Silverado SS AWD V8-6.0L VIN N (2003)
Electronic Throttle Control Module: Description and Operation
THROTTLE ACTUATOR CONTROL MODULE
The TAC module is the control center for the throttle actuator control system.
The TAC system is self-diagnosing and provides diagnostic information to the PCM through a dedicated serial data line.
The TAC achieves throttle positioning by providing a pulse width modulated voltage to the TAC as directed by the PCM.
