Buick 2002 LeSabre Owner's Manual page 265

4. Put the jack into a notch in the frame which is
located near each wheel well. The front notch is
eight inches (20 cm) back from the front wheel well.
The rear notch is three 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.
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. Put the compact
spare tire near you.
5-24
CAUTION:
Getting under a vehicle when it is jacked up is
dangerous. If the vehicle slips off the jack, you
could be badly injured or killed. Never get under
a vehicle when it is supported only by a jack.
CAUTION:
Raising your vehicle with the jack improperly
positioned can damage the vehicle and even make
the vehicle fall. To help avoid personal injury
and vehicle damage, be sure to fit the jack lift
head into the proper location before raising
the vehicle.