Hummer 2006 H2 Owner's Manual page 415

6. Front Flat Tire:
Position the jack under
the vehicle on the
frame behind the flat
tire where the
frame sections overlap.
See the following
graphic for an
approximate
measurement of the
jack location on
the frame.
Front Flat Tire – Jack A
X = 28.5 inches (72.0 cm)
5-85