Both the Yukon and Yukon XL have physically grown, measuring almost five inches longer between the axles and offering more than 20 additional cubic feet of max cargo room compared to the outgoing version. The shorty Yukon in particular is over 6 inches longer than the 2020 model, while most of the growth on the XL truck comes from a longer wheelbase. Both see massive increases in third-row legroom and cargo space thanks to the new independent rear suspension, just like in the Suburban and Tahoe.

To help the newer, bigger Yukons negotiate their way into tight parking spaces a little easier, they're now available with nine different around-car camera views, the most POVs available in the segment, according to GMC. This follows GMC's push to make towing in their pickup trucks as easy as possible with about a billion different cameras and 3-D view options to keep an eye on your trailer—speaking of which, towing specs haven't been released yet.

Also class-leading is the optional 420-horsepower, 6.2-liter V8. For the more efficiency-minded, the 2021 Yukon and Yukon XL can be had with a standard 5.3-liter V8 or 3.0-liter straight-six turbo diesel. Both V8s feature stop/start and cylinder deactivation that lets them run on as few as two cylinders, and a 10-speed transmission runs the show.

The 2021 GMC Yukon and Yukon XL can be had in either the luxurious Denali trim, which we all know (and based on sales, love), or the new AT4 off-road package. AT4 is GMC's push to make a genuinely off-road-capable version of every vehicle, an argument bolstered here by a two-speed transfer case, skid plates, and a higher-clearance front bumper. Ground clearance (not given) can be increased by the adjustable air suspension, so the AT4 should get you through most normal-person slippery situations. But you won't get that far off-road in something this big without a rear locker, which isn't available (though its electronic limited-slip differential will help).