Throttle Actuator Control System
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The Throttle Actuator Control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the accelerator pedal position sensing, throttle positioning to meet driver and engine demands, throttle position sensing, internal diagnostics, cruise control functions and manage TAC electrical power consumption.
The TAC system components include the Accelerator Pedal Position (APP) sensors, throttle body assembly, throttle actuator control module and the PCM. See Fig 1 .