Hummer 2006 H2 Owner's Manual page 412

3. Pull off the license plate holder from the spare tire.
4. For jack A, slide the ratchet onto the wheel
wrench with the DOWN mark facing you. For jack B,
attach the wheel wrench to the wheel wrench
extender to remove the wheel nuts.
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Jack A Tools
5. Turn the ratchet with the wheel wrench (jack A)
counterclockwise to loosen the wheel nuts.