Hummer 2008 H2 - Manual (Page 433)

5. Try to move the tire back and forth slightly to make
sure it is secure.
6. Slide the license plate holder onto the spare or flat
tire. Secure it from the back of the tire carrier with
the wing nut.
If you choose not to reinstall the spare or flat tire on
the vehicle, you still need to reinstall the license
plate holder on the spare tire carrier.
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