The most important one, controlling the engine and transmission, is usually located somewhere in the engine compartment, often near the firewall or under the dashboard, but its exact location varies. There are also modules for things like the body control, anti-lock brakes (ABS), and airbags, all in different locations. You would need a wiring diagram specific to the 2000 Chevy Venture to pinpoint each module.
To find specific modules, you'll need a repair manual or a wiring diagram for your specific year and model. These are usually available online or from auto parts stores. Without a diagram, pinpointing the location of the different control modules is difficult and requires a detailed search of the vehicle's electrical system.
