Chevrolet 1997 Cavalier Owner's Manual page 61

One 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 eve
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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