Hummer H2 2009 Owner's Manual page 22

4. Squeeze the release handle while pulling the seat
out of the slots on the floor.
5. Roll the seat out of the vehicle while holding the
rear of the seat up.
1-18
Installing the Seat
CAUTION:
{
If either 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 seatbacks to be sure they
are locked.
CAUTION:
{
A seat that is not locked into place properly
can move around in a collision or sudden stop.
People in the vehicle could be injured. Be sure
to lock the seat into place properly when
installing it.