Buick 2005 Terraza Owner's Manual page 166

If the word ON or the on symbol is lit on the passenger
airbag status indicator, it means that the right front
passenger's airbag or airbags are enabled (may inflate).
CAUTION:
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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 airbag and
seat-mounted side impact airbag (if equipped).
A child in a rear-facing child restraint can be
seriously injured or killed if the right front
passenger's airbag inflates. This is because
the back of the rear-facing child restraint
would be very close to the inflating airbag.
Do not use a rear-facing child restraint in the
right front passenger's seat.
3-36
If the word OFF or the off symbol is lit on the airbag
status indicator, it means that the passenger sensing
system has turned off the right front passenger's
airbag or airbags. See Passenger Sensing System on
page 1-62 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.
CAUTION:
{
If the off indicator and the airbag readiness
light ever come on together, it means that
something may be wrong with the airbag
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 airbags.
See Airbag Readiness Light on page 3-34.