I have the same problem and my Journey only has 2100kms on it. It must be a normal thing. I think that if I took it into the dealer they would look at me funny say something just to make me happy and kick me out the door. Has anyone out there found a solution to this?
I used to own a 1998 Saturn SL2 and had the same problem. I replaced the alternator - no change. I then changed the battery and that is what made a difference. But I can't think that my battery would be shot after only owning the vehicle for a month or so. The manufacture date is 12/09. So I wouldn't think that it the battery is the problem, but hey, you never know.