GMC 2010 Yukon XL Denali Owner's Manual page 12

Liftgate
Power Liftgate
Use the Remote Keyless Entry (RKE) transmitter or the
power door lock switches to unlock the liftgate.
1-6
There are several ways to open and close the power
liftgate:
Press and hold
the liftgate starts moving.
Press on the overhead console inside the
vehicle.
Press the touchpad switch (B) on the outside
liftgate handle to open.
Press the button next to the liftgate latch to
close.
To disable the power liftgate function, press OFF on the
overhead console.
Liftglass
There are two ways to unlatch the liftglass:
Press the button on the underside of the underside
of the license plate applique (A).
Press on the RKE transmitter.
on the RKE transmitter until