GMC Yukon 2007 Owner's Manual page 60

CAUTION:
{
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 and
across the chest. These parts of the body
are best able to take belt restraining
forces.
60
4. Buckle, position, and release the safety belt
as described in Rear Seat Passengers on
page 54. Make sure that the shoulder
belt crosses the shoulder.
To remove and store the comfort guide, squeeze
the belt edges together so that you can take
them out of the guide. Slide the guide into
its storage clip on the interior body or storage
pocket on the side of the seat.