if you are looking for the one in you sig, look under the dash, against the firewall, below the radio. There should be some type of panel/storage/ashtray or something that you can open between the steering column and the radio, a little lower than the radio. squeeze the back to flip the door of ashtray, or whatever it is that is there, to flip it out. flashlight to the fire wall, looking for a box that could be white, tan, grey or black. there will be a sticker on the box, with a 5 digit code. it may be upside down. there is other writing on the sticker, but the code will stand out.