Hummer 2004 H2 - Manual (Page 399)

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:
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.
X= 28.5 inches (72.0 cm)
Rear Position
5-85