WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. 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: Instrument Panel Module (IPM) Scan Tool Data List
Courtesy of GENERAL MOTORS CORP.
Fig 3: Rear Integration Module (RIM) Scan Tool Data List (1 Of 2)
Courtesy of GENERAL MOTORS CORP.
Fig 4: Rear Integration Module (RIM) Scan Tool Data List (2 Of 2)