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: Body Control Module (BCM)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Electronic Brake Control Module (EBCM) - (1 Of 2)
Courtesy of GENERAL MOTORS CORP.
Fig 3: Electronic Brake Control Module (EBCM) - (2 Of 2)