Hummer 2007 H3 Owner's Manual page 394

6. Open the tool bag and you will find the
following tools, which you will use to remove
the spare tire and flat tire:
A. Wheel Wrench
B. Jack Handle
Extensions
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C. Jack Handle
D. Jack
E. Wheel Blocks
The spare tire is attached to the outside of the
swing-gate. To remove the spare tire, do the
following:
1. If your vehicle has a spare tire cover
release the latch and open the cover.
Notice: Opening the endgate before
completely closing and latching the spare tire
cover may result in damage to your vehicle.
Close and latch the spare tire cover before
opening the endgate to avoid possible damage.