WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Upfitter Provisions Schematics - Power Windows (V4U)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Upfitter Provisions Schematics - Rear Door Latch (B9Q)