* Instrument Panel Cluster (IPC): Controls the gauges and warning lights. This module handles some aspects of body functions related to what the driver sees.
* Body Control Module (a more decentralized version): While not a single, all-encompassing BCM like in newer cars, there might be a module sometimes referred to as a BCM which handles functions for certain areas of the car. Its location and specific functions can vary based on options and features on the car.
* Powertrain Control Module (PCM): While primarily focused on the engine and transmission, the PCM interacts with other modules and might indirectly control some body functions.
* Various other modules: Depending on the Impala's options, there could be additional modules for things like power seats, windows, locks, etc., each controlling its own specific functions.
To find the location of a specific module related to a particular problem you're experiencing, you'll need to consult a repair manual specific to your 2000 Chevy Impala. These manuals usually have diagrams showing the location of all modules and their functions. You can find these manuals online or at auto parts stores.
In short: Don't expect to find one single "BCM" like in modern cars. The functions are spread out. Focus on identifying the specific body function malfunctioning to determine which module is at fault.
