Where is the 2012 chevy impala transmission control module located?

The 2012 Chevy Impala's TCM or transmission control module can be located on top of the transmission, accessible from the engine bay under hood, toward the front and passenger's side of the vehicle. To remove, use 8mm and 10mm sockets. The TCM is responsible for managing the shifting of the car using data collected from the engine's various sensors including the throttle position sensor, rotary speed sensor and coolant temperature sensor. The unit also sends OBD-II error codes to the vehicle's main computer that illuminate the "check engine" light. If the module is going bad, You will notice uneven shifting, getting stuck in gear, illuminated warning lights and a reduction in fuel economy. The cost to replace the TCM on a Chevy Impala average $550-$600 in parts and labor.