Chevrolet 2010 Impala Owner's Manual page 98

The passenger sensing system is designed to turn on
(may inflate) the right front passenger frontal airbag
anytime the system senses that a person of adult size
is sitting properly in the right front passenger 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, including children in child restraints,
and for very small adults, the passenger sensing
system may or may not turn off the right front passenger
frontal airbag, depending upon the person's seating
posture and body build. Everyone in the vehicle who has
outgrown child restraints should wear a safety belt
properly — whether or not there is an airbag for that
person.
2-68
WARNING:
{
If the airbag readiness light ever comes on and
stays on, it means that something may be wrong
with the airbag system. To help avoid injury to
yourself or others, have the vehicle serviced right
away. See Airbag Readiness Light on page 4-24
for more information, including important safety
information.