1993 Buick Century Owner's Manual - Page 213

All Vehicles 1. Using the wheel wrench, loosen all the wheel nuts. Don't remove them yet. A CAUTION: Getting undera vehlcle when It I jacked up f s s dangerous. If the vehiclesllps off the jack,you .could be badly injured or killed. Never get under a vehicle when it I supported only by a s rack. i 2. Position the jack under the vehicle nearest the tire to be changed. The jack location should be approximately five inches (12.7 cm) from the wheel well. I . f .I I