Oldsmobile 2000 Silhouette Owner's Manual page 28

Adjusting the Bucket Seats
There are two adjustment levers on each seat to adjust
the seat forward or rearward.
One is located below the center, in front of the
bucket seat.
1-16
Lift up either lever and slide the seat forward to allow
for extra storage behind the seat, or slide the seat back to
allow extra room for passengers.
Release the lever. Push and pull on the seat to be sure it
is locked into place.
The other lever is located on
the rear of the bucket seat.