2008 GMC ENVOY key

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-2
Rear Seats
..............................................1-11
Safety Belts
.............................................1-13
Child Restraints
.......................................1-32
Airbag System
.........................................1-53
Restraint System Check
............................1-68
Features and Controls..................................... 2-1
Keys
........................................................ 2-3
Doors and Locks
....................................... 2-7
Windows
.................................................2-13
Theft-Deterrent Systems
............................2-16
Starting and Operating Your Vehicle
...........2-20
Mirrors
....................................................2-39
OnStar
®System
......................................2-48
Universal Home Remote System
................2-52
Storage Areas
.........................................2-57
Sunroof
..................................................2-60
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls
......................................3-21
Warning Lights, Gages, and Indicators
........3-30
Driver Information Center (DIC)
..................3-49
Audio System(s)
.......................................3-65Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-40
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-5
Checking Things Under the Hood
...............5-10
Rear Axle
...............................................5-46
Four-Wheel Drive
.....................................5-47
Front Axle
...............................................5-48
Headlamp Aiming
.....................................5-49
Bulb Replacement
....................................5-49
Windshield Wiper Blade Replacement
.........5-54
Tires
......................................................5-57
Appearance Care
...................................5-100
Vehicle Identication
...............................5-108
Electrical System
....................................5-109
Capacities and Specications
...................5-120
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance Information.................... 7-1
Customer Assistance and Information
........... 7-2
Reporting Safety Defects
...........................7-15
Vehicle Data Recording and Privacy
...........7-18
Index................................................................ 1
2008 GMC Envoy and Envoy Denali Owner ManualM

To heat only the seatback, press the vertical button with
the heated seatback symbol. An indicator light on the
button will come on to designate that only the seatback
is being heated. Additional presses will cycle through
the heat levels for the seatback only.
The feature will shut off automatically when the ignition
is turned off.
Memory Seat, Mirrors, and Pedals
If your vehicle has this
feature, the controls for
the memory function are
located on the driver’s door.
These buttons are used to program and recall memory
settings for the driver’s seating position, both outside
mirror positions, and the adjustable pedals, if equipped.
The settings for these features can be saved for up
to two drivers.To store the memory settings, do the following:
1. Adjust the driver’s seat, including the seatback
recliner and lumbar, both of the outside mirrors,
and the adjustable pedals, if equipped, to the
desired position.
SeeAdjustable Throttle and Brake Pedal on
page 2-24for more information.
2. Press and hold the 1 or 2 button of the memory
control for three seconds. A double chime will
sound to let you know that the position has been
stored.
To repeat the procedure for a second driver, follow
the preceding steps, but press the other numbered
memory control button.
To recall the memory settings, do one of the following:
Press and release button 1 or 2 while the vehicle
is in PARK (P). A single chime will sound and
the memory position will be recalled.
If programmed to do so through the Driver
Information Center (DIC), pressing the unlock button
on the remote keyless entry transmitter will recall the
preset driver’s memory seat, mirrors, and adjustable
pedals position. The numbers on the back of the
transmitters, 1 or 2, correspond to the numbers
on the memory controls.
If programmed to do so through the DIC, placing the
key in the ignition will recall the driver’s memory seat,
mirrors, and adjustable pedals positions.
1-5

See “Seat Recall” underDIC Vehicle Customization on
page 3-58for more information.
To stop recall movement of the memory seat feature at
any time, press one of the memory buttons or power
seat controls.
Easy Exit Seat
The control for the easy exit seat function is located on
the driver’s door below the memory buttons 1 and 2.
The easy exit seat button is used to program and recall
the desired driver’s seat position when exiting or entering
the vehicle. The mirrors, power lumbar, recline, and
adjustable pedals, if equipped, positions will not be stored
or recalled when using the easy exit seat function.
The seat position can be saved for up to two drivers.
To store the easy exit seat position, do the following:
1. Press and release the 1 or 2 button of the memory
control for less than three seconds. The seat will
move to the stored memory position.
2. Adjust the seat to the desired exit position.
3. Press and hold the easy exit seat button for more
than three seconds. A double chime will sound to
let you know that the position has been stored
for the selected button 1 or 2.To repeat the procedure for a second driver, follow
the preceding steps, but press the other numbered
memory control button.
To recall the easy exit seat position, do one of the
following:
Press the easy exit seat button on the memory
control while the vehicle is in PARK (P). The
seat will move to the stored exit position.
Or, if the easy exit seat feature is activated in the
Driver Information Center (DIC), removing the key
from the ignition will move the seat to the exit
position. See “Easy Exit Seat” underDIC Vehicle
Customization on page 3-58for more information
on activating this feature in the DIC.
If an easy exit seat position has not been stored, the
default position is all the way rearward.
1-6

Safety Belt Use During Pregnancy
Safety belts work for everyone, including pregnant
women. Like all occupants, they are more likely to
be seriously injured if they do not wear safety belts.
A pregnant woman should wear a lap-shoulder belt,
and the lap portion should be worn as low as possible,
below the rounding, throughout the pregnancy.The best way to protect the fetus is to protect the
mother. When a safety belt is worn properly, it is
more likely that the fetus will not be hurt in a crash.
For pregnant women, as for anyone, the key to making
safety belts effective is wearing them properly.
Safety Belt Extender
If the vehicle’s safety belt will fasten around you,
you should use it.
But if a safety belt is not long enough, your dealer/retailer
will order you an extender. When you go in to order it,
take the heaviest coat you will wear, so the extender will
be long enough for you. To help avoid personal injury, do
not let someone else use it, and use it only for the seat it
is made to t. The extender has been designed for adults.
Never use it for securing child seats. To wear it, attach it
to the regular safety belt. For more information, see the
instruction sheet that comes with the extender.
1-31

Keys...............................................................2-3
Remote Keyless Entry (RKE) System................2-4
Remote Keyless Entry (RKE) System
Operation...................................................2-5
Doors and Locks.............................................2-7
Door Locks....................................................2-7
Power Door Locks..........................................2-8
Delayed Locking.............................................2-8
Programmable Automatic Door Locks................2-9
Rear Door Security Locks..............................2-11
Lockout Protection........................................2-11
Liftgate/Liftglass............................................2-12
Windows........................................................2-13
Power Windows............................................2-14
Sun Visors...................................................2-15
Theft-Deterrent Systems..................................2-16
Content Theft-Deterrent.................................2-16
Passlock
®(U. S. Only)..................................2-17
PASS-Key®III+............................................2-18
PASS-Key®III+ Operation (Canada Only).........2-18
Starting and Operating Your Vehicle................2-20
New Vehicle Break-In....................................2-20
Ignition Positions..........................................2-21Retained Accessory Power (RAP)...................2-22
Starting the Engine.......................................2-22
Adjustable Throttle and Brake Pedal................2-24
Engine Coolant Heater..................................2-24
Active Fuel Management™.............................2-25
Automatic Transmission Operation...................2-26
Four-Wheel Drive..........................................2-29
Parking Brake..............................................2-33
Shifting Into PARK (P)...................................2-34
Shifting Out of PARK (P)...............................2-36
Parking Over Things That Burn.......................2-37
Engine Exhaust............................................2-37
Running the Vehicle While Parked..................2-38
Mirrors...........................................................2-39
Manual Rearview Mirror.................................2-39
Manual Rearview Mirror with OnStar
®..............2-39
Automatic Dimming Rearview Mirror with
OnStar
®and Compass...............................2-39
Automatic Dimming Rearview Mirror with
OnStar
®, Compass and Temperature
Display....................................................2-41
Automatic Dimming Rearview Mirror with
Compass and Temperature Display..............2-44
Section 2 Features and Controls
2-1

Keys
{CAUTION:
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 the keys in a vehicle
with children.
This vehicle has keys that can be used for the ignition
and door lock that will t with either side up.
When a new vehicle is delivered, the dealer/retailer
provides the owner with a pair of identical keys and a
key code number.
2-3

The key code number tells your dealer/retailer or a
qualied locksmith how to make extra keys. Keep this
number in a safe place. If you lose your keys, you will be
able to have new ones made easily using this number.
Your selling dealer/retailer should also have this
number.
Notice:If you ever lock your keys in your vehicle,
you may have to damage the vehicle to get in.
Be sure you have spare keys.
If you ever get locked out of your vehicle, call the
Roadside Assistance Center. SeeRoadside Assistance
Program on page 7-8.
Remote Keyless Entry (RKE)
System
Your Remote Keyless Entry (RKE) system operates on
a radio frequency subject to Federal Communications
Commission (FCC) Rules and with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modications to this system by other than
an authorized service facility could void authorization to
use this equipment.
At times you may notice a decrease in operating range.
This is normal for any RKE system. If the transmitter
does not work or if you have to stand closer to
your vehicle for the transmitter to work, try this:
Check the distance. You may be too far from your
vehicle. You may need to stand closer during
rainy or snowy weather.
Check the location. Other vehicles or objects may
be blocking the signal. Take a few steps to the
left or right, hold the transmitter higher, and
try again.
Check to determine if battery replacement is
necessary. See “Battery Replacement” later in
this section.
If you are still having trouble, see your dealer/retailer
or a qualied technician for service.
2-4

Remote Keyless Entry (RKE)
System Operation
If your vehicle has this feature, you can lock and unlock
your doors from about 3 feet (1 m) up to 30 feet (9 m)
away using the RKE transmitter supplied with your
vehicle.
There are other conditions which can affect the
performance of the transmitter. SeeRemote Keyless
Entry (RKE) System on page 2-4.
K(Unlock):PressKto
unlock the driver’s door. The
parking lamps will ash and
the interior lights will come
on. Press
Ka second time
within three seconds to
unlock all the doors.You can program different feedback settings through the
Driver Information Center (DIC). For more information
seeDriver Information Center (DIC) on page 3-49.
Q(Lock):PressQto lock all the doors.
Press
Qagain within three seconds and the
horn will chirp.
L(Panic):PressLto make the horn sound. The
headlamps and taillamps will ash for up to 30 seconds.
This can be turned off by pressing
Lagain, by
waiting for 30 seconds, or by starting the vehicle.
Matching Transmitter(s) to Your
Vehicle
Each RKE transmitter is coded to prevent another
transmitter from unlocking your vehicle. If a transmitter is
lost or stolen, a replacement can be purchased through
your dealer/retailer. All transmitters need to be re-coded
to match the new transmitter. The lost transmitter will no
longer work after the new transmitters are re-coded.
Each vehicle can have a maximum of four transmitters
matched to it.
2-5