1995 Buick Regal Owner's Manual - Page 25

The safety belt locks if there's a sudden stop or crash, or if youpull the beltvery quickly out of the retractor. ShoulderBeltHeightAdjuster (4-Door Models) Before you begin to drive, move the shoulder belt adjuster to the height that is right for you. To move it down, squeeze the release lever 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 you move the adjuster to where you want it. try to move it down without squeezing the release lever to make sure it has locked into position. 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 fillling off your shoulder.