1997 Chevrolet Astro Owner's Manual - Page 44

You can be seriously hurt your shoulder belt is if too loose. In a crash, you would move forward too much, which could increase injury. The shoulder belt should against your body. fit The lap part of the belt shouldbe worn low and snugon the hips,just touching the thighs. In a crash, this applies force to the strong pelvic bones. And you'dbe less likely to slide under thelap 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 should go 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 ora crash. To unlatch the belt, just push the button on the buckle. 1-36