Hummer 2005 H2 - Manual (Page 17)

To return the seatback to the passenger position, do the
following:
1. Pull up on the release
lever labeled 1 and
then pull up on
the seatback until the
seatback locks into
the upright position.
2. Push forward on the seatback to make sure it is
locked into position.
Tilting the Seat
1. Fold the seatback forward using the instructions
listed previously.
2. Unlatch the seat from
the floor by pulling up
on the lever labeled 2,
located on the rear
of the seat.
3. Lift the rear of the seat up from the floor and push it
forward until it locks into place. You will not be able
to unlatch the seat from the floor unless the
seatback is folded down.
The seat will now remain locked in the upright position.
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