Buick 2004 LeSabre Owner's Manual page 84

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PASS-Key III Operation
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When the PASS-Key III system senses that someone
is using the wrong key, it shuts down the vehicle's
starter and fuel systems. The starter will not work and
fuel will stop being delivered to the engine. Anyone
using a trial-and-error method to start the vehicle will be
discouraged because of the high number of electrical
key codes.
When trying to start the vehicle, if the engine does not
start and the SECURITY light comes on, the key
may have a damaged transponder. Turn the ignition off
and try again.
2-20
Your vehicle is equipped
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with the PASS-Key III
(Personalized Automotive
Security System)
theft-deterrent system.
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PASS-Key III is a passive
theft-deterrent system.
This means you don't have
to do anything different
to arm or disarm the
system. It works when you
insert or remove the key
from the ignition.
If the engine still does not start, and the key appears to
be undamaged, try another ignition key. At this time,
you may also want to check the fuse. See Fuses
and Circuit Breakers on page 5-92. If the engine still
does not start with the other key, your vehicle needs
service. If your vehicle does start, the first key may be
faulty. See your dealer who can service the
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PASS-Key III to have a new key made.
It is possible for the PASS-Key
transponder value of a new or replacement key. Up
to 10 additional keys may be programmed for the
vehicle. This procedure is for programming additional
keys only.
Canadian Owners: If you lose or damage your keys,
only a GM dealer can service PASS-Key
have new keys made. To program additional keys you
will need two current driver's keys. You must add a step
to the following procedure. After Step 2, repeat
Steps 1 and 2 with the second current driver's key. Then
continue with Step 3.
To program the new key, do the following:
1. Verify that the new key has PK3 stamped on it.
2. Insert the current driver's 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.
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III decoder to learn the
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III to