Hummer 2005 H2 Owner's Manual page 20

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3. To unlatch the rear of
the seat from the floor,
pull up on the release
lever labeled 2, at the
rear of the seat, and lift
the rear of the seat up
from the floor.
4. Squeeze the release handle while pulling the seat
out of the slots on the floor.
5. While holding the rear of the seat up, roll the seat
out of the vehicle.