Body Control System Schematics (Power, Ground, and References)
WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Body Control System Schematics (Power, Ground, And References)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Body Control System Schematics (Lighting, Door Locks, And Horn References)