WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Cooling Scan Tool Data List - Instrument Panel Cluster (IPC)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Engine Cooling Scan Tool Data List - Powertrain Control Module (PCM) 4.3 Liter LU3