GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - CRC - 2/18/20
18
Keys, Doors, and Windows
This can be manually overridden by pressing
and holding
Q
on the power door lock
switch.
Safety Locks
The rear door safety locks prevent
passengers from opening the rear doors
from inside the vehicle.
The safety lock is on the inside edge of the
rear doors. To use the safety lock:
1. Move the lever down to the lock
position.
2. Close the door.
3. Do the same for the other rear door.
To open a rear door when the safety lock
is on:
1. Unlock the door by activating the inside
handle, by pressing the power door
unlock switch, or by using the
remote key.
2. Open the door from the outside.
When the safety lock is enabled, adults and
older children will not be able to open the
rear door from the inside. Cancel the safety
locks to enable the doors to open from the
inside.
To cancel the safety lock:
1. Unlock the door and open it from the
outside.
2. Move the lever up to unlock. Do the
same for the other door.
Doors
Liftgate
{
Warning
Exhaust gases can enter the vehicle if it
is driven with the liftgate or trunk/hatch
open, or with any objects that pass
(Continued)
Warning (Continued)
through the seal between the body and
the trunk/hatch or liftgate. Engine
exhaust contains carbon monoxide (CO)
which cannot be seen or smelled. It can
cause unconsciousness and even death.
If the vehicle must be driven with the
liftgate or trunk/hatch open:
.
Close all of the windows.
.
Fully open the air outlets on or under
the instrument panel.
.
Adjust the climate control system to a
setting that brings in only outside air
and set the fan speed to the highest
setting. See
“
Climate Control Systems
”
in the Index.
.
If the vehicle is equipped with a
power liftgate, disable the power
liftgate function.
See
