GMC 2012 Sierra Owner's Manual page 134

3-66 Seats and Restraints
If the child restraint has the LATCH
system, see Lower Anchors and
Tethers for Children (LATCH
System) on page 3 47 for how and
where to install the 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 System) on page 3 47 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.
I n f o r ma t i o n P r o v i d e d b y :
4. Push the latch plate into the
buckle until it clicks.
Make sure the release button
is positioned so you would be
able to unbuckle the safety belt
quickly if necessary.