WARNING: This page is about a different car, the 2008 Cadillac XLR. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground, and DLC
Courtesy of GENERAL MOTORS CORP.
Fig 2: Headlights/DRL and Exterior Lights References
Courtesy of GENERAL MOTORS CORP.
Fig 3: Exterior Lights Continued, Interior Lights, and Fog Lights References