1998 GMC Safari Owner's Manual - Page 81

I Never do this. Here a child is sitting a seat that has a in lap-shoulder belt, but the shoulder part is behind the child. If the child wearsthe belt in this way, in a crash the child might slide under the belt. The belt's force would then be appliedright on the child's abdomen.That could cause serious or fatal injuries. Wherever the childsits, the lap portion of the belt should be worn low and snug on the hips, touching just the child's thighs.This applies beltforce to the child's pelvic bones in a crash. 1-67