Hummer 2008 H3 Owner's Manual page 13

3. Pull the cushion forward until it rests in the footwell.
Notice: Folding a rear seat with the safety belts
still fastened may cause damage to the seat or the
safety belts. Always unbuckle the safety belts
and return them to their normal stowed position
before folding a rear seat.
4. Lift the latch on top of the seatback and pull the
seatback forward. Fold the seatback down until it
is nearly flat.
5. If the seatback will not fold nearly flat, try moving
the front seat forward and/or moving the front
seatback more upright.
6. Repeat the steps for the other half of the 60/40 split
bench seat.
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