The full-size GMC Yukon SUV and its corporate sibling, the Chevrolet Tahoe, have both been on the market in their current iterations since 2015. In that time, the Ford Expedition has been completely revamped, giving it a clear edge over GM's SUVs. But GM isn't just about to let Ford hog all of the full-size SUV sales because the company just invested $20 million to build the next-generation Chevy Tahoe, GMC Yukon, and Cadillac Escalade.

The three are expected to arrive as 2021 models and aside from a few spy shots, the details on what these SUVs will look like has been minimal, until now. An Instagram post by c_zr1 (pictured below) claims to be a leaked ad image from GMC, showing a completely exposed 2021 Yukon Denali photographed with an urban background.

Aside from the image, the post only includes a small bit of Arabic text which translates to "GMC Denali's imaginative design." So, is this the final design for the 2021 Yukon Denali? The image does not look to be altered in any way and it does look like the type of scene you might expect to see in a car advertisement. Recent spy photos of the Yukon have not revealed much in terms of design but this image appears to be in line with other recent SUV models from GMC.

The next-generation Yukon should retain its body-on-frame design and we expect a V8 engine to remain under the hood, possibly the new 6.2-liter LT2 V8 from the new Corvette producing 495 horsepower. GMC is rumored to move to a multi-link independent rear suspension rather than the live rear axle used on the current model, which would make it more competitive with the latest Expedition. If the 2021 Yukon Denali looks as good as it does in this image and GMC adds plenty of new tech features and refinement upgrades, Ford may have cause for concern.