Cadillac 2004 CTS Owner's Manual page 63

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Air bags are designed to inflate only once. After an
air bag inflates, you'll need some new parts for
your air bag system. If you don't get them, the air
bag system won't be there to help protect you
in another crash. A new system will include air bag
modules and possibly other parts. The service
manual for your vehicle covers the need to replace
other parts.
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Your vehicle is equipped with an electronic frontal
sensor, which helps the sensing system distinguish
between a moderate frontal impact and a more
severe frontal impact. Your vehicle is also equipped
with a crash sensing and diagnostic module,
which records information about the frontal air bag
system. The module system records information
about the readiness of the system, when the system
commands air bag inflation and driver's safety
belt usage at deployment or near-deployment crash.
The module also records speed, engine RPM,
brake and throttle data.
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Let only qualified technicians work on your air bag
systems. Improper service can mean that an air
bag system won't work properly. See your dealer
for service.
Notice: If you damage the covering for the driver's
or the right front passenger's air bag, or the air
bag covering on the driver's and right front
passenger's seatback, or the side impact air bag
covering on the ceiling near the side windows, the
bag may not work properly. You may have to
replace the air bag module in the steering wheel,
both the air bag module and the instrument panel
for the right front passenger's air bag, the air
bag module and seatback for the driver's and right
front passenger's seat-mounted side impact air
bags, or side impact air bag module and ceiling
covering for the roof-mounted side impact air bag.
Do not open or break the air bag coverings.
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