The 2017 GMC Yukon XL is part of the fourth generation of this full-size SUV. It comes in three trims: SLE, SLT, and the luxury-oriented Denali. The Yukon XL is powered by a 5.3L V8 engine that produces 355 horsepower; the Denali trim upgrades this to a 6.2L V8 with 420 horsepower. Both engines pair with a six-speed automatic transmission, with the option for four-wheel drive. Standard features include a backup camera, a Bose audio system, and an 8-inch touch screen with Apple CarPlay and Android Auto. Higher trims add features such as a power liftgate, leather upholstery, and advanced safety features like forward collision alert and lane keep assist. The 2017 model year saw the addition of the Teen Driver system, which allows parents to monitor their youngster's driving habits.