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Your five Yukon trim choices are the SLE, SLT, AT4, Denali, and Denali Ultimate. Most have a 5.3-liter V8 engine (SLE, SLT, and AT4) that makes 355 horsepower and 383 pounds-feet of torque, but the Denali gets a 6.2-liter V8 that puts out 420 horsepower and 460 pounds-feet of torque. An available 3.0-liter Duramax turbo-diesel powerplant (277-horsepower and 460 lb.-ft. of torque) is offered for all but the AT4. All engines pair with a 10-speed automatic transmission, with an option between rear- or four-wheel drive. The maximum tow rating of 8,400 pounds means the Yukon can pull good-sized boats, trailers, and campers.
The 3.0-liter turbo-diesel with rear-wheel drive holds the best EPA-estimated fuel economy rating: 21 mpg in the city and 27 mpg on the highway; four-wheel drive drops to 20 city/26 highway. The smaller V8 is rated for 15 city/20 highway with rear- or four-wheel drive, while the larger V8 returns 14 city/20 highway with 2WD or 14 city/18 highway with 4WD.
The SLE supplies cloth upholstery, tri-zone automatic climate control, a 10-way power driver’s seat, an 8-way power passenger seat, keyless start, six USB ports (two in each row), a 12-inch driver information center, a 12V power outlet, rain-sensing windshield wipers, two 120V outlets (center console and cargo area), a 60/40 split-folding third-row bench seat, folding second-row 60/40 split-bench seats, black assist steps, heated power outside mirrors, and 18-inch six-spoke Dark Grey Metallic accented machined aluminum wheels.
The SLT adds perforated leather-appointed seating, wireless device charging, 12-way heated and ventilated power driver and passenger seats, a universal home remote, an auto-dimming rearview mirror, a hands-free power liftgate, and 20-inch six-spoke polished aluminum wheels. The available SLT Luxury Package includes a heated steering wheel, memory settings for the mirrors, driver’s seat and steering column, second-row outboard heated seats, second-row power-release 60/40 split-folding bench seats, third-row power 60/40 split-folding bench seats, and upgraded safety equipment. The SLT Premium Package takes that same roster of amenities and adds a panoramic power sunroof.
The AT4 is an off-road trim with more ground clearance and a greater approach angle, plus specialized equipment such as a two-speed transfer case, red recovery hooks, and underbody skid plates. For comfort and convenience, it gets a heated steering wheel, heated second-row outboard seats, a power 60/40 split-folding third-row bench seat, black roof-mounted side rails, a heated driver’s side auto-dimming power outside mirror, and 20-inch six-spoke Carbon Grey Metallic machined aluminum wheels topped with all-terrain tires.
The Denali adds a 15-inch head-up display, a dual-outlet exhaust, and 20-inch six-spoke polished multi-dimensional aluminum wheels. The available Denali Reserve Package provides power-retractable assist steps with LED perimeter lighting, an electronic limited-slip rear differential, a rear-camera washer, a panoramic power sunroof, 22-inch bright machined aluminum wheels with bright wheel locks, an adaptive air-ride suspension, an integrated trailer-brake controller, and GM’s Super Cruise hands-free driving technology. The Denali Ultimate has the contents of the Denali Reserve Package plus full-grain leather upholstery, 16-way power front seats, a leather-wrapped steering wheel, and a hitch-view camera.
All trims have plenty of standard driver-assist technology. The base SLE has the GMC Pro Safety package, supplying lane keep assist, an HD rearview camera, lane departure warning, front pedestrian braking, automatic emergency braking, forward collision alert, auto high-beam headlights, following distance indicator, front and rear parking sensors, rear seat reminder, and Teen Driver technology. The SLT and above instead receive the GMC Pro Safety Plus package, which adds lane change alert, blind-spot monitoring, and rear cross-traffic alert. Both Denali trims get adaptive cruise control, rear pedestrian alert, and an HD surround-vision display, but only the Denali Ultimate gets a trailer-side blind-zone alert and reverse automatic braking. The AT4 is eligible for the Technology Package (a head-up display, an HD surround-vision display, and rear pedestrian alert).
In the SLE, there’s a 10.2-inch touchscreen infotainment system with Google built-in, wireless Apple CarPlay and Android Auto, Bluetooth, SiriusXM satellite radio, and a 6-speaker sound system. A Wi-Fi hotspot is added at the SLT level. The SLT and AT4 get a premium Bose 9-speaker sound system, while the Denali boosts that to a 14-speaker surround-sound system, and the Denali Ultimate has an 18-speaker Bose sound system, combined with a rear-seat media system that includes dual 12.6-inch LCD HD rear screens and two sets of wireless headphones.