Hummer 2003 H2 Owner's Manual page 21

Entering or Exiting the Third Row Seat
CAUTION:
If the seatback isn't locked, it could move forward
in a sudden stop or crash. That could cause injury
to the person sitting there. Always press rearward
on the seatback to be sure it is locked.
To enter or exit the third row seat you must fold the
second row seat down following the instructions given
previously. If you are exiting the third row seat with no
assistance do the following:
2. Push the seat cushion forward.
3. Next, push the seatback forward until it is level with
the floor.
Be sure to return the seat to the passenger position when
finished. Pull forward and push rearward on the seat to
make sure it is locked in place.
1. Reach over the second
row seat and pull up on
the strap loop. Then pull
the seat cushion up.
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