WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Starting System, Clutch Pedal Position (CPP) Switch Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: Vehicle Speed Input Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 3: Backup Lamp Switch, Cruise Control Release Switch Schematic