Hummer 2007 H2 Owner's Manual page 479

4. Assemble the jack and tools as follows:
Front Flat Tire: Attach the jack handle with
the hook end connected to the hole on
the jack. Slide the wheel wrench onto the jack
handle extension.
Rear Flat Tire: Assemble the jack together
with the jack handle and the jack handle
extensions.
5. Turn the wheel wrench clockwise to raise the
jack head to the lifting point.
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