WHILE BACKING UP MY DRIVEWAY GLANCED AT THE BACKUP CAMERA.IT APPEARED TO HAVE PLENTY OF DISTANCE LEFT BETWEEN THE REAR OR CAR AND THE GARAGE DOOR. WHILE AT A VERY LOW SPEED , WITHOUT NOTICE ,THE TRUCK HIT THE GARAGE.IT WENT FROM WHAT APPEARED TO BE SEVERAL FEET TO MAKING CONTACT WITH THE GARAGE INSTANTLY. NO SENSORS,LIGHTS OR ALARMS WENT OFF. NO WARNING WHAT SO EVER