Regular-length Yukons come with a 4.8-liter V8 or an optional 5.3-liter V8. The 5.3 is standard on Yukon XL 1500s. Denalis and Yukon XL 2500s use a 6.0 V8. An 8.1-liter V8 is available for Yukon XL 2500s. All have automatic transmission with GM's Tow/Haul mode. Denalis have standard all-wheel drive without low-range gearing. Yukons offer rear-wheel drive with standard traction control, or GM's Autotrac 4WD that can be left engaged on dry pavement and includes low-range gearing.