See also:

Vehicle storage
If you plan on storing your vehicle for an extended period of time (30 days or more), refer to the following maintenance recommendations to ensure your vehicle stays in good operating condition. ...

Special operating condition log
...

Opening the power liftgate
Press twice within three seconds to fully unlatch and open the liftgate. WARNING: Make sure all persons are clear of the liftgate area before using power liftgate control. In order to fully l ...