High rpm at cold start


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Hey have a 2016 Equinox LS awd 2.1 L. Never did this before but now on cold starts after the car has been sitting a few hours I will get an idle around 1200-1300 rpms for about 20- 30 seconds then drops to about 900. Fluctuates slightly afterward. Vacuum leak ? Oil is clean and looks ok.

Thanks in advance

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