Hummer 2008 H2 - Manual (Page 35)

4. To make the lap part tight, pull up on the
shoulder belt.
It may be necessary to pull stitching on the safety
belt through the latch plate to fully tighten the
lap belt on smaller occupants.
To unlatch the belt, just push the button on the buckle.
The belt should go back out of the way. When the
safety belt is not in use, slide the latch plate up
the safety belt webbing. The latch plate should rest on
the stitching on the safety belt, near the guide loop
on the side wall.
Before you close a door, be sure the belt is out of the
way. If you slam the door on it, you can damage
both the belt and your vehicle.
1-31