The Yukon full-size SUV soldiers on in its current form, and still offers room for up to nine passengers. Available in regular and stretched Yukon XL configurations, with a rear-wheel or four-wheel drivetrain, the big SUV relies on a 355-horsepower, 5.3-litre V8 that allows a maximum towing capacity of 8500 lbs. However, the Yukon Denali is faster with its 420-horsepower, 6.2-litre V8 engine.