Hummer H2 2010 Owner's Manual page 49

To fold the rear seat:
1. Make sure that nothing is under or in front of
the seat.
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.
2. Pull up on the strap
loop located at the rear
of the seat cushion and
pull the seat cushion
up and fold it forward.
3. Pull the seatback forward and fold it down until it
is flat.
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.
4. Repeat the steps for the other half of the split
bench seat.
WARNING:
Using the third row seating position while the
second row is folded, or folded and tumbled, could
cause injury in a sudden stop or crash. Be sure to
return the seat to the passenger seating position.
Push and pull on the seat to make sure it is
locked into place.
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