Hummer 2003 H2 Owner's Manual page 327

Rear Position
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.
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.
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. Turn the ratchet 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.
7. Remove all the wheel
nuts and take off the
flat tire.
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