GMC Acadia Owner's Manual page 72

3-20 Seats and Restraints
Pull the comfort guide out of its
storage location and then return
the headrest to its upright
position.
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 under the
belt and the guide on top.
Warning
A safety belt that is not properly
worn may not provide the
protection needed in a crash. The
person wearing the belt could be
seriously injured. The shoulder
belt should go over the shoulder
Warning (Continued)
and across the chest. These parts
of the body are best able to take
belt restraining forces.
4. Buckle, position, and release the
safety belt as described
previously in this section. Make
sure the shoulder portion of the
belt is on the shoulder and not
falling off of it. The belt should
(Continued)
be close to, but not contacting,
the neck.