Page 146 of 630

Delayed Locking
The vehicle may have the delayed locking feature.
When locking the doors with the power lock switch and
a door is open, the doors will lock five seconds after the
last door is closed. You will hear three chimes to signal
that the delayed locking feature is in use.
Pressing the power lock switch twice will override the
delayed locking feature and immediately lock all the
doors.
This feature will not operate if the key is in the ignition.
You can program this feature using the Driver
Information Center (DIC). See DELAY DOOR LOCK
underDIC Vehicle Customization (With DIC Buttons)
on
page 4‑75.
Programmable Automatic Door
Locks
Vehicles with an automatic lock/unlock feature enable
you to program the vehicle's power door locks. You can
program this feature through the Driver Information
Center (DIC). See DIC Vehicle Customization (With DIC
Buttons)
on page 4‑75for more information on DIC
programming.
Rear Door Security Locks
Your vehicle has rear door security locks. These
prevent passengers from opening the rear doors from
the inside.
The rear door security
locks are located on the
inside edge of each
rear door.
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.
3-10
Page 147 of 630

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.
Rear Doors
Extended Cab
Your vehicle may have a rear access door(s) that allows
easier access to the rear area of the extended cab.
To open a rear access
door from the outside, first
open the front door. Then,
use the handle located on
the front edge of the rear
access door to open it.
You must fully close a rear access door before you can
close the front door.
3-11
Page 148 of 630

To open a rear access
door from the inside,
the front door must be
opened first. Then, use
the handle located on the
inside of the rear access
door to open.
Crew Cabs
If your vehicle is a crew cab, you can open your doors
from the inside or outside. Your vehicle may also have a
feature which prevents children from opening the rear
doors. SeeRear Door Security Locks
on page 3‑10for
more information.
Tailgate
{WARNING:
It is extremely dangerous to ride on the tailgate,
even when the vehicle is operated at low speeds.
People riding on the tailgate can easily lose
their balance and fall in response to vehicle
maneuvers. Falling from a moving vehicle may
result in serious injuries or death. Do not allow
people to ride on the tailgate. Be sure everyone in
your vehicle is in a seat and using a safety belt
properly.
On vehicles with a lock on the tailgate, use the key to
lock or unlock the tailgate.
Open the tailgate by lifting up on its handle while pulling
the tailgate toward you.
To shut the tailgate, firmly push it upward until it latches.
After you put the tailgate back up, pull it back towards
you to be sure it latches securely.
3-12
Page 151 of 630

Manual Windows
Turn the hand crank on each door to manually raise or
lower the manual windows.
Power Windows
{WARNING:
Leaving children in a vehicle with the keys is
dangerous for many reasons, children or others
could be badly injured or even killed. They could
operate the power windows or other controls or
even make the vehicle move. The windows will
function and they could be seriously injured or
killed if caught in the path of a closing window.
Do not leave keys in a vehicle with children.
When there are children in the rear seat use the
window lockout button to prevent unintentional
operation of the windows.
Crew Cab shown
If your vehicle has power windows, the controls are
located on each of the side doors in the front and rear
for crew cab and extended cab models.
The driver's door has a switch for the passenger's and
rear windows as well. Your power windows will work
when the ignition has been turned to ACCESSORY or
RUN or when Retained Accessory Power (RAP) is
active. See Retained Accessory Power (RAP)
on
page 3‑23.
Press the switch down to lower the window, and pull up
the front of the switch to raise the window.
3-15
Page 152 of 630

Express Down Windows
Vehicles with the express down feature allow the driver
and front passenger windows to be lowered without
holding the switch. Press down fully on the window
switch, then release, to activate the express down
mode. The express down mode can be canceled at any
time by pulling up on the switch. To open the window
partway, press the switch to the first depression
position, until the window is at the desired position.
Window Lockout
o(Window Lockout) : If your crew cab or extended
cab vehicle has power windows, the driver's door power
window switch has a lockout feature. The lockout switch
is located in front of the window switches. This feature
prevents the rear windows from operating, except from
the driver's position. Press the switch to engage or
disengage the lockout feature. An indicator light on the
switch will come on when the lockout feature is
engaged, and will go off when disengaged.
Power Sliding Rear Window
On vehicles with a power
sliding rear window,
the switch is located in
the overhead console.
The power sliding rear window works when the ignition
has been turned to ACC/ACCESSORY, ON/RUN,
or when Retained Accessory Power (RAP) is active.
See Retained Accessory Power (RAP)
on page 3‑23for more information.
The power sliding rear window cannot be operated
manually.
T:Push to open the window.
S :Pull to close the window.
3-16
Page 153 of 630

Sun Visors
Pull the sun visor down to block glare. Swing the sun
visor to the side to cover the side window.
The passenger's side sun visor may have a vanity
mirror.
Theft-Deterrent Systems
Vehicle theft is big business, especially in some cities.
This vehicle has theft-deterrent features, however, they
do not make it impossible to steal.
Content Theft-Deterrent
Your vehicle may have a content theft-deterrent alarm
system.
This is the security light.To arm the theft-deterrent system:
1. Open the door.
2. Lock the door with the Remote Keyless Entry (RKE) transmitter. The security light should come
on and flash.
If the delayed locking feature is active, the alarm
will not be activated until all doors are closed and
the security light goes off.
3. Close all doors. The security light will stop flashing and go off after approximately 30 seconds. The
content theft deterrent alarm is not armed until the
security light goes off.
If a locked driver door is opened without using the RKE
transmitter, a ten second pre-alarm will occur. The horn
will chirp and the lights will flash. If the key is not placed
in the ignition and turned to START or the door is not
unlocked by pressing the unlock button on the RKE
transmitter during the ten second pre-alarm, the alarm
will go off. Your vehicle's headlamps will flash and the
horn will sound for about 30 seconds, then will turn off
to save the battery power.
3-17
Page 154 of 630

The theft-deterrent system will not activate if the doors
are locked with the vehicle's key or the manual door
lock. It activates only if you use the power door lock
switch with the door open or the RKE transmitter.
You should also remember that you can start your
vehicle with the correct ignition key if the alarm has
been set off.
To avoid setting off the alarm by accident:
.If you do not want to activate the theft-deterrent
system, the vehicle should be locked with the door
key after the doors are closed.
.Always unlock a door with the RKE transmitter.
Unlocking a door any other way will set off the
alarm if the system has been armed.
If you set off the alarm by accident, press unlock on the
RKE transmitter or place the key in the ignition and turn
it to START to turn it off.
Testing the Alarm
To test the alarm: 1. From inside the vehicle, lower the driver's window and open the driver's door.
2. Activate the system by locking the doors with the RKE transmitter.
3. Get out of the vehicle, close the door and wait for the security light to go out.
4. Then reach in through the window, unlock the door with the manual door lock and open the door.
This should set off the alarm.
If the alarm does not sound when it should but the
headlamps flash, check to see if the horn works.
The horn fuse may be blown. To replace the fuse,
see Fuses and Circuit Breakers on page 6‑118.
If the alarm does not sound or the headlamps do not
flash, see your dealer/retailer for service.
3-18
Page 159 of 630

D (START) :This is the position that starts the engine.
When the engine starts, release the key. The ignition
switch returns to ON/RUN for driving.
A warning tone will sound when the driver door is
opened, the ignition is in ACC/ACCESSORY or
LOCK/OFF and the key is in the ignition.
Retained Accessory Power (RAP)
The following vehicle accessories can be used for up to
10 minutes after the engine is turned off:
.Audio System
.Power Windows
.OnStar®System (if equipped)
.Sunroof (if equipped)
These features work when the key is in ON/RUN or
ACC/ACCESSORY. Once the key is turned from
ON/RUN to LOCK/OFF, the windows and sunroof
continue to work up to 10 minutes until any door is
opened. The radio continues to work for up to
10 minutes or until the driver door is opened.
Starting the Engine
If the vehicle has the DURAMAX®Diesel engine, see
the DURAMAX®Diesel manual for more information.
If the vehicle is a Two-mode Hybrid, see the Two-mode
Hybrid manual for more information.
Notice: Do not try to shift to P (Park) if the vehicle
is moving. If you do, you could damage the
transmission. Shift to P (Park) only when the
vehicle is stopped.
Move the shift lever to P (Park) or N (Neutral).
The engine will not start in any other position.
To restart the engine when the vehicle is already
moving, use N (Neutral) only.
3-23