Power Seat; Reclining Seatbacks - GMC 2003 Savana Owner's Manual

Power Seat

If your vehicle has a power seat on the driver's or
passenger's side, you can adjust it with these controls
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.
To raise or lower the front of the seat cushion, move the
right lever up or down. To raise or lower the rear of
the seat cushion, move the left lever up or down.
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Reclining Seatbacks

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