Lockout Protection; Liftgate/Liftglass - GMC 2009 Yukon XL Owner's Manual

When you want to open a rear door when the security
lock is on, do the following:
1. Unlock the door by lifting the rear door manual lock,
using the power door lock switch, or the Remote
Keyless Entry (RKE) transmitter, if the vehicle
has one.
2. Open the door from the outside.
To cancel the rear door security lock, do the following:
1. Unlock the door and open it from the outside.
2. Insert the key into the security lock slot and turn it
so the slot is in the vertical position.

Lockout Protection

This feature protects you from locking the key in the
vehicle when the key is in the ignition and a front door
is open.
If the driver's side power door lock switch is pressed
when the driver's door is open and the key is in
the ignition, all of the doors will lock and then the driver's
door will unlock.
If the passenger's side power door lock switch is
pressed when the front passenger's door is open and
the key is in the ignition, all of the doors will lock
and then the front passenger's door will unlock.
2-12

Liftgate/Liftglass

CAUTION:
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It can be dangerous to drive with the liftglass or
liftgate open because carbon monoxide (CO) gas
can come into your vehicle. You cannot see or
smell CO. It can cause unconsciousness and even
death.
If you must drive with the liftglass or liftgate open, or
if electrical wiring or other cable connections must
pass through the seal between the body and the
liftglass or liftgate:
•
Make sure all other windows are shut.
•
Turn the fan on your heating or cooling system
to its highest speed with the recirculation mode
off. That will force outside air into your vehicle.
See Climate Control System on page 3-22 or
Dual Automatic Climate Control System on
page 3-25.
•
If you have air outlets on or under the
instrument panel, open them all the way.
•
If your vehicle has a power liftgate, disable the
power liftgate function.
See Engine Exhaust on page 2-46.