There is an extensive key guide begging on page 89 of your Owner's Manual. Per Onwer's Manual, page 93, it does indicate for the a key would have to be programmed by the dealer to match your vehicle. There is a process outlined in the Pass-Key guide for learning new additional keys on page 110. Below is the GM Owner Center link which will allow you access to certain manual and other such services. Please contact us if you have any questions. I hope all is going well.
Matt,
GM Customer Assistance
From 93
Matching Transmitter(s) to Your
Vehicle
Each remote keyless entry transmitter is coded
to prevent another transmitter from unlocking
your vehicle. If a transmitter is lost or stolen,
a replacement can be purchased through your
GM dealer. Remember to bring any additional
transmitters so they can also be re-coded to match
the new transmitter. Once your dealer has coded
the new transmitter, the lost transmitter will not
unlock your vehicle. The vehicle can have a
maximum of eight transmitters matched to it.
See Remote Key under DIC Operation and
Displays on page 191.
From 110
See your dealer/retailer or a locksmith who can
service PASS-Key® III+ to get a new key blank that
is cut exactly as the ignition key that operates
the system.
To program the new additional key:
1. Verify that the new key has a 1 stamped
on it.
2. Insert the original, already programmed, key
in the ignition and start the engine. If the
engine will not start, see your dealer/retailer
for service.
3. After the engine has started, turn the key to
OFF, and remove the key.
4. Insert the new key to be programmed
and turn it to the RUN position within
five seconds of removing the original key.
The security light will turn off once the key has
been programmed.
5. Repeat Steps 1 through 4 if additional keys
are to be programmed.
If you are driving and the security light comes on
and stays on, you may be able to restart your
engine. Your PASS-Key® III+ system, however,
may not be working properly and must be serviced
by your dealer/retailer.
If you lose or damage your PASS-Key® III+ key,
see your dealer/retailer or a locksmith who can
service PASS-Key® III+ to have a new key made.
Do not leave the key or device that disarms or
deactivates the theft deterrent system in the
vehicle.