Chevrolet 1997 Astro Owner's Manual page 19

Replacing the Rear Seats
To replace the rear seats, do the following:
1 . Lower the seat into position. Make sure the front
retainers are hooked onto the anchor pins.
2.
Pull the seat down to latch the rear retainers. Make
sure the seat is locked in by pulling up and down on
the seat.
3. Raise the seatback by pushing forward on the latch at
the right rear of the seat, while pushing down on the
upper edge of the seatback. Pull up on the seatback
until it is locked securely in the up position.
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