WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Instrument Panel Cluster (IPC) Scan Tool Data List
Courtesy of GENERAL MOTORS CORP.
Fig 2: Powertrain Control Module (PCM) 3.1 Liter (LG8) Scan Tool Data List
Courtesy of GENERAL MOTORS CORP.
Fig 3: Powertrain Control Module (PCM) 3.8 Liter (L36, L67) Scan Tool Data List