Chevrolet express 2001 用户手册

If your vehicle has a power seat on the driver’s or
passenger’s side, you can adjust it with these switches
located at the front center of the seat cushion.

To raise or lower the seat, move the center knob up or
down. To move the seat forward or rearward, move the
center knob toward the right or left.

You can raise and lower the front and rear of the seat. 
To raise or lower the front of the seat, move the right
lever up or down. To raise or lower the rear of the seat,
move the left lever up or down.

To adjust the seatback, lift the front of the lever, which
is located at the inboard side of the seat cushion.

Move the seatback with your body and release the lever
to lock the seatback where you want it. Lean forward
and pull up on the front of the lever and the seatback
will go to an upright position.