Hummer H2 2010 Owner's Manual page 102

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 4 28.
2. Put the child restraint on the seat.
2-64
If the seat has a safety belt guide, remove the
safety belt from the guide by sliding the webbing
through the opening on the guide. Do not secure
the child restraint with the safety belt routed
through the guide.
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.
4. Push the latch plate into the buckle until it clicks.
Position the release button on the buckle so that
the safety belt could be quickly unbuckled if
necessary.