Yukon XL is conservatively styled. GMC takes a more sophisticated, more understated approach to design than Chevrolet. Still, the Yukon XL shares the unmistakable profile of the 'burb.

Denali trades the standard Yukon XL's black grille for a bright mask of fine-metal mesh, but then swaps the base model's chrome bumpers for body-color units, keeping the overall flash level about equal. Round fog lights are neatly tunneled into the lower part of Denali's unique front bumper. Cladding adorns the lower body, running down the sides and incorporating the front and rear stone guards; the Denali's cladding is oddly shaped, but blends nicely into the color-keyed running boards.

For 2005, all Yukon XL models come with a station wagon-style liftgate at the rear, with a glass window that opens independently. Made of lightweight aluminum, the liftgate is convenient for quickly adding and removing cargo. Side-by-side cargo doors are no longer available. Less noticeable changes for 2005 include an extended front air dam with fewer unneeded openings, and more aerodynamically friendly running boards.

Yukon XL 2500 is available with Quadrasteer, an electronically controlled four-wheel steering system that improves maneuverability somewhat at the expense of appearance, as it requires ungainly rear fender flares to accommodate a significantly wider track (the distance between the rear wheels).