WARNING: This page is about a different car, the 2002 GMC Safari, 2002 Chevrolet Astro, 2001 GMC Safari, and 2001 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Scan Tool Data List - Body Control Module (BCM)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Scan Tool Data List - Powertrain Control Module (PCM)