Hummer 2006 H2 Owner's Manual page 406

Removing the Spare Tire (SUT)
The spare tire is attached to the tire carrier. To remove
the spare tire, do the following:
1. Open the tire carrier. See Tailgate/Spare Tire
Carrier on page 2-14 for tire carrier operation.
2. Unscrew the wing nut on the back of the tire carrier.
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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.