1998 Cadillac Seville Owner's Manual - Page 64

There is a master key that works in all of the lock cylinders (driver's door, glove box,trunk and ignition). There is also a valet key which only operates the driver's door and the ignition. NOTICE: Your vehicle has a number of new features that can help prevent theft. can have a lot of You trouble getting into your vehicleyou ever lock if your key inside and you may have to damage your vehicle to get in. Be sure you have an extra key. Both the master and valet keys have a transponder embedded into the key for security and theft deterrence. The keys also come with bar code tag. Keep bar a the code tag in safe place. If youlose your key you will be a able to have a new made using the bar code tag. one The replacement key must have a transponder embedded in it. 2-3