2002 GMC ENVOY radio

3-59 Audio Steering Wheel Controls
(If Equipped)
If your vehicle has this
feature, certain radio
functions can be operated
by using the controls on
your steering wheel.
AM/FM: Press this control to tune to the next radio
station. When playing a cassette tape or compact disc,
press AM/FM to switch to the radio.
(Program): Press this control to tune to a higher
preset radio station. When playing a cassette tape, press
program to hear the other side of a tape that is playing.
When using the CD changer, this control will seek to the
next selection.
(Volume): Press the up or down arrow to increase
or decrease volume.
Understanding Radio Reception
AM
The range for most AM stations is greater than for FM,
especially at night. The longer range, however, can
cause stations to interfere with each other. AM can pick
up noise from things like storms and power lines.
Try reducing the treble to reduce this noise if you
ever get it.
FM Stereo
FM stereo will give you the best sound, but FM signals
will reach only about 10 to 40 miles (16 to 65 km).
Tall buildings or hills can interfere with FM signals,
causing the sound to come and go.
Understanding DVD Distortion
You may experience audio distortion in the IR
headphones when operating cellular phones, scanners,
CB radios, Global Position Systems (GPS)*, two
-way
radios, mobile fax, or walkie talkies.
It may be necessary to turn off the DVD player when
operating one of these devices in or near the vehicle.
* Excludes the OnStar

System.

3-60 Tips About Your Audio System
Hearing damage from loud noise is almost undetectable
until it is too late. Your hearing can adapt to higher
volumes of sound. Sound that seems normal can be
loud and harmful to your hearing. Take precautions
by adjusting the volume control on your radio to a
safe sound level before your hearing adapts to it.
To help avoid hearing loss or damage do the following:
1. Adjust the volume control to the lowest setting.
2. Increase volume slowly until you hear comfortably
and clearly.NOTICE:
Before you add any sound equipment to your
vehicle
-- like a tape player, CB radio, mobile
telephone or two
-way radio -- be sure you
can add what you want. If you can, it's very
important to do it properly. Added sound
equipment may interfere with the operation
of your vehicle's engine, Delphi Electronics
radio or other systems, and even damage them.
Your vehicle's systems may interfere with the
operation of sound equipment that has been
added improperly.
So, before adding sound equipment, check with
your dealer and be sure to check federal rules
covering mobile radio and telephone units.

3-61 Care of Your Cassette Tape Player
A tape player that is not cleaned regularly can cause
reduced sound quality, ruined cassettes or a damaged
mechanism. Cassette tapes should be stored in their
cases away from contaminants, direct sunlight and
extreme heat. If they aren't, they may not operate
properly or may cause failure of the tape player.
Your tape player should be cleaned regularly after
every 50 hours of use. Your radio may display
CLEAN PLAYR to indicate that you have used
your tape player for 50 hours without resetting the
tape clean timer. If this message appears on the display,
your cassette tape player needs to be cleaned. It will
still play tapes, but you should clean it as soon as
possible to prevent damage to your tapes and player.
If you notice a reduction in sound quality, try a known
good cassette to see if it is the tape or the tape player
at fault. If this other cassette has no improvement in
sound quality, clean the tape player.The recommended cleaning method for your
cassette tape player is the use of a scrubbing action,
non-abrasive cleaning cassette with pads which scrub
the tape head as the hubs of the cleaner cassette turn.
The recommended cleaning cassette is available through
your dealer (GM Part No. 12344789).
When using a scrubbing action, non
-abrasive cleaning
cassette, it is normal for the cassette to eject because
your unit is equipped with a cut tape detection feature
and a cleaning cassette may appear as a broken tape.
If the cleaning cassette ejects, insert the cassette at least
three times to ensure thorough cleaning.
You may also choose a non
-scrubbing action, wet-type
cleaner which uses a cassette with a fabric belt to clean
the tape head. This type of cleaning cassette will not
eject on its own. A non
-scrubbing action cleaner may
not clean as thoroughly as the scrubbing type cleaner.
The use of a non
-scrubbing action, dry-type cleaning
cassette is not recommended.

3-62
After you clean the player, press and hold the eject
(upward pointing triangle) button for five seconds to
reset the CLEAN PLAYR indicator. The radio will
display CLEANED to show the indicator was reset.
Cassettes are subject to wear and the sound quality
may degrade over time. Always make sure the cassette
tape is in good condition before you have your tape
player serviced.
Care of Your Compact Disc and
DVD Player
The use of CD lens cleaner discs is not advised, due to
the risk of contaminating the lens of the CD optics with
lubricants internal to the CD mechanism.
Care of Your Compact Discs and DVDs
Handle discs carefully. Store them in their original cases
or other protective cases and away from direct sunlight
and dust. If the surface of a disc is soiled, dampen a
clean, soft cloth in a mild, neutral detergent solution
and clean it, wiping from the center to the edge.
Be sure never to touch the side without writing when
handling discs. Pick up discs by grasping the outer
edges or the edge of the hole and the outer edge.
Cleaning the Video Screen
Pour some isopropyl or rubbing alcohol on a clean cloth
and gently wipe the video screen. Do not spray directly
onto the screen and do not press too hard or too long on
the video screen.

3-63 Diversity Antenna System
Your AM FM antennas are located in the rear side
windows. Be sure that the inside surfaces of the rear side
windows are not scratched and that the lines on the glass
are not damaged. If the inside surfaces are damaged,
they could interfere with radio reception.
NOTICE:
Do not try to clear frost or other material from
the inside of the rear side windows with a razor
blade or anything else that is sharp. This may
affect your radio's ability to pick up stations
clearly. The repairs wouldn't be covered by
your warranty.
If you choose to add an aftermarket cellular telephone
to your vehicle, and the antenna needs to be attached to
the glass, be sure that you do not damage the grid lines
for the AM FM antennas or place the cellular telephone
antenna over the grid lines.
Chime Level Adjustment
The volume level of the vehicle's chimes can be
controlled by the radio. To change the volume level,
press and hold pushbutton 6 with the ignition on
and the radio power off. The chime volume level will
change from the normal level to loud, and LOUD will
be displayed on the radio. To change back to the default
or normal setting, press and hold pushbutton 6 again.
The chime level will change from the loud level to
normal, and NORMAL will be displayed.

5-4
2. Get the vehicles close enough so the jumper cables
can reach, but be sure the vehicles aren't touching
each other. If they are, it could cause a ground
connection you don't want. You wouldn't be able to
start your vehicle, and the bad grounding could
damage the electrical systems.
To avoid the possibility of the vehicles rolling, set
the parking brake firmly on both vehicles involved in
the jump start procedure. Put an automatic
transmission in PARK (P) or a manual transmission
in NEUTRAL before setting the parking brake.
If you have a four
-wheel-drive vehicle, be sure the
transfer case is not in NEUTRAL (N).
NOTICE:
If you leave your radio on, it could be badly
damaged. The repairs wouldn't be covered by
your warranty.
3. Turn off the ignition on both vehicles. Unplug
unnecessary accessories plugged into the cigarette
lighter or accessory power outlets (if equipped). Turn
off the radio and all lamps that aren't needed. This
will avoid sparks and help to save both batteries.
And it could save your radio!
4. Open both hoods and locate the batteries. Find the
positive (+) and negative (
-) terminals on each
battery. Your vehicle has a remote negative (
-) jump
starting terminal. You should always use this remote
terminal instead of the terminal on the battery. The
remote negative (
-) terminal is located on the front
engine lift bracket and is marked ªGND.º See
ªEngine Compartment Overviewº in the Index for
more information on location.

6-57 Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses and circuit
breakers. This greatly reduces the chance of fires caused
by electrical problems.
Look at the silver
-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one of the identical size
and rating.
If you ever have a problem on the road and don't have
a spare fuse, you can borrow one that has the same
amperage. Just pick some feature of your vehicle that
you can get along without
-- like the radio or cigarette
lighter
-- and use its fuse, if it is the correct amperage.
Replace it as soon as you can.
Air Conditioning Refrigerant Capacity
If you do your own service work, you'll need the proper
service manual. See ªDoing Your Own Service Workº in
the Index for additional information. It is recommended
that service work on your air conditioning system be
performed by a qualified technician.Engine Compartment Fuse Block
The fuse block is located under the hood in the engine
compartment on the driver's side of the vehicle. See
ªEngine Compartment Overviewº in the Index for more
information on location.
Remove the cover by turning the fastener
counterclockwise. To reinstall the fuse panel cover, push
in and turn the fastener clockwise.

6-63
Fuse Usage
35 Blank
36 HVAC B
37 Front Parking Lamps
38 Left Turn Signal
39 HVAC 1
40 TBC 4
41 Radio
42 TR PARK
43 Right Turn Signal
44 HVAC
45 Rear Fog Lamps
46 Auxiliary Power 1
47 Ignition 0
48 Four
-Wheel Drive
49 Blank
50 TBC IG
51 Brakes
52 TBC RUN
Replacement Bulbs
Lamps Number
Halogen Headlamps
Low Beam 9006 HB4. . . . . . . . . . . . . . . . . . . . . . . .
High Beam 9005 HB3. . . . . . . . . . . . . . . . . . . . . . .
Front Sidemarker Lamps 194. . . . . . . . . . . . . . . . . . .
Front Turn Signal Lamps 3457. . . . . . . . . . . . . . . . . .
Tail and Stoplamps 3057. . . . . . . . . . . . . . . . . . . . . . .
Rear Turn Signal Lamps 3057. . . . . . . . . . . . . . . . . .
For any bulb not listed here contact your dealer.
Capacities and Specifications
Engine Specifications
Engine Description ªVORTECº 4200. . . . . . . . . . . .
Type L6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIN Code S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Firing Order 1
-5-3-6-2-4 . . . . . . . . . . . . . . . . . . . . . .
Spark Plug Gap 0.050 inches (1.25 mm). . . . . . . . . .