Buick 2005 Century Owner's Manual page 69

The vehicle has two keys that are used for
separate functions.
The ignition key is for the
ignition only.
The door key is for
the driver door and all
other locks.
The keys have unique codes embedded in them to help
prevent theft. See PASS-Key
more information.
Your dealer or Buick Roadside Assistance can provide
the correct codes for the keys. Contact your dealer
or see Roadside Assistance Program on page 7-6 for
more information.
Notice: If you ever lock your keys in your vehicle,
you may have to damage the vehicle to get in.
Be sure you have spare keys.
If the vehicle has the OnStar
subscription, and the keys were locked inside, a
command could be sent by the OnStar
unlock the vehicle. See OnStar
for more information.
®
II on page 2-16 for
®
system with an active
®
system to
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System on page 2-31
2-3