Throttle Actuator Control (TAC) Module
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2000 GMC Yukon XL, 2000 GMC Yukon, 2000 GMC Sierra, 2000 Chevrolet Tahoe, and 2000 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
Throttle Actuator Control (TAC) module communicates with Powertrain Control Module (PCM) through serial data network. TAC module receives cruise control related inputs from cruise control functional switches, brakelight switch, Throttle Position (TP) sensor and Accelerator Pedal Position (APP) sensor. Using information from the various sensors, PCM sends command through TAC module to TAC motor to enable or inhibit cruise function.