-designed."