WARNING: This page is about a different car, the 2008 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Powertrain Control Module, Stop Lamp Switch and Cruise Control Switch Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: Powertrain Control Module, Cruise Control Release Switch, Cruise Indicator Schematic