1999 GMC ENVOY audio

yellowblue
3-17
The rear seat passengers have control of the volume for
each set of headphones. Be aware that the front seat
audio controls always override the Rear Seat Audio
(RSA) controls. Note that if the front seat passengers
switch the source for the primary radio to a remote
source, the RSA will play the same remote source. The
rear speakers will be muted when the RSA power is
turned on. You may operate the RSA functions even
when the primary radio power is off.
Note that this feature is intended for rear
seat passengers.
The following function is controlled by the primary
radio knob:
PWR
-VOL: Push this knob twice to turn RSA off.
The following functions are controlled by the RSA
system buttons:
PWR: Press this button to turn RSA on or off.
VOL: Press this knob lightly so it extends. Turn the
knob clockwise to increase volume and
counterclockwise to decrease volume. Push the knob
back into its stored position when you're not using it.
The left VOL knob controls the left headphone and the
right VOL knob controls the right headphone.AM
-FM: Press this button to switch between AM, FM1
and FM2. If the front passengers are already listening to
AM
-FM, the RSA controller will not switch between the
bands and cannot change the frequency.
SEEK: While listening to AM
-FM, press the right
arrow to tune to the next higher station and stay there.
Press the left arrow to tune to the next lower station and
stay there. The sound will mute while seeking. The
SEEK button is inactive if the AM
-FM mode on the
front radio is in use.
While listening to a cassette tape, press the right arrow
to hear the next selection on the tape. Press the left
arrow to go back to the previous selection. The SEEK
button is inactive if the tape mode on the front radio is
in use.
While listening to a CD, press the right arrow to hear the
next selection on the CD. Press the left arrow to go back
to the start of the current selection (if more than eight
seconds have played). The SEEK button is inactive if
the CD mode on the front radio (if equipped) or the CD
changer is in use.
ProCarManuals.com

yellowblue
3-23
Disabling the Theft-Deterrent Feature
Enter your secret code as follows; pause no more than
15 seconds between steps:
1. Turn the ignition to ACCESSORY or RUN.
2. Turn the radio off.
3. Press the 1 and 4 buttons together. Hold them down
until SEC shows on the display.
4. Press MN and 000 will appear on the display.
5. Press MN again to make the last two digits agree
with your code.
6. Press HR to make the first one or two digits agree
with your code.
7. Press AM
-FM after you have confirmed that the
code matches the secret code you have written down.
The display will show
---, indicating that the radio is
no longer secured.
If the code entered is incorrect, SEC will appear on the
display. The radio will remain secured until the correct
code is entered.
When battery power is removed and later applied to a
secured radio, the radio won't turn on and LOC will
appear on the display.To unlock a secured radio, see ªUnlocking the
Theft
-Deterrent Feature After a Power Lossº earlier in
this section.
Audio Steering Wheel Controls
You can control certain radio functions using the buttons
on your steering wheel.
PROG: Press this button to
play a station you have
programmed on the radio
preset buttons on the
selected band.
If a cassette tape is playing, press this button to play the
other side of the tape. If a compact disc is playing in the
console
-mounted CD changer, press this button to go to
the next available CD.
ProCarManuals.com

yellowblue
3-24
SEEK: Press the up arrow to tune to the next radio
station and the down arrow to tune to the previous
radio station.
If a cassette tape or compact disc is playing, the player
will advance with the up arrow and reverse with the
down arrow.
MUTE: Press this button to
silence the system. Press it
again to turn on the sound.
VOL: 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.
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.
ProCarManuals.com

yellowblue
6-31
Battery
Your new vehicle comes with an ACDelco Freedom

battery. When it's time for a new battery, we recommend
an ACDelco Freedom battery. Get one that has the
replacement number shown on the original
battery's label.
Vehicle Storage
If you're not going to drive your vehicle for 25 days or
more, remove the black, negative (
-) cable from the
battery. This will help keep your battery from
running down.
CAUTION:
Batteries have acid that can burn you and gas
that can explode. You can be badly hurt if you
aren't careful. See ªJump Startingº in the Index
for tips on working around a battery without
getting hurt.
Contact your dealer to learn how to prepare your vehicle
for longer storage periods.
Also, for your audio system, see ªTheft
-Deterrent
Featureº in the Index.
Bulb Replacement
Before you replace any bulbs, be sure that all the lamps
are off and the engine isn't running. See ªReplacement
Bulbsº in the Index.
For any bulb changing procedure not listed in this
section, contact your GMC dealer's service department.
ProCarManuals.com

yellowblue
6-56
Fuse/Circuit
BreakerUsage
A Not Used
B Not Used
1 Not Used
2 Cigarette Lighter, Data
Link ConnectorFuse/Circuit
BreakerUsage
3 Cruise Control Module and Switch,
Body Control Module, Heated Seats
4 Gages, Body Control Module,
Instrument Panel Cluster
5 Parking Lamps, Power Window
Switch, Body Control Module,
Ashtray Lamp
6 Steering Wheel Audio Control
Illumination
7 Headlamp Switch, Body Control
Module, Headlamp Relay
8 Courtesy Lamps, Battery Run
-Down
Protection
9 Not Used
10 Turn Signal
11 Cluster, Engine Control Module
12 Interior Lights
13 Auxiliary Power
ProCarManuals.com

yellowblue
6-57
Fuse/Circuit
BreakerUsage
14 Power Locks Motor
15 4WD Switch, Engine Controls
(VCM, PCM, Transmission)
16 Air Bag
17 Front Wiper
18 Steering Wheel Audio Controls
19 Radio, Battery
20 Amplifier
21 HVAC I (Automatic),
HVAC Sensors (Automatic)
22 Anti
-Lock Brakes
23 Rear Wiper
24 Radio, Ignition
Engine Compartment Fuse Block
The fuse block is under the hood at the driver's side of
the engine compartment.
Remove the cover by turning the fastener
counterclockwise. To reinstall the fuse panel cover, push
in and turn the fastener clockwise.
ProCarManuals.com

yellowblue
7-39
Part B: Owner Checks and Services
Listed in this part are owner checks and services which
should be performed at the intervals specified to help
ensure the safety, dependability and emission control
performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown in
Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuel fill.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. See ªEngine Oilº in the Index for
further details.Engine Coolant Level Check
Check the engine coolant level and add DEX
-COOL

coolant mixture if necessary. See ªEngine Coolantº in
the Index for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the
windshield washer tank and add the proper fluid if
necessary. See ªWindshield Washer Fluidº in the Index
for further details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inflated to the correct pressures.
See ªTiresº in the Index for further details.
Cassette Deck Service
Clean cassette deck. Cleaning should be done every
50 hours of tape play. See ªAudio Systemsº in the Index
for further details.
ProCarManuals.com

9-yellowblue
9-1
Section 9 Index
A
ccessory Inflator 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessory Power Outlets 2-57 . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Equipment to the Outside of Your Vehicle 6-3 . . . . . .
Adding Sound Equipment 3-25 . . . . . . . . . . . . . . . . . . . . . . . .
Add-On Equipment 4-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag
Adding Equipment 1
-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How Does it Restrain 1-25 . . . . . . . . . . . . . . . . . . . . . . . . . .
How it Works 1-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 1-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Readiness Light 1-22, 2-67 . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing 1-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System 1-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What Makes it Inflate 1-25 . . . . . . . . . . . . . . . . . . . . . . . . . .
What You See After it Inflates 1-25 . . . . . . . . . . . . . . . . . . .
When Should it Inflate 1-24 . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner 6-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning 3-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning Refrigerants 6-61 . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance, Tire 6-43 . . . . . . . . . . . . . . . . . . . . . .
Aluminum Wheels, Cleaning 6-51 . . . . . . . . . . . . . . . . . . . . . .
Antenna, Fixed 3-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock Brake System Warning Light 2-69, 4-7 . . . . . . . . .
Anti-Lock Brakes 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care and Materials 6-53 . . . . . . . . . . . . . . . . . . . .
Arbitration Program 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Armrest, Storage 2
-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ashtrays 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Steering Wheel Controls 3-23 . . . . . . . . . . . . . . . . . . . .
Audio Systems 3-8, 3-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Headlamp System 2-40 . . . . . . . . . . . . . . . . . . . . . .
Automatic Transmission
Check 7
-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 2-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Park Mechanism Check 7-42 . . . . . . . . . . . . . . . . . . . . . . . .
Shifting 2-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your Engine 2-16 . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle
Front 6
-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locking Rear 2-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear 6-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Backglass Wiper, Blade Replacement 6-37 . . . . . . . . . . . . . .
Battery 6-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charge Light 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement, Keyless Entry 2-7 . . . . . . . . . . . . . . . . . . . . .
Run-Down Protection 2-43 . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings 5-3, 5-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BBB Auto Line 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Better Business Bureau Mediation 8-4 . . . . . . . . . . . . . . . . . . .
ProCarManuals.com