GMC 2010 Sierra - Manual (Page 127)

{ WARNING:
If the airbag readiness light ever comes on and
stays on, it means that something may be wrong
with the airbag system. For example, the right
front passenger airbag could inflate even though
the airbag on-off switch is turned off.
To help avoid injury to yourself or others, have
the vehicle serviced right away. See Airbag
Readiness Light on page 4‑33 for more
information, including important safety information.
United States Canada
To turn the right front passenger airbag on again, insert
the ignition key into the switch, push in, and move the
switch to the on position.
The right front passenger frontal airbag is now enabled
(may inflate). See Airbag Off Light on page 4‑34 for
more information.
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