WARNING: This page is about a different car, the 2008 Pontiac Torrent and 2008 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power and Ground, Starting and Charging
Courtesy of GENERAL MOTORS CORP.
Fig 2: Exterior Lights, Radio, ABS, Automatic Transmission and Data Communications