1997 GMC Safari Owner's Manual - Page 72

A CAUTION: Never do this. a Here a child is sitting in a seat that has lap-shoulder belt, but theshoulder part is behind the child. If the child wears the belt in this way, in a crash thechild might slide under thebelt. The belt's force would then be applied right on the child's abdomen. That could cause serious or fatal injuries. Wherever the child sits, the lap portion of the belt should be worn low and snug on the hips, just touching the child's thighs. This appliesbelt force to the child's pelvic bones in a crash.