GMC 2007 Acadia - Manual (Page 38)

To unlatch the belt, 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 the 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.
Shoulder Belt Height Adjustment
Before you begin to drive, move the shoulder belt
height adjuster to the height that is right for you.
Adjust the height so that the shoulder portion of
the belt is centered on your shoulder. The
belt should be away from your face and neck, but
not falling off your shoulder. Incorrect positioning
of the shoulder belt can reduce the effectiveness of
the safety belt.
To move it down, push
down on the button (A)
and move the height
adjuster to the desired
position. You can
move the height
adjuster up by pushing
up on the shoulder
belt guide.
After you move the height adjuster to where you
want it, try to move it down without pushing
the button down to make sure it has locked into
position.
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