Throttle or Idle Learn (LGX): Description
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
For an overview of the component/system, refer to: Throttle Actuator Control (TAC) System Description
This procedure resets the control module learned values of the component/system: Q38 Throttle Body - Airflow Adaptive Values