Chevrolet 2009 HHR Owner's Manual page 364

3. Position the jack on the rear position and raise the
jack lift head to fit over the car flange under the
down arrow markings on the rocker panel.
5-86
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.