CHEVROLET 2010 Express - Manual (Page 127)

It is possible for the PASS-Key ® III+ decoder to learn
the transponder value of a new or replacement key. Up
to 10 keys may be programmed for the vehicle. This
procedure is for learning additional keys only. If all the
currently programmed keys are lost or do not operate,
you must see your dealer/retailer or a locksmith who can
service PASS-Key
® III+ to have keys made and
programmed to the system.
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 key:
1. Verify the new key has 1 stamped on it.
2. Insert the original, already programmed key into the
ignition lock cylinder 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
LOCK/OFF and remove the key.
4. Insert the key to be programmed and turn it to
ON/RUN within 10 seconds of removing the
previous key.
The security message will turn off once the key has
been programmed. It may not be apparent that
the security message went on due to how quickly
the key is programmed.
5. Repeat Steps 1 through 4 if additional keys are to
be programmed.
If you lose or damage a 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.
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