1998 Cadillac Catera Owner's Manual - Page 59

A booster seat (F, G) is designed for children who are about40 to 60 lbs. (18 to 27 kg) and of about four to eight years age. It's designed to improve the fit of the vehicle's safety belt system. Booster seats with shields use lap-only belts; however, booster seats without shields use lap-shoulder belts.Booster seats can also help a child to see out the window.