FORD 2003 F-550 v.1 - Manual (Page 66)

Adjusting the front power seat (if equipped)
The control is located on the outboard side of the seat cushion.
Press to raise or lower the front
portion of the seat cushion.
Press to raise or lower the rear
portion of the seat cushion.
Press the control to move the seat
forward, backward, up or down.
Seating and Safety Restraints
66