2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 74

3-8 Seats and Restraints WARNING (Continued) For proper protection when the vehicle is in motion, have the seatback upright. Then sit well back in the seat and wear the safety belt properly. Reclining Seatbacks Manual Reclining Seatbacks { WARNING Sitting in a reclined position when the vehicle is in motion can be dangerous. Even when buckled up, the safety belts cannot do their job when reclined like this. The shoulder belt cannot do its job because it will not be against your body. Instead, it will be in front of you. In a crash, you could go into it, receiving neck or other injuries. The lap belt cannot do its job either. In a crash, the belt could go up over your abdomen. The belt forces would be there, not at your pelvic bones. This could cause serious internal injuries. (Continued) { WARNING You can lose control of the vehicle if you try to adjust a manual driver seat while the vehicle is moving. The sudden movement could startle and confuse you, or make you push a pedal when you do not want to. Adjust the driver seat only when the vehicle is not moving. { WARNING If either seatback is not locked, it could move forward in a sudden stop or crash. That could cause injury to the person sitting there. Always push and pull on the seatbacks to be sure they are locked. Do not have a seatback reclined if the vehicle is moving.