Hummer H2 2010 Owner's Manual page 480

4. Use the wheel wrench and the wheel wrench
extension to tighten the nuts firmly. Try to move the
tire back and forth slightly to be sure it is secure.
6-100
5. 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 will still need to reinstall the
license plate holder on the spare tire carrier.