Both engines develop 460 lb-ft of torque, but the V8 outguns the Duramax on horsepower with 420 hp versus 277 hp. The diesel makes up for its lack of grunt with superior fuel economy. No matter which engine you choose, power goes out through a 10-speed automatic transmission to standard Active Response 4WD.
As expected from the top Yukon trim, the vehicle comes loaded with flashy GM technology, including Magnetic Ride Control, Air Ride Adaptive Suspension, and an electronic limited-slip differential. Available but not standard is GM’s class-leading Super Cruise technology, which now works while trailering.
Inside, the Denali Ultimate trim sports outstanding materials. The Alpine Umber interior is finished in full-grain leather for all three rows with exclusive contrast stitching. Other premium materials include aluminum decor trim, and open-pore Paldao woodgrain with an etched topological map of Mount Denali.