If you lock the truck with the fob or the key pad you can go to mailbox with the truck running. Or go into store or whatever. I don't remember if it will shut off after the max idle time whatever you have that set at expired.When I stop at the mailbox, put truck in P, unbuckle seat belt, open door, get out to get mail if I close the door it double honks with fob in my pocket. If I leave door open with fob in pocket silence. I assumed (yes I know what that makes me, I won't infer it does the same to you) it was to alert me that I left the vehicle running and exited the vehicle. It seems to be programmed that if the door remains open to think you are coming back.
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