1997 Buick Century Owner's Manual - Page 42

You can be seriously hurt your shoulder belt if is too loose. Ina 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 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 chest. These partsof the the body are best able to take belt restraining forces. The safety belt locks if there's a sudden stop ora crash, or if you pull the belt very quickly out of the retractor. To unlatch the belt, just push the button onthe buckle. 1-2s