Hummer 2006 H2 Owner's Manual page 18

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.
1-12
Reinstalling the Seat
CAUTION:
{
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.
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.