1997 GMC Suburban Owner's Manual - Page 53

Four-door utility models and the second seat of Suburbans have shoulder belt height adjusters. Move the shoulder belt height adjuster to the height that is right for you. up on the shoulder belt guide. After you move the adjuster to where you want it, try to move it down without pushing in 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 falling off your shoulder. You can be seriously hurt your shoulder belt is if too loose. In a crash, you would moveforward too much, which could increase injury. The shoulder belt should fit against your body. To move the height adjuster down, push in at the word PRESS and move the height adjuster to the desired position. You can move the adjuster up just by pushing 1-43