Oldsmobile 2000 Silhouette Owner's Manual page 31

Make sure the seat is in the full rear position before
beginning this procedure.
1. With the seat folded, squeeze the angled bar toward
the solid crossbar while placing the front hooks of
the bucket seat onto the front two floor pins.
2. Make sure the bucket seat is angled so that the front
hooks clear the floor pins. If the front legs are not
attached correctly, the rear legs will not attach to the
rear set of floor pins.
If the front latches are not attaching correctly, check
that the seat is in the full rear position.
3. Firmly push the rear hooks onto the rear floor pins
by pushing down on the rear of the seat.
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