The Yukon XL is GMCs extended wheelbase full-size SUV cousin to the Chevrolet Suburban. The history goes back to the 1935 Chevrolet Suburban Carryall, but the real predecessor was introduced in 1973 as the 4-door GMC Suburban. For 2000 the GMC Suburban became the Yukon XL, leaving the Suburban name to Chevrolet. The all-new Yukon XL debuted as a 2007 model in early 2006. The GMC Yukon XL comes standard with the OnStar advanced communication system