Welcome. Yes GM has a bulletin for this issue, and the first thing to try is cleaning the throttle plates and relearn the throttle position. After that, if it does not work, then you may need to try something else, but this is the cheapest and best place to begin.
Important: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM can continue to learn.