The 2018 GMC Yukon XL is a full-size SUV, extending luxury and versatility. The fourth generation Yukon provides three trims: SLE, SLT, and Denali. The SLE and SLT come with a 5.3L V8 engine delivering 355 horsepower, mated to a six-speed automatic transmission. The top-tier Denali trim features a more potent 6.2L V8 engine producing 420 horsepower with a ten-speed automatic transmission. All trims are available in both 2WD and 4WD configurations. Key safety features include Forward Collision Alert, Lane Keep Assist, and Rear Vision Camera. The infotainment system encompasses a standard 8-inch touchscreen, Apple CarPlay, Android Auto, and available 4G LTE Wi-Fi. Among notable changes for the year, Denali models added a 10-speed automatic transmission.