Yukon/Denali 4WD V8-4.8L VIN V (2005)
Electronic Throttle Control Module: Description and Operation
THROTTLE ACTUATOR CONTROL MODULE
The throttle actuator control (TAC) module is the control center for the throttle actuator control system. The TAC system is self-diagnosing and provides
diagnostic information to the powertrain control module (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.
