Chevrolet 2003 Monte Carlo Owner's Manual page 68

One key is used for the
ignition, the driver's door
and all other locks.
if you need a new key, contact your dealer for
assistance. In an emergency, contact Chevrolet
Roadside Assistance. See Roadside Assistance
Program on page 7-5 for more information.
Notice: Your vehicle has a number of features
that can help prevent theft. 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
spare keys.
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 OnStap System on
page 2-34 for more information.
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