Hummer H2 2009 Owner's Manual page 454

5. Replace the trim cover. Make sure the latches are
pushed down.
6. Place all the tools, except for the wheel blocks, in
the tool bag.
7. Place the tool bag in the storage area.
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8. Use the wheel blocks (B) to secure the tool bag (A)
to the bracket.
9. Turn the retainer nut (C) clockwise to secure the
wheel blocks (B) and tool bag (A) into place.