2005 Buick LeSabre Owner's Manual - Page 313

4. Turn the wheel wrench counterclockwise to lower the jack head until it fits under the vehicle. 5. Put the jack into a notch in the frame which is located near each wheel well. The front notch is 8 inches (20 cm) back from the front wheel well. The rear notch is 3 inches (8 cm) forward from the rear wheel well. The notches are accessible through openings in the plastic trim at the bottom of the vehicle. 6. Position the jack and raise the jack head until it fits firmly on the ridge in the vehicle's frame nearest the flat tire. Do not raise the vehicle yet. 5-73