Genuine GM Accessories 15239247 Park Assist Alarm Sensor Kit Fits: 2006-2011 Lucerne, 2003-2013 Express/Savanna, 2007-2013 Avalanche Sierra/Silverado, Escalade, Traverse Direct OEM replacement Manufactured with high quality materials and to the exact specifications of your GM Genuine GM/Chevrolet part 12 month warranty; This kit includes one sensor and one O ring gasket