1998 Chevrolet Astro Owner's Manual - Page 33

Shoulder Belt Height Ad.juster Before you begin to drive, move the shoulder belt adjuster to the height that is rightfor you. " The lap part of the belt should be worn low and snug on the hips, just touching the thighs. In a crash, this applies force to the strong pelvic bones. And you'd be less likely to slide under the lap belt. If you slid under it, the belt would apply force at your abdomen. This could cause serious or even fatal injuries.The shoulder belt shouldgo over the shoulder and across the chest. These parts the of body are best able to take belt restraining forces. The safety belt locks if there's a sudden stop or a crash. 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 theshoulder 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. 1-19