The 2007 Yukon XL Denali has been designed to be a real driver's SUV. High-tech advancements such as StabiliTrak Electronic Stability Control System, a 380-horsepower V8 engine and full-time all-wheel drive give Denali XL a mix of power and handling. Yukon XL Denali. It's not more than you need. It's just more than you're used to. Professional Grade Engineering.