GMC Terrain 2017 Owner's Manual page 57

56 Seats and Restraints
To install:
1. Remove the guide from its
storage pocket on the side of
the seatback.
2. Place the guide over the belt,
and insert the two edges of the
belt into the slots of the guide.
3. Be sure that the belt is not
twisted and it lies flat. The
elastic cord must be behind the
belt with the plastic guide on
the front.
4. Buckle, position, and release
the safety belt as described
previously in this section. Make
sure that the shoulder belt
crosses the shoulder. The belt
should be close to, but not
contacting, the neck.
To remove and store the comfort
guide, squeeze the belt edges
together so that the safety belt can