GMC Sierra 2008 Owner's Manual page 62

CAUTION:
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If the airbag readiness light ever comes on
when you have turned off the airbag, it means
that something may be wrong with the airbag
system. The right front passenger's airbag
could inflate even though the switch is off. If
this ever happens, do not let anyone whom the
national government has identified as a
member of a passenger airbag risk group sit in
the right front passenger's position (for
example, do not secure a rear-facing child
restraint in the right front passenger's seat)
until you have your vehicle serviced. See
Airbag Off Switch on page 1-75 and Airbag
Readiness Light on page 3-41 for more on this,
including important safety information.
If the vehicle does not have a rear seat that will
accommodate a rear-facing child restraint, a rear-facing
child restraint should not be installed in the vehicle,
even if the airbag is off.
1-58
If your child restraint has the LATCH system, see Lower
Anchors and Tethers for Children (LATCH) on
page 1-46 for how and where to install your child
restraint using LATCH. If you secure a child restraint
using a safety belt and it uses a top tether, see Lower
Anchors and Tethers for Children (LATCH) on
page 1-46 for top tether anchor locations.
Do not secure a child restraint in a position without a
top tether anchor if a national or local law requires that
the top tether be anchored, or if the instructions that
come with the child restraint say that the top strap must
be anchored.
In Canada, the law requires that forward-facing child
restraints have a top tether, and that the tether be
attached.
You will be using the lap-shoulder belt to secure the
child restraint in this position. Follow the instructions that
came with the child restraint.
1. Move the seat as far back as it will go before
securing the forward-facing child restraint.
If you have no other choice but to install a rear-facing
child restraint in this seat, make sure the airbag is off
once the child restraint has been installed.
When the airbag off switch has turned off the right
front passenger frontal airbag, the off indicator in the
airbag off light should light and stay lit when you start
the vehicle. See Airbag Off Light on page 3-42.