Despite all of the news about shrinking sales of large SUVs, this segment is still expected to move between 700-800,000 units annually, with General Motors reportedly grabbing 62 percent of that pie. Gas prices may continue to be volatile, but the fact remains that thousands of American car buyers continue to choose the utility of a large vehicle like the 2007 Chevrolet Suburban versus smaller and more efficient alternatives. Competition in this field has largely been limited to the Ford Excursion (and fellow GM players like the GMC Yukon XL and Cadillac Escalade ESV), but that model is being replaced by an extended version of the Expedition that promises to fight for its spot in American driveways. Couple that with GM’s tarnished image, and one can see how vital it is that the 2007 Chevrolet Suburban maintains its position as the one to beat.