Im assuming that is the park lock switch? I was playing around with the BTSI that is attached to the shifter today and the key had been stuck since last night and after messing with the plug it the key came out. Once i pulled it back in the key still came out. I moved the shifter through the gears and once again key stuck. Is removing the part going to cause any other problems or is this just a safety feature put in by gm to make you put the car in park before you remove the key? Not a bad idea actually....weight savings too!!! haha