What do I do if my 2005 Buick rendezvous won’t stop idling super high?

What is your question?

Sporadically the car will start idling super high. Eventually it stops usually about a coup hours. It seems to stop once it’s in gear and driving. However sometimes it continues.

What makes this problem better or worse?

I’m not sure

How long has your 2005 Buick Rendezvous had this problem?

Q mr QSporadically for about 2 months