GMC 2009 Sierra - Manual (Page 39)

{ 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,
CAUTION: (Continued)
CAUTION: (Continued)
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.
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