Chevrolet 2006 Express Van Owner's Manual page 10

Move the seatback to the desired position and release
the lever to lock the seatback.
CAUTION:
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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.
Lean forward and pull up on the front of the lever and
the seatback will go to an upright position.
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