GMC Sierra 2008 Owner's Manual page 69

Never put a rear-facing child restraint in the right front
passenger seat. Here is why:
CAUTION:
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A child in a rear-facing child restraint can be
seriously injured or killed if the right front
passenger's airbag inflates. This is because
the back of the rear-facing child restraint
would be very close to the inflating airbag.
Always secure a rear-facing child restraint
in a rear seat.
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.
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 seat 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.
2. Put the child restraint on the seat.
3. Pick up the latch plate, and run the lap and shoulder
portions of the vehicle's safety belt through or
around the restraint. The child restraint instructions
will show you how.
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