The four-door Yukon revolutionized the SUV market when it debuted in 1995, giving a full-size alternative to the smaller SUVs without being too cumbersome like some felt the Suburban was. The convenience of a spacious, people-friendly SUV with sufficient cargo and towing capabilities made the Yukon desirable. The Yukon is available in three distinct models: Yukon, Yukon XL and Yukon Hybrid. While the Yukon Hybrid is limited to eight passengers, the Yukon and Yukon XL offer seating for up to nine passengers. The Yukon Denali models provide the highest level of luxury. The GMC Yukon comes with a five-year/100,000-mile powertrain and gets an estimated 19-20 mpg on the highway.