1994 Cadillac Eldorado Owner's Manual - Page 79

The square ignition keys arg for the ignition only. It has a resistor pellet which is part of the vehicle's PASS Key II'system The round key is for the doors and all other locks. i When a new Cadillac is delivered, the dealerremoves the plugs from the keys. Each plug has code on it tells the dealer or qualified locksmith a that a how to make extrakeys. However,the ignition keys do not have a knockout plug.The ignition keys havea bar code tag attached to them. Your dealer orqualified locksmith,by reading the bar code tag, canthen make your ignition keys. There are15 alternative ignition PassKey 1 ' blanks to help discourage 1 theft. Keep the bar code tag and the doorkey plugs ina safe place.If you loose yourkeys you willbe ableto have newones made easily using the plug or barcode tag. 67