Buick 2004 Park Avenue Owner's Manual page 327

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.
6. Raise the vehicle by turning the wheel wrench
clockwise in the jack. Raise the vehicle far
enough off the ground so there is enough room
for the compact spare tire to fit underneath
the wheel well.
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