Interesting, I was parked on the street in DC this weekend and of course the Shift to Park came on so now my lights wouldn't go off until I manually turned them off. Unfortunately the auxiliary power stayed on, don't know how long that stays on but at least I didn't have to experience a dead battery on a Sunday in Washington DC.Just an update I found out if you turn the headlight switch to manual on BEFORE you turn off the vehicle, the Shift to Park will not appear 99.9% of the time. Hope it helps so other Acadia owners won’t have a dead battery since the vehicle will turn off the headlight even you forgot to turn it off.
I have found that when I open the back door before I start the car and I park it I get the "rear message" so I'm wondering if that trumps the shift to park message. There are no issues locking the vehicle so I have also been doing that even when I don't have anything to put in the back seat, along with the wiggle tip.
It looks like we have all found some sort of trick to trump the park debacle.
Good luck to all