1997 GMC Safari Owner's Manual - Page 28

Shoulder Belt Height Adjuster Before you begin to drive, move the shoulder belt adjuster to the height that is right for you. To move it down, push in at the top of the arrows and move the height adjuster to the desired position. You can move the adjuster up just by pushing up on the shoulder belt guide. After youmove the adjuster to where you want it, try to move it down without pushing in to make sure it has locked into position. of Adjust the heightso that the shoulder portion the beltis centered on your shoulder.The belt should be away from your face and neck, but not falling your shoulder. off 1-20