NHTSA Complaint #11443003 — 2017 GMC ACADIA

Vehicle is a 2017 Acadia Denali with ~39,000 miles. The problem started without any symptoms or warnings in October 2021. The dash gives a "Shift to Park" message when the shift is moved to the Park position and the driver attempts (to turn all systems off so as) to park and exit the vehicle. When the Off button is pushed, the "Shift to Park" message displays. The engine does turn off, but the lighting, radio, etc. stay on. When opening the door, the vehicle emits tone(s) suggesting the driver is trying to leave the vehicle while it's running and/or has left electrical systems on. Driver is actually attempting to simply turn everything off and park the vehicle. The fact that all the lighting and radio stay on runs down the battery, potentially leaving the driver stranded.