WARNING: This page is about a different car, the 2002 Cadillac Seville. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Headrest Motor - Driver
Courtesy of GENERAL MOTORS CORP.
Fig 2: Headrest Motor - Front Passenger
Courtesy of GENERAL MOTORS CORP.
Fig 3: Headrest Position Sensor - Driver
Courtesy of GENERAL MOTORS CORP.
Fig 4: Heated Seat Cushion Element - Front Passenger