July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Cellular Communication Connector End Views (F1)
WARNING: This page is about a different car, the 2002 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Vehicle Communication Interface Module (VCIM) C1
Courtesy of GENERAL MOTORS CORP.
Fig 2: Vehicle Communication Interface Module (VCIM) C2