2008 GMC ENVOY service indicator

TIGHTEN FUEL CAP
This message may display and a chime may sound if
the vehicle’s fuel cap is not tightened properly. Fully
reinstall the fuel cap. SeeFilling the Tank on page 5-8.
The diagnostic system can determine if the fuel cap
has been left off or improperly installed. A loose
or missing fuel cap allows fuel to evaporate into the
atmosphere. This message remains on until it is
manually cleared from the DIC display. The DIC
message is also cancelled if the ignition is turned off.
The DIC message and the Service Engine Soon
light may come on again during a second trip if the
fuel cap is still not tightened properly. SeeMalfunction
Indicator Lamp on page 3-41for more information.
TRACTION CONTROL OFF
This message displays when you momentarily press
the StabiliTrak®button located on the transmission
shift handle. In this mode, stability control and the
brake-traction control are functional. Engine speed
management will be modied and the driven wheels
can spin more freely. For more details on this mode,
seeStabiliTrak
®System on page 4-6.
TURN SIGNAL ON
This message displays and a chime sounds if a turn
signal is left on for 3/4 of a mile (1.2 km). Move the turn
signal/multifunction lever to the off position.
DIC Vehicle Customization
Your vehicle may have customization capabilities that
allow you to program some features to one setting
based on your preference. All of the customizable
options listed may not be available on your vehicle.
Only the options available display on the Driver
Information Center (DIC).
The default settings for the customization features were
set when your vehicle left the factory, but may have
been changed from their default state since then.
To change feature preferences, make sure the ignition
is on and the vehicle is in PARK (P). To avoid excessive
drain on the battery, it is recommended that the
headlamps are turned off.
Press the customization button to scroll through the
available customizable options.
After pressing the customization button, VEHICLE
SETTINGS momentarily displays before going to a
customization option.
3-58

Before You Drive
The RSE system is for rear seat passengers only and is
not intended for the driver while driving.
Parental Control
This button is located behind the video screen. Press
this button while a DVD or CD is playing to freeze the
video and mute the audio. The video screen displays
Parental Control ON and the power indicator light on
the DVD player ashes. It also disables all other button
operations from the remote control and the DVD player,
with the exception of the eject button. Press this button
again to restore operation of the DVD player.
This button can also be used to turn the DVD player
power on and automatically resume play if the ignition
is in RUN, ACCESSORY, or if Retained Accessory
Power (RAP) is active.
Headphones
The RSE system includes two sets of wireless
headphones.
Each set of headphones has an ON/OFF control.
An indicator light illuminates on the headphones when
they are on. If the light does not illuminate, the batteries
may need to be replaced. See “Battery Replacement”
following for more information.Each set of headphones has a volume knob. To adjust
the volume, adjust this knob.
The transmitters are located below the video display
screen. The headphones shut off automatically if
they lose the signal from the system after about
four minutes to save battery power. The signal can
be lost if the system is turned off or if the headphones
are out of range of the transmitters.
When using the wired headphones, if the front seat
passengers play a CD in the Radio with Six-Disc CD
(if equipped) or use XM™ Satellite Radio Service
(if equipped), you will hear the audio for these sources,
instead of the DVD or CD that is currently playing
through the RSE.
Notice:Do not store the headphones in heat or
direct sunlight. This could damage the headphones
and repairs will not be covered by your warranty.
Storage in extreme cold can weaken the batteries.
Keep the headphones stored in a cool, dry place.
Both sets of rear seat headphones may include foam
ear pads.
The foam ear pads can become worn or damaged if
they are not handled or stored properly. They can
be replaced separately from the headphone set.
The headphone replacement foam ear pads can be
ordered in pairs. See your dealer/retailer for more
information.
3-88

DVD Player
The DVD player is located in the overhead console and
is controlled by the buttons on the DVD player or on
the remote control. See “Remote Control” later in
this section for more information.
The DVD player power can be turned on while the
ignition is in ON/RUN, ACC/ACCESSORY, or when
Retained Accessory Power (RAP) is active.
The RSE system DVD player is only compatible with
DVDs of the appropriate region code in the country that
the vehicle was sold. The DVD region code is printed
on the jacket of most DVDs.
Standard audio CDs, CD-R, CD-RW, Video CD and
Photo CD/CD-R media are fully supported by this DVD
player. DVD-R and DVD-RW media is supported if
formatted as DVD-Video. DVD+R and DVD+RW media
may or may not be supported by the DVD player. The
DVD player does not support DVD-RAM, DVD-ROM, and
DVD Audio media. An error message displays if this type
of media is inserted into the DVD player.
When using the wired headphones, not included, if
the front seat passengers play a CD in the Radio with
Six-Disc CD (if equipped) or use XM™ Satellite Radio
Service (if equipped), the audio for these sources will be
heard, instead of the DVD or CD that is currently playing
through the RSE.
If an error message displays on the video screen,
see “DVD Messages” later in this section.
DVD Player Buttons (Without Sunroof)
O(Power):Press to turn the RSE system on and off.
The power indicator light illuminates when the power
is on.
X(Eject):Press to eject a DVD or CD.
SRCE (Source):Press to switch between the DVD
player and an auxiliary source.
c(Stop):Press to stop playing, rewinding, or fast
forwarding a DVD or CD. Press twice to return to
the beginning of the DVD.
s(Play/Pause):Press to start play of a DVD or CD.
Press while a DVD or CD is playing to pause it. Press
again to continue the play of the DVD or CD.
3-91

The following chart describes the StabiliTrak®system events and the corresponding messages and lights that will be
displayed on the instrument panel cluster.
Vehicles with a DIC Vehicles without a DIC Event
StabiliTrak®
Indicator LightDIC MessageStabiliTrak
®
Indicator LightStabiliTrak
®Service
Light—
Off None Off OffStabiliTrak
®On
mode (System is fully
enabled, but is not
actively controlling
vehicle stability).
Solid Traction Control Off Solid OffTraction Control
Off Mode
Solid StabiliTrak
®Off Solid OffStabiliTrak
®Off Mode
(StabiliTrak®indicator
light will ash when
system rst enters
this mode).
Blinking StabiliTrak
®Active Blinking OffStabiliTrak
®system
activates using
engine speed
management, brake
traction control,
and/or stability
control.
Solid Service StabiliTrak
®Solid SolidStabiliTrak
®system is
disabled due to a
system fault.
SolidStabiliTrak
®Not
ReadySolid OffStabiliTrak®system is
disabled due to a
failure to initialize.
4-8

Overload Protection
The air suspension system is equipped with overload
protection. Overload protection is designed to protect
the air suspension system, and it is an indicator to
the driver that the vehicle is overloaded. When
the overload protection mode is on, it will not allow
damage to the air compressor. However, do not
overload the vehicle. SeeLoading Your Vehicle
on page 4-34.
If the suspension remains at a low height, the rear
axle load has exceeded GAWR (Gross Axle Weight
Rating). When the overload protection mode is activated,
the compressor operates for about 30 seconds to one
minute without raising the vehicle depending on the
amount of overload. This will continue each time
the ignition is turned on until the rear axle load is
reduced below GAWR.
Indicator Light
The indicator light on the inator switch in the rear
passenger compartment also serves as an indicator for
internal system error. If the indicator light is ashing
without the load leveling function or the inator being
active, turn off the ignition. The next day turn on the
ignition and check the indicator light. The vehicle can
be driven with the light ashing, but if it is you should
have the vehicle serviced as soon as possible.
Towing a Trailer
{CAUTION:
If you do not use the correct equipment and
drive properly, you can lose control when you
pull a trailer. For example, if the trailer is too
heavy, the brakes may not work well — or even
at all. You and your passengers could be
seriously injured. You may also damage your
vehicle; the resulting repairs would not be
covered by your warranty. Pull a trailer only if
you have followed all the steps in this section.
Ask your dealer/retailer for advice and
information about towing a trailer with
your vehicle.
Notice:Pulling a trailer improperly can damage
your vehicle and result in costly repairs that would
not be covered by your warranty. Always follow
the instructions in this section and check with your
dealer/retailer for more information about towing
a trailer with your vehicle.
To identify the trailering capacity of your vehicle, you
should read the information in “Weight of the Trailer” that
appears later in this section.
4-45

Gasoline Octane
Use regular unleaded gasoline with a posted octane
rating of 87 or higher. If the octane rating is less than 87,
you might notice an audible knocking noise when you
drive, commonly referred to as spark knock. If this
occurs, use a gasoline rated at 87 octane or higher as
soon as possible. If you are using gasoline rated at
87 octane or higher and you hear heavy knocking, the
engine needs service.
Gasoline Specications
At a minimum, gasoline should meet ASTM specication
D 4814 in the United States or CAN/CGSB-3.5 or 3.511
in Canada. Some gasolines contain an octane-enhancing
additive called methylcyclopentadienyl manganese
tricarbonyl (MMT). We recommend against the use of
gasolines containing MMT. SeeAdditives on page 5-7for
additional information.
California Fuel
If your vehicle is certied to meet California Emissions
Standards, it is designed to operate on fuels that meet
California specications. See the underhood emission
control label. If this fuel is not available in states adopting
California emissions standards, your vehicle will operate
satisfactorily on fuels meeting federal specications, but
emission control system performance might be affected.
The malfunction indicator lamp could turn on and your
vehicle might fail a smog-check test. SeeMalfunction
Indicator Lamp on page 3-41. If this occurs, return to your
authorized dealer/retailer for diagnosis. If it is determined
that the condition is caused by the type of fuel used,
repairs might not be covered by your warranty.
5-6

Additives
To provide cleaner air, all gasolines in the United States
are now required to contain additives that help prevent
engine and fuel system deposits from forming, allowing
the emission control system to work properly. In most
cases, you should not have to add anything to the fuel.
However, some gasolines contain only the minimum
amount of additive required to meet U.S. Environmental
Protection Agency regulations. To help keep fuel injectors
and intake valves clean, or if your vehicle experiences
problems due to dirty injectors or valves, look for gasoline
that is advertised as TOP TIER Detergent Gasoline. Also,
your dealer/retailer has additives that will help correct and
prevent most deposit-related problems.
Gasolines containing oxygenates, such as ethers and
ethanol, and reformulated gasolines might be available
in your area. We recommend that you use these
gasolines, if they comply with the specications described
earlier. However, E85 (85% ethanol) and other fuels
containing more than 10% ethanol must not be used in
vehicles that were not designed for those fuels.
Notice:Your vehicle was not designed for fuel that
contains methanol. Do not use fuel containing
methanol. It can corrode metal parts in the fuel
system and also damage plastic and rubber parts.
That damage would not be covered under your
warranty.Some gasolines that are not reformulated for low
emissions can contain an octane-enhancing additive
called methylcyclopentadienyl manganese tricarbonyl
(MMT); ask the attendant where you buy gasoline
whether the fuel contains MMT. We recommend against
the use of such gasolines. Fuels containing MMT can
reduce the life of spark plugs and the performance of the
emission control system could be affected. The
malfunction indicator lamp might turn on. If this occurs,
return to your dealer/retailer for service.
Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel might be hard
to nd. Never use leaded gasoline or any other fuel
not recommended in the previous text on fuel. Costly
repairs caused by use of improper fuel would not
be covered by your warranty.
To check the fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you will be driving.
5-7

Brake Wear
Your vehicle has disc brakes. Disc brake pads have
built-in wear indicators that make a high-pitched warning
sound when the brake pads are worn and new pads
are needed. The sound can come and go or be heard all
the time your vehicle is moving, except when you are
pushing on the brake pedal rmly.
{CAUTION:
The brake wear warning sound means that
soon the brakes will not work well. That could
lead to an accident. When you hear the brake
wear warning sound, have your vehicle
serviced.
Notice:Continuing to drive with worn-out brake
pads could result in costly brake repair.Some driving conditions or climates can cause a brake
squeal when the brakes are rst applied or lightly
applied. This does not mean something is wrong with
the brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated, inspect
brake pads for wear and evenly tighten wheel nuts in
the proper sequence to torque specications in
Capacities and Specifications on page 5-120.
Brake linings should always be replaced as complete
axle sets.Brake Pedal Travel
See your dealer/retailer if the brake pedal does not
return to normal height, or if there is a rapid increase in
pedal travel. This could be a sign that brake service
might be required.
Brake Adjustment
Every time you make a brake stop, the disc brakes
adjust for wear.
5-40