Buick LESABRE 1996 Manual page 72

The ignition key must be clean and dry before it's
inserted in the ignition or the engine may not start. If the
engine does not start and the SECURITY light comes
on, the key may be dirty or wet. Turn the ignition off,
Clean and dry the key. Wait about three minutes and try
again. The SECURITY light may remain on during this
time. If the starter still won't work, and the key appears
to be clean and dry, wait about three minutes and try
another ignition key. At this time, you may also want to
check the fuse (see "Fuses and Circuit Breakers" in the
Index). If the starter won't work with the other key, your
vehicle needs service. If your vehicle does start, the first
ignition key may be faulty. See your Buick dealer or a
locksmith who can service the PASS-Key 11.
If you accidentally use a key that has a damaged or
missing resistor pellet, the starter won't work and the
SECURITY light will flash. But you don't have to wait
three minutes before trying another ignition key.
See your Buick dealer or a locksmith who can service
the PASS-Key I1 to have
a
new key made.
If you're ever driving and and the SECURITY light
comes on and stays on, you will be able to restart your
engine if you turn it off. Your PASS-Key I1 system,
however, is not working properly and must be serviced
by your Buick dealer. Your vehicle is not protected by
the PASS-Key I1 system.
If you lose or damage a PASS-Key I1 ignition key, see
your Buick dealer or a locksmith who can service
PASS-Key I1 to have a new key made.