Chevrolet 1995 Cavalier Owner's Manual page 58

The key is for the ignition,
the doors and all other
locks.
When a new Chevrolet is delivered, the dealer removes
the key tag from the key, and gives it to the first owner.
Each tag has a code
on
it that tells your dealer or a
qualified locksmith how to make extra keys. Keep the
tag in a safe place. If you lose your key, you'll be able to
have a new one made easily using the tag.
I
NOTICE:
Your Chevrolet has a number of new features
that can help prevent theft. But you can have a
lot of trouble getting into your vehicle if you ever
lock your keys inside. You may even have to
damage your vehicle to get in. So be sure you
have extra keys.
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