The new Cadillac XT6 is a much-needed addition to the luxury brand’s vehicle lineup. Featuring three rows of seating for either six of seven passengers, depending on the configuration, the “midsize plus” crossover slots above the midsize Cadillac XT5 and below the full-size Escalade. We recently got our hands on XT6 specs, which enables us to take a look at how these mechanically-related crossovers compare in terms of size and dimensions in todays’s installment of the GM Authority Dimensional Comparison.
Platform
Before we get into the nitty gritty, let’s set a baseline to better understand what we’re dealing with here. All of the models that are part of this Dimensional Comparison are based on the GM C1 platform (pronounced “Chi”). However, there are three different versions of the C1 architecture.
The first is the original, short-wheelbase version. This one has a wheelbase of 112.5 inches and underpins the Cadillac XT5 and the second-generation GMC Acadia. The second is the long-wheelbase version with a wheelbase of 120.9 inches. This one underpins the second iterations of the Chevrolet Traverse and Buick Enclave. And that brings us to the third C1 platform variant.
The third version is based on the original, short-wheelbase version of C1, but with a few minor improvements, the most notable of which (on paper) is the addition of 0.2 inches to the wheelbase. It’s this platform that the Cadillac XT6 is based on.
Exterior
The Cadillac XT6 features a longer, more traditional roof line and a longer rear overhang when compared to the XT5. Both of those elements enable the XT6 its two biggest differentiators – a third row and significantly more cargo room.Looking for a new Traverse? Visit our website 24/7. 
Compared to the XT5, the XT6 is 9.3 inches longer, 2.3 inches wider and 2.9 inches taller, while having a wheelbase that’s 0.2 inches (5 mm) longer. It also has wider front and rear tracks. That story repeats itself when it comes to the GMC Acadia: the XT6 is 5.2 inches longer, 1.9 inches wider, 2.9 inches taller, with a wheelbase that’s 0.2 inches longer. The XT6 has wider tracks – 1.9 inches in the front and 1.7 in the rear. Before you ask, the XT6 does – in fact – have a wider track at the front than at the rear.
Meanwhile, the XT6 is notably smaller than the gargantuan Chevy Traverse in all dimensions. Compared to the Traverse, the XT6 has a wheelbase that’s 8.2 inches shorter, overall length is down 5.5 inches, width is down 1.3 inches, height is down 1.8 inches, and the tracks are down 0.9 and 0.8 inches, respectively.
