Here’s a quick walkaround of the 2026 GMC Yukon XL AT4, combining the longer Yukon XL body with the more rugged look and capability of the AT4 trim. See the exterior, AT4 styling, interior, three-row seating and the additional cargo space that makes the Yukon XL different from the standard-length Yukon. Shop our GMC Yukon and Yukon XL AT4 inventory: tinyurl.com/45kb8jrv Questions about the Yukon XL AT4 or another GMC SUV? Call Dave Sinclair Buick-GMC at (314) 842-4200. Shop new Yukon SUVs in St. Louis, Missouri at Dave Sinclair Buick-GMC. #GMCYukonXL #YukonXLAT4 #GMCAT4 #YukonXL #ThreeRowSUV New Buick & GMC Inventory: bit.ly/4dUguGq Used Cars & Trucks: bit.ly/4bV3cXD Custom Trucks & SUVs: bit.ly/4s3tKfn Contact our team: davesinclairbuickgmc.com/contactus.aspx Dave Sinclair Buick GMC is located in St. Louis, Missouri and specializes in new Buick and GMC vehicles, used cars and trucks, GMC Yukon, GMC Sierra 1500, Sierra HD, Denali, A...