WARNING: This page is about a different car, the 2007 Saturn Ion Red Line, 2007 Saturn Ion 3, and 2007 Saturn Ion 2. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Park/Turn Signal Lamp Bulb
Courtesy of GENERAL MOTORS CORP.
Install the park/turn bulb into the socket.
Install the park/turn bulb/socket into the headlamp housing by rotating the socket clockwise.