2015 GMC Yukon XL / Yukon Denali XL

nicely updated Suburban going on sale, there would be little reason to consider its similarly updated Yukon XL cousin. After all, they both get essentially the same mechanical and styling upgrades. But such thinking overlooks the halo of the GMC brand as well as the magic of the Denali trim and its 6.2-liter V-8.

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The only way to get that inseparable pair is from your friendly GMC store. Roughly half of Yukon and Yukon XL customers opt for the Denali version, and they’ll now enjoy a 6.2-liter V-8 freshly updated with direct fuel injection and a higher compression ratio. Generating 420 horsepower and 460 lb-ft of torque, the Denali’s substantially more powerful V-8 cuts nearly a second from the Yukon XL’s zero-to-60 time, dropping it to around 6.3 seconds. Not bad for a three-ton machine.

The standard Yukon XL benefits from a similarly updated 5.3-liter 355-hp V-8, which makes it about as quick as the last-generation Denali. EPA fuel-economy estimates are up 1 mpg in the city in all powertrains, while highway ratings improve by up to 3 mpg. Towing capacity remains healthy, ranging from 7900 to 8300 pounds.

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mproved performance is always welcome, but the primary reason for buying one of these jumbo machines is to haul stuff. Compared to the regular-wheelbase Yukon and Denali, the XL versions are 20.4 inches stretchier stem to stern, have 26.4 cubic feet more max cargo space, and give adult third-row passengers a fighting chance at comfort with nearly 10 inches more legroom.
The keen buyer might be surprised that despite being slightly wider and longer than its predecessor, luggage capacity in the new XL is down more than 10 percent. Blame the new flat-folding second- and third-row seats that work with a fairly thick shelf added to the rear of the load floor to produce the flat surface. The folding seats are a great convenience, but the thickness of the shelf absorbs some volume. Wider back doors improve seat ingress and egress for all passengers in the aft section.