Chevrolet Suburban 2007 Owner's Manual page 104

The passenger sensing system is designed to
enable (may inflate) the right front passenger's
airbag anytime the system senses that a person of
adult size is sitting properly in the right front
passenger's seat. When the passenger sensing
system has allowed the airbag to be enabled, the
on indicator will light and stay lit to remind you that
the airbag is active.
For some children who have outgrown child
restraints and for very small adults, the passenger
sensing system may or may not turn off the right
front passenger's airbag, depending upon the
person's seating posture and body build. Everyone
in your vehicle who has outgrown child restraints
should wear a safety belt properly — whether or not
there is an airbag for that person.
If a person of adult-size is sitting in the right front
passenger's seat, but the off indicator is lit, it could
be because that person is not sitting properly in the
seat. If this happens, turn the vehicle off and ask
the person to place the seatback in the fully upright
position, then sit upright in the seat, centered on the
seat cushion, with the person's legs comfortably
extended. Restart the vehicle and have the person
remain in this position for about two minutes. This
will allow the system to detect that person and then
enable the passenger's airbag.
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