1998 Cadillac DeVille Owner's Manual - Page 278

10.5INCHES 5.8 INCHES (150 mm) (270 mm) 1 3. Position thejack under the vehicle and raise the jack lift head untilit fits firmly into the notch the in vehicle's frame nearestthe flat tire. Put the compact spare tire near you. 4. Raise the vehicle by turning the jack handle tothe right. Raise the vehicle enough off the ground for far the spare tire to fit under the vehicle. 5. Remove all wheel nuts and take the flat tire. off 5-29