Pontiac 2003 Montana Owner's Manual page 136

To program the new key:
1. Verify the new key has PK3 stamped on it.
2. Insert the ignition key in the ignition and start the
engine. If the engine will not start see your dealer
for service.
3. After the engine has started, turn the key to OFF
and remove the key.
4. Insert the key to be programmed and turn it to RUN
within 10 seconds of removing the previous key.
5. 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.
6. Repeat Steps 1 through 4 if additional keys are to
be programmed.
If you are ever driving and the security message comes
on and stays on, you will be able to restart your
engine if you turn it off. Your PASS-Key@ Ill system,
however, is not working properly and must be serviced
by your dealer. Your vehicle is not protected by the
PASS-Key@ Ill system at this time.
If you lose or damage a PASS-Key@ Ill key, see your
dealer or a locksmith who can service PASS-Key@ Ill to
have a new key made.
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