WARNING: This page is about a different car, the 2003 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Dash Integration Module (DIM) Scan Tool Data List
Courtesy of GENERAL MOTORS CORP.
Fig 2: Engine Control Module (ECM) Scan Tool Data List
Courtesy of GENERAL MOTORS CORP.
Fig 3: Vehicle Theft Deterrent (VTD) Scan Tool Data List