1996 GMC Sonoma Owner's Manual - Page 36

Children Everyone in a vehicle needs protection! That includes infants and all children smaller than adult size. In fact, the law in every state in the United States and in every Canadian province says children up to some age must be restrained while in a vehicle. Smaller Children and Babies To make it shorter, pull the belt as shown until it is snug. Buckle and position it the same way as the lap part of the driver's safety belt (see "Driver Position" in the Index). Make sure the release button on the buckle is positioned so you would be able to unbuckle the safety belt quickly if you ever had to. To unlatch the belt, just push the button on the buckle. Don't use child restraints on these seats. They won't work properly. Smaller children and babies should always be restrained in a child or infant restraint. The instructions for the restraint will say whether it is the right type and size for yourchild. A very young child's hip bones are so small that a regular belt might not stay on the hips, as it low should. Instead, the belt likely be over the will child's abdomen. In a crash, the belt would apply force right on the child's abdomen, which could cause serious or fatal injuries. So, be sure that any child small enough for one is always properly restrained in a child or infant restraint. 1-28