* Body Control Module (BCM): Controls many interior functions like power windows, locks, lighting, and sometimes even the radio.
* Powertrain Control Module (PCM): The "brain" of the engine and transmission, controlling fuel injection, ignition timing, and transmission shifting. Often called the Engine Control Module (ECM) in other vehicles.
* Transmission Control Module (TCM): Specifically manages the automatic transmission's operation (separate from the PCM in some years and models).
* Anti-lock Brake System (ABS) Module: Controls the anti-lock braking system.
* Airbag Control Module (ACM): Manages the deployment of airbags.
* Tire Pressure Monitoring System (TPMS) Module: Monitors tire pressure and alerts the driver if it's low.
There are other modules possible depending on the specific options and features of the truck. Each module has a specific function and communicates with other modules via a network (like a CAN bus). Problems with a module can lead to a variety of malfunctions, requiring diagnostic tools to pinpoint the issue.
