WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Driver Information System Schematics (Driver Information Center (DIC) (W/O U40))
Courtesy of GENERAL MOTORS CORP.
Fig 2: Driver Information System Schematics (Driver Information Center (DIC) (W/U40))