Took my 2018 SLC 300 for a cruise today then parked in my garage. Came out an hour later and there was a cooling fan running under the hood, fine. But I heard this “clack clack” noise about every 30 seconds and want to know if this is normal. Best way to describe it is it sounds like when you would lock/unlock power door locks, like when they cycle. Relay? Not sure how to upload a video of it. Thanks!