Product: ( xTune ) Chevy Silverado 2500/3500 11-13 / GMC Sierra 2500/3500 11-13 ( Compatible Single Rear Wheel Model w/ Rear Sensor Model Only) ( Not Compatible without Rear Park Assist Sensors Models ) ( Not Compatible 1500 Models ) Corner Step Style Steel Rear B SKU | UPC: 9949722 | 887769949722 Package Weight & Size:  WT:0    L:0    W:0    H:0