GMC 2009 Savana Van Owner's Manual page 29

5. 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, push the button on the buckle. The
belt should return to its stowed position. Slide the
latch plate up the safety belt webbing when the safety
belt is not in use. The latch plate should rest on the
stitching on the safety belt, near the guide loop on the
side wall.
Before a door is closed, be sure the safety belt is out of
the way. If a door is slammed against a safety belt,
damage can occur to both the safety belt and the vehicle.
1-25