The 2015 GMC Yukon XL is an extended-length full-size SUV with robust towing capabilities. Part of the vehicle's fourth generation (2015-2020), it's available in three trims: SLE, SLT, and the well-appointed Denali. It comes with either a 5.3-liter V8 (355 horsepower) or a 6.2-liter V8 (420 horsepower) for the Denali, both mated to a six-speed automatic transmission. Rear-wheel drive is standard with four-wheel drive as an option. The Yukon XL offers advanced safety features such as forward collision alert, lane departure warning, and a safety alert seat. Inside, the cabin features an 8-inch touchscreen equipped with GMC's IntelliLink infotainment system, offering Apple CarPlay, Android Auto and a Wi-Fi hotspot.