2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 86

3-20 Seats and Restraints Q: What is wrong with this? { WARNING You can be seriously injured if you wear the shoulder belt under your arm. In a crash, your body would move too far forward, which would increase the chance of head and neck injury. Also, the belt would apply too much force to the ribs, which are not as strong as shoulder bones. You could also severely injure internal organs like your liver or spleen. The shoulder belt should go over the shoulder and across the chest. Q: What is wrong with this? A: The shoulder belt is worn under the arm. It should be worn over the shoulder at all times. A: The belt is behind the body.