Third Row Seats; Unfolding The Seatback - Hummer 2004 H2 Owner's Manual

Third Row Seats

If your vehicle has a third row seat, the seatback can be
folded and the entire seat tilted or removed from the
vehicle.
Folding the Seatback
To fold the seatback, do the following:
1-10
1. Pull up on the release
lever, labeled 1,
located on the rear of
the seatback, and
push the seatback
forward.

Unfolding the Seatback

CAUTION:
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If the seatback isn't locked, it could move
forward in a sudden stop or crash. That could
cause injury to the person sitting there. Always
press rearward on the seatback to be sure it is
locked.