GMC 1995 Safari Owner's Manual page 19

To Install The Seat
1. Lower the seat into position. Make sure the front retainers are hooked
onto the anchor pins. Pull the seat down to latch the rear retainers.
Make sure the seat is locked in by pulling up and down on the seat.
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2. Raise the seatback by pushing forward on the latch at the right rear of
the seat. Pull up on the seatback until it is locked securely in the up
position.
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