2002 GMC ENVOY battery

2-102
DIC Warnings and Messages
Warning messages are displayed on the DIC to notify
the driver that the status of the vehicle has changed and
that some action may be needed by the driver to correct
the condition. More than one message may appear at
one time, they will appear one behind the other. Some
messages may not require immediate action but you
should press the select button to acknowledge that you
received the message and clear it from the display.
Some messages cannot be cleared from the display
because they are more urgent. These message required
action before they can be removed from the DIC display.
The following are the possible messages that can be
displayed and some information about them.
ENGINE COOLANT HOT/IDLE ENGINE
If the cooling system temperature gets hot this message
will appear in the DIC and you will hear a chime. Stop
the vehicle and let the engine idle in PARK (P) to allow
the coolant to reach a safe temperature. This message
will clear when the coolant temperature drops to a safe
operating temperature.ENGINE OVERHEATED/STOP ENGINE
(If Equipped)
If the engine cooling system reaches unsafe
temperatures for operation, this message will appear
in the DIC and you will hear a chime. Stop and turn off
the vehicle as soon as it is safe to do so to avoid severe
damage. This message will clear when the engine has
cooled to a safe operating temperature.
OIL PRESSURE LOW/STOP ENGINE
If low oil pressure levels occur this message will be
displayed on the DIC. Stop the vehicle as soon as safely
possible and do not operate it until the cause of the low
oil pressure has been corrected. Check your oil as soon
as possible and have your vehicle serviced.
BATTERY NOT CHARGING
If the battery is not charging during operation this
message will appear on the DIC. Driving with this
problem could drain your battery. Have the electrical
system checked as soon as possible. Pressing the select
button will acknowledge this message and clear it from
the DIC display.

2-105
PASSENGER DOOR AJAR
If the passenger's door is not fully closed this message
will appear on the display and you will hear a chime.
Stop and turn off the vehicle, check the door for
obstacles, and close the door again. Check to see if the
message still appears on the DIC. Pressing the select
button will acknowledge this message and clear it from
the DIC display.
LEFT REAR DOOR AJAR
If the driver's side rear door is not fully closed this
message will appear on the display and you will hear a
chime. Stop and turn off the vehicle, check the door for
obstacles, and close the door again. Check to see if the
message still appears on the DIC. Pressing the select
button will acknowledge this message and clear it from
the DIC display.RIGHT REAR DOOR AJAR
If the passenger's side rear door is not fully closed this
message will appear on the display and you will hear a
chime. Stop and turn off the vehicle, check the door for
obstacles, and close the door again. Check to see if the
message still appears on the DIC. Pressing the select
button will acknowledge this message and clear it from
the DIC display.
RFA # BATTERY LOW
If a remote keyless entry transmitter battery is low this
message will appear on the DIC. The battery needs to
be replaced in the transmitter. Pressing the select button
will acknowledge this message and clear it from the
DIC display.

3-46 Headphones
The entertainment system includes two
IR wireless headphones.
Mini
-headphone jacks are also provided for use
with customer provided headphones.
The wireless headphones have an ON/OFF switch
and a volume control. To use the headphones turn the
switch to ON. An indicator light will illuminate. If the
light does not illuminate, the batteries may need to be
replaced. See ªBattery Replacementº later in this
section for more information. Switch the headphones
to OFF when not in use.
If the system is shut off, or if the headphones are out
of range of the IR transmitters below the overhead
RSE control panel for more than three minutes,
the headphones will shut off automatically to save the
battery. If you move too far forward or step out of the
vehicle, the headphones will lose the audio signal.
To adjust the volume on both pairs of wired headphones,
use the volume control.
NOTICE:
Do not store the headphones in heat or direct
sunlight. This could damage the headphones
and would not be covered by your warranty.
Keep the headphones stored in a cool, dry place.
Battery Replacement
To change the batteries, do the following:
1. Loosen the screw on the battery compartment
door located on the left side of the headphones.
2. Remove the batteries from the compartment.
3. Replace the two AAA batteries. Make sure that
they are installed correctly.
If the headphones are to be stored for a long period
of time, remove the batteries and keep them in a cool,
dry place.

3-53
COMP/AUDIO (COMP) Compression: Press and
release this button to display the current compression
displayed on the screen. Press this button again to
select the next compression state. Three compression
states are available including minimum, standard and
off. The compression feature only functions on AC3
(Dolby Digital) encoded DVD video discs.
Press and hold this button to see if the DVD playing
has optional audio tracks, such as different languages
or commentaries. Press and release to change selections.
INPUT/TITLE DVD AUX (Auxiliary): Press and
release this button to switch between the auxiliary input
device and the DVD player.
Press and hold this button to see a display of the DVD's
titles. Press and release to change the titles available.
RTN (Return): When a DVD menu is active and
the return button is pressed, the selected option will be
disabled. This button could have different functions with
different discs.
SCREEN BRIGHTNESS: Press the plus or
minus symbol to increase or decrease the brightness
of the screen. This button can also be found above the
video screen.
LIGHT: Press this button to illuminate the keypad
for about eight seconds.Setup Menu
To access the setup menu, ensure a DVD disc is in the
player and the video is in stop mode. Press the menu key.
Once the menu is activated, use the UP, DOWN, RIGHT,
LEFT, and Enter buttons to navigate the screen.
The setup menu allows the user to select default preferences
for Menu Language, Subtitle Language, Audio Language,
TV Aspect, TV Mode, and Dynamic Range Compression.
Not all DVDs support all the feature defaults in the
setup menus. In the event a particular feature is not
supported, defaults will be provided by the DVD media.
Exit the setup menu by pressing the RETURN button
on the remote control. If you make changes to the
system setup defaults, the disc will resume play from
it's beginning and not where it previously left off.
Battery Replacement
To change the batteries, do the following:
1. Unclip the battery door located on the back of
the remote control.
2. Remove the batteries from the compartment.
3. Replace the two AA batteries. Make sure that
they are installed correctly.
If the remote control is to be stored for a long period
of time, remove the batteries and keep them in a cool,
dry place.

4-43

Put on extra clothing or wrap a blanket around you.
If you have no blankets or extra clothing, make body
insulators from newspapers, burlap bags, rags, floor
mats
-- anything you can wrap around yourself or
tuck under your clothing to keep warm.
You can run the engine to keep warm, but be careful.
CAUTION:
Snow can trap exhaust gases under your vehicle.
This can cause deadly CO (carbon monoxide) gas
to get inside. CO could overcome you and kill
you. You can't see it or smell it, so you might not
know it is in your vehicle. Clear away snow from
around the base of your vehicle, especially any
that is blocking your exhaust pipe. And check
around again from time to time to be sure snow
doesn't collect there.
Open a window just a little on the side of the
vehicle that's away from the wind. This will help
keep CO out.
Run your engine only as long as you must. This saves
fuel. When you run the engine, make it go a little faster
than just idle. That is, push the accelerator slightly. This
uses less fuel for the heat that you get and it keeps the
battery charged. You will need a well
-charged battery to
restart the vehicle, and possibly for signaling later on
with your headlamps. Let the heater run for a while.

4-45 Dinghy Towing
When towing your vehicle, turn the ignition off.
To prevent your battery from draining while towing,
remove the Ignition A and the Ignition B fuses from the
engine compartment fuse block. Be sure to reinstall the
fuse when you reach your destination. See ªFuses and
Circuit Breakersº in the Index.
Tw o
-Wheel-Drive Vehicles
Tw o
-wheel-drive vehicles, should not be towed with
all four wheels on the ground. Two
-wheel-drive
transmissions have no provisions for internal lubrication
while being towed. To properly tow these vehicles,
they should be placed on a platform trailer with all
four wheels off the ground.
In rare cases when it's unavoidable that a
two
-wheel-drive vehicle is to be towed with all
four wheels on the ground, the propeller shaft to
axle yoke orientation should be marked and the
propeller shaft removed following the applicable
service manual removal/installation procedure.
Dust or dirt can enter the back of the transmission
through the opening created by removing the propeller
shaft if proper protection is not provided. Also, check
the transmission fluid level before driving the truck.Four
-Wheel-Drive Vehicles
Use the following procedure to tow your vehicle:
1. Firmly set the parking brake.
2. Shift the transmission to PARK (P).
3. Securely attach the vehicle being towed to the
tow vehicle.

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4. Shift the transfer case to NEUTRAL (N).
See ªFour
-Wheel Driveº in the Index for the
proper procedure to select the NEUTRAL position
for your vehicle.
5. Release the parking brake only after the vehicle
being towed is firmly attached to the towing vehicle.
6. Turn the ignition off. This unlocks the steering
column and reduces battery drain as long as the
Ignition A and Ignition B fuses are removed.
Unlocking the steering column will allow the
proper movement of the front wheels and tires
during towing.
CAUTION:
Shifting a four-wheel-drive vehicle's transfer
case into NEUTRAL can cause your vehicle to
roll even if the transmission is in Park (P). You or
others could be injured. Make sure the parking
brake is firmly set before you shift the transfer
case to NEUTRAL.
Dolly Towing
Your vehicle was not designed to be dolly towed. If you
need to tow your vehicle see ªDinghy Towingº earlier in
this section.
CAUTION:
Shifting a four-wheel-drive vehicle's transfer
case into NEUTRAL can cause your vehicle to
roll even if the transmission is in PARK (P).
You or others could be injured. Make sure the
parking brake is firmly set before you shift the
transfer case into NEUTRAL.

4-60 Trailer Wiring Harness
Your vehicle is equipped with the seven-wire trailer
towing harness. This harness has a seven
-pin universal
heavy
-duty trailer connector that is attached to a bracket
on the hitch platform. The seven
-wire harness contains
the following trailer circuits:

Yellow: Left Stop/Turn Signal

Dark Green: Right Stop/Turn Signal

Brown: Running Lamps

White: Ground

Light Green: Back
-up Lamps

Red: Battery Feed

Dark Blue: Electric Brakes
If you need to tow a light
-duty trailer with a standard
four
-way round pin connector, an adapter connector is
available from your dealer.
Your vehicle is also equipped with wiring for an electric
trailer brake controller. These wires are located inside
the vehicle on the driver's side under the instrument
panel. These wires should be connected to an electric
trailer brake controller by your dealer or a qualified
service center.