Buick 2016 Envision Owner's Manual page 41

40 Keys, Doors, and Windows
Length of Kick Zone
To operate, kick your foot straight up
in one swift motion under the left
corner of the rear bumper, then pull
it back.
Caution
Splashing water may cause the
liftgate to open. Keep the RKE
transmitter away from the rear
bumper detection area or turn the
liftgate mode to OFF when
cleaning or working near the rear
bumper to avoid accidental
opening.
Do not sweep your foot side
to side.
Do not keep your foot under the
bumper; the liftgate will not
activate.
Do not touch the liftgate until it
has stopped moving.
This feature may temporarily be
disabled under some conditions.
If the liftgate does not respond to
the kick, open or close the
liftgate by another method or
start the vehicle. The feature will
be re-enabled.
When closing the liftgate using this
feature, there will be a short delay.
The rear lights will flash and a
chime will sound. Step away from
the liftgate before it starts moving.