Chevrolet 2001 Impala Owner's Manual page 280

The diagram shows you where you should place
your jack. Use the bolts (A) as a guide when
positioning the jack lift head (C) near the rear edge
of the front wheel opening (B).
For jacking at the vehicle's front location, put jack
lift about 8.5 inches (21.5 cm) from the rear edge of
the front wheel opening in the cutout of the rocker
panel molding.
Put the compact spare tire near you.
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The diagram shows you where to place your jack.
Use the notch (B) as a guide when positioning the
jack lift head (A) near the front edge of the rear
wheel opening (C).
For jacking at the vehicle's rear location, put the jack
lift head about 4 inches (10 cm) from the front edge
of the rear wheel opening in the cutout of the rocker
panel molding.
Put the compact spare tire near you.