GMC 2009 Sierra 1500 Crew Cab Owner's Manual page 80

CAUTION:
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Airbags inflate with great force, faster than the
blink of an eye. Anyone who is up against, or very
close to, any airbag when it inflates can be
seriously injured or killed. Do not sit unnecessarily
close to the airbag, as you would be if you were
sitting on the edge of your seat or leaning forward.
Safety belts help keep you in position before and
during a crash. Always wear your safety belt, even
with airbags. The driver should sit as far back as
possible while still maintaining control of the
vehicle.
Occupants should not lean on or sleep against the
door or side windows in seating positions with
roof-rail airbags.
1-74
CAUTION:
{
Children who are up against, or very close to, any
airbag when it inflates can be seriously injured or
killed. Airbags plus lap-shoulder belts offer
protection for adults and older children, but not for
young children and infants. Neither the vehicle's
safety belt system nor its airbag system is designed
for them. Young children and infants need the
protection that a child restraint system can provide.
Always secure children properly in your vehicle. To
read how, see Older Children on page 1-38 or
Infants and Young Children on page 1-41.
The system checks the airbag electrical system for
malfunctions. The light tells you if there is an electrical
problem. See Airbag Readiness Light on page 3-37
for more information.
There is an airbag
readiness light on the
instrument panel cluster,
which shows the airbag
symbol.