Rear Door Security Locks; Lockout Protection - GMC 2008 Yukon Denali Owner's Manual

Rear Door Security Locks

Your vehicle has rear door security locks. These prevent
passengers from opening the rear doors from the inside.
Security Lock Label
shown
The rear doors must be open to access them. The
label showing lock and unlock positions is located near
the lock.
To set the locks, do the following:
1. Insert the key into the security lock slot and turn it
so the slot is in the horizontal position.
2. Close the door.
2-12
The rear door security
locks are located on the
inside edge of each
rear door.
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.