GMC 1997 Safari 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. To raise the seatback, unlock the seatback latch by
pushing up on the latch release lever at the right rear
of the seat, while pushing down on the upper edge of
the seatback. Move the seatback into the upright
position. Make sure the seatback is locked when it is
back in the upright position.
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