GMC YUKON XL 2003 Manual page 190

Then, after several more seconds, the status indicator
will light either ON or OFF, or either the on or off symbol
to let you know the status of the right front passenger's
frontal air bag.
If the word ON or the on symbol is lit on the passenger
air bag status indicator, it means that the right front
passenger's frontal air bag is enabled (may inflate).
If the word OFF is lit on the air bag status indicator, it
means that the passenger sensing system has turned off
the right front passenger's frontal air bag. See
Passenger Sensing System on page 1-76 for more on
this, including important safety information.
If, after several seconds, all status indicator lights
remain on, or if there are no lights at all, there may be a
problem with the lights or the passenger sensing
system. See your dealer for service.
I
If the ON indicator comes on when you have a
rear-facing child restraint installed in the right
front passenger's seat, it means that the
passenger sensing system has not turned off
the passenger's frontal air bag. A child in a
rear-facing child restraint can be seriously
injured or killed if the right front passenger's
air bag inflates. This is because the back of
the rear-facing child restraint would be very
close to the inflating air bag. Don't use a
rear-facing child restraint in the right front
passenger's seat unless the air bag has been
turned off.
If the OFF indicator and the air bag readiness
light ever come on together,
it
means that
something may be wrong with the air bag
system. If this ever happens, have the vehicle
serviced promptly, because an adult-size
person sitting in the right front passenger
seat may not have the protection of the
frontal air bag. See "Air Bag Readiness Light"
in the Index.
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