35929. Left.YUKON. Object sensor. Rear Left. A radar type sensor that can detect objects that may be in the path of the vehicle. A sensor (usually radar based) that detects if an object is in a vehicle's blind spot area. A sensor used to detect if an object is in the way of a liftgate closing. Includes: Rear Lane Departure Sensor. Blind Spot Detection System Warning. Blind spot radar. Collision Warning. CONTROL MODULE. Liftgate Object. Pinch.