2005 GMC Sierra 1500 Pickup Owner's Manual - Page 40

Q: What if a child is wearing a lap-shoulder belt, but the child is so small that the shoulder belt is very close to the child's face or neck? move the child toward the center of the vehicle. See Rear Safety Belt Comfort Guides for Children and Small Adults on page 1-30. If the child is sitting in the center rear seat position of a crew cab, move the child toward the safety belt buckle. In either case be sure that the shoulder belt still is on the child's shoulder, so that in a crash the child's upper body would have the restraint that belts provide. If the child is so small that the shoulder belt is still very close to the child's face or neck, you might want to place the child a seat that has a lap belt, if your vehicle has one. A: If the child is sitting in a rear outside seat position, {CAUTION: Never do this. Here two children are wearing the same belt. The belt can not properly spread the impact forces. In a crash, the two children can be crushed together and seriously injured. A belt must be used by only one person at a time. 1-34