I've had my new 22 1500 Laramie for 2 weeks now. I've been off for the holidays until this week. Both yesterday and today I've heard a 3 ding audible warning sound on my way to and from work. It's kinda a double ding sound like da-ding, da-ding, da-ding. (i hate describing sounds in written text) It seems to happen in the same location each time. And it's usually 3 higher pitched dings, followed by 3 lower pitched dings several moments later. I'm not seeing any corresponding warnings or messages in the dash or radio. Any idea what these mean? I don't even know what to search for.