Hummer 2003 H2 Owner's Manual page 15

To fold the rear seat, do the following:
1. Insert the two safety belt buckles into the pockets on
the driver's side seatback and place the passenger's
side seat belt through the loop located near the
armrest before folding the rear seat.
That way, the buckles will be out of the way when
the seat is folded and will be available for passengers
to use when the seat is returned to the passenger
position. Also, make sure that nothing is under or
in front of the seat.
3. Pull the seatback forward and fold it down until it
is flat.
2. Pull up on the strap loop
located at the rear of the
seat cushion and pull
the seat cushion up.
Then fold it forward.
The rear seatbacks are equipped with rearward folding
head restraints. When the seatback is being folded down,
the head restraint will automatically fold rearward.
If the seatback cannot fold flat because it interferes with
the cushion, try moving the front seat forward and/or
bringing the front seatback more upright.
Returning the Seats to an Upright Position
To return the seat to the upright position, do the
following:
1. Lift the seatback up and push it rearward all the way.
2. Lower the seat cushion until it latches into position.
3. Pull forward on the seatback and up on the seat
cushion to make sure the seat is securely in place.
4. Return the head restraints to the upright position.
5. Check to see that the safety belt buckles on the
driver's side seatback are accessible to the outboard
and center occupants and are not under the seat
cushions.
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