WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Body Control Module (BCM) C1 Connector End View
Courtesy of GENERAL MOTORS CORP.
Fig 2: Body Control Module (BCM) C2 Connector End View
Courtesy of GENERAL MOTORS CORP.
Fig 3: Body Control Module (BCM) C3 Connector End View
Courtesy of GENERAL MOTORS CORP.
Fig 4: Body Control Module (BCM) C4 Connector End View