2008 GMC ENVOY key

Battery Replacement
Replace the battery if the KEY FOB # BATTERY
LOW message displays in the DIC. See “KEY
FOB # BATTERY LOW” underDIC Warnings and
Messages on page 3-53for additional information.
Notice:When replacing the battery, use care not to
touch any of the circuitry. Static from your body
transferred to these surfaces may damage the
transmitter.To replace the battery in the RKE transmitter do the
following:
1. Separate the halves of the transmitter with a at,
thin object inserted into the slot between the
covers of the transmitter housing.
2. Remove the old battery. Do not use a metal object.
3. Insert the new battery. Replace with a CR2032
or equivalent battery.
4. Put the transmitter back together tightly.
2-6

Doors and Locks
Door Locks
{CAUTION:
Unlocked doors can be dangerous.
Passengers, especially children, can easily
open the doors and fall out of a moving
vehicle. When a door is locked, the handle
will not open it. You increase the chance of
being thrown out of the vehicle in a crash if
the doors are not locked. So, wear safety
belts properly and lock the doors whenever
you drive.
Young children who get into unlocked
vehicles may be unable to get out. A child
can be overcome by extreme heat and can
suffer permanent injuries or even death
from heat stroke. Always lock your vehicle
whenever you leave it.
Outsiders can easily enter through an
unlocked door when you slow down or stop
your vehicle. Locking your doors
can help prevent this from happening.There are several ways to lock and unlock your vehicle.
You can use the remote keyless entry system.
You can use your key to unlock your door from
the outside.
You can lock or unlock the door from the inside by
sliding the manual lever forward or rearward. When the
door is unlocked, you can see a red area on the lever.
The manual lever on each door works only that
door’s lock.
2-7

Power Door Locks
The power door lock
switches are located on
the driver’s and front
passenger’s door armrests.
Press the lock symbol to lock all of the doors. To unlock
the doors, press the other side of the switch.
Delayed Locking
This feature delays the locking of the doors and the
liftgate when using the power lock or the remote keyless
entry system.
The rst press of the power door lock switch or lock
button on the remote keyless entry transmitter with the
driver’s door open will activate the delay locking. A chime
will sound. All doors and the liftgate can be reopened for
up to ve seconds from the time the last door is closed.
Five seconds after the last door is closed, all the doors
will lock. You can lock the doors immediately by using
the power door lock switch or by pressing the lock button
on the optional remote keyless entry transmitter a
second time.
If the key is inserted in the ignition, this feature will not
lock the doors. SeeLockout Protection on page 2-11.
You can turn the delayed locking feature on or off. If the
feature is turned off, the doors will lock immediately when
a power door lock switch or remote keyless entry
transmitter lock button is pressed.
2-8

Programming Delayed Locking
To turn the delayed locking feature on or off, do the
following:
1. Press and hold the power door lock switch on the
driver’s door in the lock position.
2. Press the remote keyless entry transmitter unlock
button twice.
If the delayed locking feature was on, it will now be off.
If the feature was off, it will now be on.
Programmable Automatic Door
Locks
Your vehicle is equipped with an automatic lock/unlock
feature which enables you to program your vehicle’s
power door locks. You can program this feature through
the Driver Information Center (DIC), or by the following
method. SeeDIC Vehicle Customization on page 3-58.
Programmable Locking Feature
Following are the two locking modes that can be
programmed:
Mode 1:All doors lock when the transmission is shifted
out of PARK (P).
Mode 2:All doors lock when the vehicle speed is
greater than 8 mph (13 km/h).The automatic door locks were pre-programmed at the
factory to lock all the doors when the transmission
is shifted into gear. The following instructions detail how
to program your door locks differently than the factory
setting. Choose one of the two programming options
listed previously before entering the program mode.
To enter the program mode, do the following:
1. Begin with the ignition off. Then pull the turn
signal/multifunction lever toward you and hold
it there while you perform the next step.
2. Turn the key to RUN and LOCK twice. Then, with
the key in LOCK, release the turn signal/multifunction
lever. Once you do this, you will hear the lock switch
lock and unlock, the horn will chirp twice, and a
30-second program timer will begin.
3. You are now ready to program the automatic door
locks. Select one of the two programming options
listed previously, and press the lock side of the
power door lock switch to cycle through the lock
options. You will have 30 seconds to begin
programming. If you exceed the 30-second limit,
the locks will automatically lock and unlock and the
horn will chirp twice to indicate that you have left
the program mode. If this occurs, repeat the
procedure beginning with Step 1 to re-enter
the programming mode.
2-9

You can exit the program mode any time by turning the
ignition to RUN. The locks will automatically lock and
unlock and the horn will chirp twice to indicate that you
are leaving the program mode. If the lock/unlock switches
are not pressed while in the programming mode, the
current auto lock/unlock setting will not be modied.
See your dealer for more information.
Programmable Unlocking Feature
The following is the list of available programming
options:
Mode 1:Driver’s door unlocks when the transmission is
shifted into PARK (P).
Mode 2:All doors unlock when the transmission is
shifted into PARK (P).
Mode 3:All doors unlock when the key is removed
from the ignition.
Mode 4:No automatic door unlock.
The automatic door locks were pre-programmed at the
factory to unlock all doors once the transmission is shifted
to PARK (P). The following instructions detail how to
program your door locks differently than the factory
setting. Choose one of the four programming options
listed previously before entering the program mode.To enter the program mode you need to do the
following:
1. Begin with the ignition off. Then pull the turn
signal/multifunction lever toward you and hold
it there while you perform the next step.
2. Turn the key to RUN and LOCK twice. Then, with the
key in LOCK, release the turn signal/multifunction
lever. Once you do this, you will hear the lock switch
lock and unlock, the horn will chirp twice, and a
30-second program timer will begin.
3. You are now ready to program the automatic door
locks. Select one of the four programming options
listed above, and press the unlock side of the power
door lock switch to cycle through the unlocking
options. You will have 30 seconds to begin
programming. If you exceed the 30-second limit,
the locks will automatically lock and unlock and
the horn will chirp twice to indicate that you have
left the program mode. If this occurs, repeat the
procedure beginning with Step 1 to re-enter the
programming mode.
You can exit the program mode any time by turning the
ignition to RUN. The locks will automatically lock and
unlock and the horn will chirp twice to indicate that
you are leaving the program mode. If the lock/unlock
switches are not pressed while in the programming
mode, the current auto lock/unlock setting will not
be modied.
See your dealer for more information.
2-10

Rear Door Security Locks
Your vehicle may have this feature. You can lock the
rear doors so they cannot be opened from the inside by
passengers. To use one of these locks do the following:
1. Open one of the rear doors. You will nd a security
lock lever located on the inside edge of each
rear door.
2. Move the lever down
to engage the security
lock. Move the lever
up to disengage
the security lock.
3. Close the door.The rear doors of your vehicle cannot be opened from
the inside while this feature is in use. If you want to open
the rear door while the security lock is on, unlock the
door and open the door from the outside.
Lockout Protection
This feature stops the power door locks from locking
when the key is in the ignition and a door is open
to protect you from locking your key in the vehicle.
If the power lock switch is pressed when a door is open
and the key is in the ignition, all the doors will lock
and then the driver’s door will unlock.
2-11

Liftgate/Liftglass
{CAUTION:
It can be dangerous to drive with the liftgate or
liftglass 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 liftgate
open or if electrical wiring or other cable
connections must pass through the seal
between the body and the liftgate or liftglass:
Make sure all other windows are shut.
Turn the fan on your climate control system
to its highest speed and select the control
setting that will force outside air into your
vehicle. See “Climate Control System” in
the Index.
If you have air outlets on or under the
instrument panel, open them all the way.
SeeEngine Exhaust on page 2-37.
Liftgate Release
To unlock the liftgate, use the power door lock switch
or the remote keyless entry transmitter. SeeRemote
Keyless Entry (RKE) System Operation on page 2-5.
The liftglass will also unlock when the liftgate is
unlocked.
Press the button on the liftglass to open it. To open the
entire liftgate, lift the handle located in the center of
the liftgate. When the liftgate is opened, the liftglass
will lock after a short delay.
Emergency Release for Opening
Liftgate
1. Remove the trim plug, located on the inside of the
liftgate in the center, to expose the access hole in
the trim panel.
2. Use a tool to reach through the access hole in the
trim panel.
3. Pry the left release lever up to the unlock position.
Pry the right release lever up to unlatch the liftgate.
4. Reinstall the trim plug.
2-12

Power Windows
{CAUTION:
Leaving children, helpless adults, or pets in a
vehicle with the windows closed is dangerous.
They can be overcome from extreme heat in
warm or hot weather and suffer permanent
injuries or even death from heat stroke.
Leaving children in a vehicle with the ignition
key 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 with the keys in the
ignition 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.The controls for the power windows are located on
the armrest on each of the side doors. With power
windows, the switches operate the windows when the
ignition is in RUN, ACCESSORY or when Retained
Accessory Power (RAP) is active. SeeRetained
Accessory Power (RAP) on page 2-22. The driver’s door
also has a switch for each of the passenger’s windows.
Press down the top of the switch to lower the window
and pull up on the switch to raise the window. If you hold
the switch down for three to seven seconds after the
window has been completely lowered or raised,
the window will not operate for about 15 seconds.
2-14