Body Control Module Schematics
WARNING: This page is about a different car, the 2002 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Fig 5: Body Control Module Schematics (Instrument Panel Integration Module (IPM) Power, Ground & Serial Data)
Fig 6: Body Control Module Schematics (Instrument Panel Integration Module (IPM) - HVAC Inputs & Outputs)
Fig 7: Body Control Module Schematics (Instrument Panel Integration Module (IPM) - Inputs & Outputs)