2011 Chevrolet Silverado 2500 HD Extended Cab Owner's Manual - Page 83

Seats and Restraints applies force to the strong pelvic bones and you would be less likely to slide under the lap belt. If you slid under it, the belt would apply force on your abdomen. This could cause serious or even fatal injuries. The shoulder belt should go over the shoulder and across the chest. These parts of the body are best able to take belt restraining forces. The shoulder belt locks if there is a sudden stop or crash. A: The shoulder belt is too loose. It will not give as much protection this way. Q: What is wrong with this? 3-17 { WARNING You can be seriously hurt if the shoulder belt is too loose. In a crash, you would move forward too much, which could increase injury. The shoulder belt should fit snugly against your body.