GMC Yukon XL Denali Owner's Manual page 43

There are several ways to open and
close the power liftgate:
8
Press and hold
RKEtransmitter until the liftgate
starts moving.
8
Press on the overhead
console.
Press on the bottom of the
liftgate next to the latch to close.
Pressing a second time while the
liftgate is moving reverses the
direction.
To disable the power liftgate
function, press OFF on the liftgate
switch.
The power liftgate may be
temporarily disabled under extreme
temperatures, or under low battery
conditions. If this occurs, the liftgate
can still be operated manually.
If the transmission is shifted out of
P (Park) while the power function is
in progress, the liftgate power
function will continue to completion.
If the transmission is shifted out of
P (Park) and the vehicle accelerates
before the power liftgate latches
on the
closed, the liftgate may reverse to
the open position. Cargo could fall
out of the vehicle. Always make
sure the power liftgate is closed and
latched before driving away.
If the liftgate is opened using power
operation and the liftgate support
struts have lost pressure, the turn
signals flash and a chime will
sound. The liftgate stays open
temporarily, and then slowly closes.
See a dealer for service before
using the liftgate.
Obstacle Detection Features
If the liftgate encounters an obstacle
during a power open or close cycle,
a warning chime will sound and the
liftgate will automatically reverse
direction to the full closed or open
position. After removing the
obstruction, the power liftgate
operation can be used again.
Keys, Doors, and Windows
If the liftgate encounters multiple
obstacles on the same power cycle,
the power function will deactivate
and a message will display in the
Driver Information Center (DIC), see
Object Detection System Messages
on page 5 40. After removing the
obstructions, the liftgate will resume
normal power operation.
Pinch sensors are located on the
side edges of the liftgate. If an
object is caught between the liftgate
and the vehicle 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.
Manual Operation of Power
Liftgate
To change the liftgate to manual
operation, press OFF on the liftgate
switch.
With the power liftgate disabled and
all of the doors unlocked, the liftgate
can be manually opened and
closed.
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