Throttle Actuator Control (TAC) System Description: Notes
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
| Callout | Component Name |
|---|---|
| 1 | Throttle Actuator Control (TAC) Module |
| 2 | Throttle Body Assembly |
| 3 | Accelerator Pedal Position (APP) Sensor |
The throttle actuator control (TAC) system uses vehicle electronics and components to calculate and control the position of the throttle blade. This eliminates the need for a mechanical cable attachment from the accelerator pedal to the throttle body. This system also performs the cruise control functions as well.
The TAC system components include the following:
- The accelerator pedal position (APP) sensor
- The throttle body
- The throttle actuator control (TAC) module
- The powertrain control module (PCM)
Each of these components interface together to ensure accurate calculations and control of the throttle position.