Cadillac 2002 Seville Owner's Manual page 63

Master Key
There is a master key that works all of the lock cylinders
(driver's door, trunk, ignition and glove box).
There is also a VALET key which only operates the
driver's door and the ignition.
Your vehicle has the PASS
system. Both the master and VALET key have a
transponder in the key head that matches a decoder in
the vehicle's instrument panel. If a replacement key or
any additional key is needed, you must purchase this key
from your dealer. The key will have PK3 stamped on it.
Keep the bar code tag that came with the original keys.
Give this tag to your dealer if you need a new key made.
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Valet Key
R
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Key III vehicle theft
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Any new PASS Key III key must be programmed
before it will start your vehicle. See "PASS
the Index for more information on programming your
new key.
NOTICE:
Your vehicle has a number of new features that
can help prevent theft. You can have a lot of
trouble getting into your vehicle if you ever lock
your key inside and you may have to damage
your vehicle to get in. Be sure you have an
extra key.
In an emergency, contact Cadillac Roadside Assistance.
See "Roadside Assistance" in the Index.
If your vehicle is equipped with the OnStar system with
an active subscription and you lock your keys inside
the vehicle, OnStar may be able to send a command to
unlock your vehicle. See "OnStar" in the Index for
more information.
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Key III" in