GMC 2012 Terrain Owner's Manual page 106

3-52 Seats and Restraints
In Canada, the law requires that
forward-facing child restraints have
a top tether, and that the tether be
attached.
If the child restraint does not have
the LATCH system, you will be
using the safety belt to secure
the child restraint in this position.
Be sure to follow the instructions
that came with the child restraint.
Secure the child in the child restraint
when and as the instructions say.
If more than one child restraint
needs to be installed in the rear
seat, be sure to read Where to
Put the Restraint on page 3 43.
1. Put the child restraint on
the seat.
2. 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.
3. 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.
4. Pull the shoulder belt all the
way out of the retractor to set
the lock. When the retractor lock
is set, the belt can be tightened
but not pulled out of the
retractor.