GMC 2005 Sierra 1500 Pickup Owner's Manual page 201

When you turn the right front passenger's airbag off,
this light will come on and stay on to remind you that the
airbag has been turned off. This light will go off when
you turn the airbag on.
CAUTION:
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If the right front passenger's airbag is turned off
for a person who is not in a risk group identified
by the national government, that person will not
have the extra protection of an airbag. In a
crash, the airbag will not be able to inflate and
help protect the person sitting there. Do not turn
off the passenger's airbag unless the person
sitting there is in a risk group. See Airbag Off
Switch on page 1-73 for more on this, including
important safety information.
CAUTION:
{
If the airbag readiness light ever comes on
when you have turned off the airbag, it means
that something may be wrong with the airbag
system. The right front passenger's airbag
could inflate even though the switch is off.
If your vehicle is a regular cab pickup and this
ever happens, do not let anyone whom the
national government has identified as a
member of a passenger airbag risk group sit in
the right front passenger's position (for
example, do not secure a rear-facing child
restraint in your vehicle) until you have your
vehicle serviced.
If your vehicle is an extended cab pickup and
this ever happens, do not let anyone whom the
national government has identified as a
member of the passenger airbag risk group sit
in the right front passenger's position (for
example, do not secure a rear-facing child
restraint in the right front passenger's seat)
until you have your vehicle serviced.
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