Hummer 2007 H2 Owner's Manual page 19

Returning the Seat from a Tilted to an
Upright Position
CAUTION:
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If the seatback is not locked, it could
move forward in a sudden stop or crash.
That could cause injury to the person
sitting there. Always push and pull on the
seatback to be sure it is locked.
To return the seatback to an upright position, do
the following:
1. Pull the lever labeled 3 toward you.
2. While still holding lever 3 toward you, grasp
the top of the seat and pull it toward you
slightly.
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