Owners guide pgs 76-77, excerpt here:
Switching the Power Liftgate On
or Off
You can switch the power liftgate on or off
through the vehicle settings on your
touchscreen.
When switched off, the liftgate only
unlatches and will not power open or close.
Hands-Free Feature (If Equipped)
Make sure you have the passive key within
3 ft (1 m) of the liftgate.
1. Stand behind your vehicle, and face the
liftgate.
2. Move your foot, in a single-kick motion,
without pausing, under and away... (see manual for rest)