GMC 2007 Acadia Owner's Manual page 113

Your vehicle has pinch sensors located on the
side edges of the liftgate. If an object is caught
between the liftgate and the body and presses
against this sensor, the liftgate will reverse
direction and open fully. The liftgate will remain
open until it is activated again or closed manually.
Do not force the liftgate open or closed during
a power cycle.
Manual Operation of Power Liftgate
With the power liftgate disabled and all of the
doors unlocked, the liftgate can be manually
opened and closed.
To change the liftgate to
manual operation,
toggle the switch on the
center console to the
disable position
indicated by a circle.
To open the liftgate, press the touchpad on the
handle on the outside of the liftgate, and lift
the gate open. To close the liftgate, use the pull
cup or pull strap to lower the liftgate and close.
The liftgate latch will power close. Always close the
liftgate before driving.
If the RKE button or the power close button on the
liftgate is pressed while power operation is
disabled, the lights will flash three times, but the
liftgate will not move.
It is not recommended that you drive with the
liftgate open, however, if you must drive with the
liftgate open, the liftgate should be set to manual
operation — the center console switch set to the
disable position.
The liftgate has an electric latch. If the battery is
disconnected or has low voltage, the liftgate
will not open. The liftgate will resume operation
when the battery is reconnected and charged.
If the battery is properly connected with adequate
voltage, the switch is not disabled, and the liftgate
still will not function, your vehicle should be taken to
a dealer/retailer for service.
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