Hummer 2008 H2 Owner's Manual page 100

Closing the Spare Tire Carrier
To close the spare tire carrier, do the following:
1. On SUT models swing the tailgate up until it latches
firmly into place.
CAUTION:
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The spare tire carrier must be secured so that
it does not strike and injure someone. Always
close it into the latch forcefully. Make sure that
the release handle is fully closed (down) and
that the cable is attached.
2. Move the spare tire carrier back into place until it
latches, by closing it into the latch forcefully.
The spare tire carrier is latched properly when the
latch handle has lowered to the closed position.
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3. Reinstall the cable (A) by pushing in the button
on the pin (B) and inserting the pin into the latch
bolt nut (C).
4. Pull on the spare tire carrier to make sure it is
firmly latched.