GMC offers two different engines based on trim level. SLE and SLT models come with a 5.3-liter V8 engine that produces 355 horsepower and 383 pound-feet of torque. It is paired to a six-speed automatic transmission that sends power to the rear wheels. Four-wheel drive is available with a single-speed transfer case that is optional for all trims, and a two-speed transfer case with low-range gearing is available. The Yukon Denali is powered by a 6.2-liter V8 that produces 420 hp and 460 lb-ft of torque. It comes standard with a new 10-speed automatic and rear-wheel drive. The optional four-wheel drive includes a standard two-speed transfer case.

Standard features for the SLE trim include 18-inch wheels, heated mirrors, foglights, side steps, roof rails, front and rear parking sensors, automatic wipers, cruise control, remote keyless entry and ignition, and a trailer hitch receiver with a wiring harness.

On the inside, you get tri-zone automatic climate control, front bucket seats (with a 10-way power-adjustable driver seat), 60/40-split folding second- and third-row seats, a tilt-only leather-wrapped steering wheel, a teen-driver monitoring system, OnStar communications (including a 4G LTE connection and a Wi-Fi hotspot), a 110-volt household power outlet, Bluetooth, an 8-inch touchscreen, a rearview camera, five USB ports, Apple CarPlay and Android Auto, and a Bose nine-speaker audio system with a CD player and satellite radio.

The optional Enhanced Driver Alert package adds forward collision warning with low-speed automatic braking, automatic high beams, and lane departure warning and intervention. The Convenience package adds a power liftgate, an auto-dimming rearview mirror, power-adjustable pedals and a universal garage door opener.

The SLT trim includes all of the above, along with a hands-free liftgate, power-folding mirrors, an auto-dimming driver-side mirror, blind-spot monitoring with rear cross-traffic alert, keyless entry and ignition, leather upholstery, a heated and power tilt-and-telescoping steering wheel, 12-way power-adjustable front seats, heated and ventilated front seats, heated second-row seats, power-folding second- and third-row seats, driver-seat memory functions and a wireless charging pad.

The top-of-the-line Denali trim adds the larger engine and 10-speed transmission, 20-inch wheels, xenon headlights, adaptive suspension dampers, a trailer brake controller, a head-up display, active noise cancellation, second-row bucket seats, a navigation system and a 10-speaker surround-sound system.

Some features on higher-trimmed models are available on supporting models at additional cost. Optional features for SLE and SLT trims include 22-inch wheels and an HD Trailering package (unique axle ratio, trailer brake controller and a self-leveling suspension). The SLT and Denali are eligible for a sunroof, adaptive cruise control with automatic braking, and a rear-seat entertainment system. The Denali also offers power-retractable side steps and adaptive cruise control.