Measuring a hulking 222.4 inches in total length, the 2012 GMC Yukon XL avails 45.8 cubic feet of rear cargo room even when the sport utility is packed to its maximum 9-passenger capacity. Sold in SLE, SLT and Denali trim, the 2012 GMC Yukon XL all include standard safety features such as StabiliTrak, six airbags, tire-pressure monitoring system, anti-lock braking and OnStar. On the 2012 Yukon XL SLE model, convenience items include 6-way power driver seat, XM satellite radio and cruise control. Auto-dimming rearview mirror along with a reverse view camera system is added to the SLT model of the 2012 GMC Yukon XL. Both the 2012 GMC Yukon XL SLE and SLT come with a 6-liter Vortec V-8 engine generating 352 horsepower. An E85 compatible engine, the 6-liter V-8 comes in either rear or four-wheel drivetrains. The 2012 Yukon XL Denali presents an elite package of items such as leather seating, power liftgate and 20-inch chrome aluminum wheels. Most notably on the Denali trim is the inclusion of a 403 horsepower, 6.2 liter V-8 engine. Maximum towing for the 2012 Yukon XL is rated at 9,600 pounds.