What is the 2003 Chevy silverado tac module location?

The TAC module on the 2003 Chevy Silverado is mounted on the driver's side firewall under the corner brace. The Throttle Actuator Control (TAC) Module is the brain behind the Electronic Throttle Control System.Common signs Your TAC module is failing include lacking power when accelerating, rough or slow idle, stalling, inability to shift up, and the Check Engine Light coming on. The PCM and TAC module must be powered and shutdown together. A power-train control module, abbreviated PCM, is an automotive component, a control unit, used on motor vehicles. It is generally a combined controller consisting of the engine control unit (ECU) and the transmission control unit (TCU).