Hummer H2 2009 Owner's Manual page 446

Rear Flat Tire – Jack
Rear Flat Tire: Place the jack under the curved
rear axle pad. Make sure the jack head is positioned
so that the rear axle pad is resting securely on
the jack head.
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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.
8. Turn the wheel wrench clockwise to raise the
vehicle. Raise the vehicle far enough off the ground
so there is enough room for the spare tire to
clear the ground.