air conditioning GMC ENVOY 1998 Owners Manual

Section 3 Comfort Controls and Audio Systems
In this section, you’ll find out how to operate the comfort control and audio systems offered with your vehicle. Be
sure to read about the particular systems supplied with your vehicle.
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3
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3-5
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3-6
3-7
3-8
3-8
3-8
Comfort Controls Electronic Climate Control System
Air Conditioning
Heating
Ventilation System
Defogging and Defrosting
Rear Window Defogger
Audio Systems Setting the Clock
AM-FM Stereo with Cassette
Tape Player 3- 12
3- 16
3-18
3-2 1
3-23
3-23
3-24
3-26
3-26
3-26
AM-FM Stereo with Compact Disc Player
(If Equipped)
Rear Seat Audio (RSA)
Console-Mounted CD Changer
Theft-Deterrent Feature
Understanding Radio Reception
Tips About Your Audio System
Care of Your Cassette Tape Player
Care
of Your Compact Discs
Care of Your Compact Disc Player
Fixed Mast Antenna
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Mode Knob - Automatic Operation
The right knob on the control panel allows you to
choose the direction of air delivery. When the system is
set for automatic operation, sensors will control the air
delivery mode.
Air will come primarily from the floor or
instrument panel outlets, with some air directed to the
windshield to prevent fogging.
When the system is in AUTO mode, the air conditioning
light will turn on, and the recirculation and outside air
lights turn
off. With the system in full auto control
(both the fan and mode knobs
in AUTO), you still have
the ability to override any function. However,
continually overriding the outside air or the
A/C
compressor will limit the ability of the system to cool
the vehicle quickly.
If you push a button for a function which is nor
available, the light next to that button will flash three
times to alert you that it’s not available.
To find your comfort zone, start with the
74°F (23 O C)
setting and allow about 20 minutes for the system to
adjust the temperature if necessary.
With the automatic setting, the
air conditioning compressor
automatically cycles when needed to cool the
air. In cold
weather, when the system senses the need for heat, the
airflow
will be directed out the floor outlets. As the interior temperature approaches the desired setting, the
blower speed will decrease. To maintain interior comfort,
the &ow will adjust between the instrument panel
air
outlets and floor outlets. On bright sunny days in cool
weather, the alrflow may come out
of the air conditioning
and floor outlets (bi-level mode) to maintain comfort and
prevent stuffiiess.
To avoid blowing cold
air in cold weather, the system will
delay turning on the fan until warm
air is available. The
length of delay depends on the outside
air temperature,
engine coolant temperature or the time since the engine was last started.
As the coolant warms up, the blower fan
speed will gradually increase and
air will flow from the
heater outlets, with some airflow to
the windshield to
prevent fogging under most normal conditions.
If your vehicle is sitting out on a warm day and you
have the fan set on AUTO, the air will first flow out of
the floor air outlets
for a few seconds. That is normal.
This is to expel hot air from the air outlets.
As the air is
cooled, the airflow will move through the
air
conditioning outlets.
Be careful not to put anything over the solar sensor
located around the center of the instrument panel.
This sensor is used by the automatic system to
regulate temperature.
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Mode Knob - Manual Operation
The right knob on the control panel allows you to
choose the direction
of air delivery.
You can choose to set the climate control system
operations yourself, or let the system work for you by
placing the system
in AUTO mode. See “Mode
Knob
- Automatic Operation” earlier in this section.
/J PANEL: This setting directs most of the air
through the instrument panel outlets and a small amount
through the floor outlets.
’@ BI-LEVEL: Air is delivered through the heater
floor outlets as well as the instrument panel outlets.
+# HEATER: This setting directs most of the
warmed air through the heater floor outlets and some air
through the windshield defroster outlets.
‘/J BLEND: Airflow is divided equally between the
heater floor outlet and the windshield defroster outlets.
The air conditioning compressor may run
to dehumidify
the air to prevent window fogging.
+0
-bo
0
WO
DEFROST This setting directs most air through
the windshield defroster outlets and some through the
heater outlets. The air conditioning compressor may
run
to dehumidify the air to prevent window fogging.
a OUTSIDE AIR: Press this button to force the
system to
use outside air. Press it again to close off the
outside air.
Pressing the
OUTSIDE AIR button will cancel the
RECIRCULATION button.
RECIRCULATION: Press this button to limit
the amount
oi’ fresh air entering your vehicle. This is
helpful when
you are trying to limit odors entering your
vehicle. In the AUTO mode, the system will use
recirculation as necessary to cool
the air. Pressing the
recirculation button will change the operation to
a
manual mode and the air will recirculate non-stop.
RECIRCULATION may be selected
with the fan control
in OFF to limit odors, outside air and dust from entering
your vehicle.
Pressing the RECIRCULATlON button will cancel the
OUTSIDE AIR button.
a A/C: Press this button to turn the air conditioning
on and off. The system will cool and dehumidify the air
inside the vehicle
when the A/C light is on.
Air conditioning will be automatically disabled when
the outside temperature drops below a level which air
conditioning is ineffective.
Remember that
in order for the automatic system to perform
well,
it needs A/C to provide cooling performance.
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Air Conditioning
On hot days, open the windows long enough to let hot
inside air escape. This reduces the time
it takes for your
vehicle to cool down. Then keep your windows closed
for the air conditioner to work its best.
Heating
For quick cool-down on very hot days, A/C should be
enabled with the temperature knob turned
to the left and
the OUTSIDE
AIR button should not be active. This
setting should be used to keep odors and/or dust from
entering the vehicle. For normal cooling on hot days,
use
A/C with the temperature knob turned to the left.
On cool but sunny days, use BI-LEVEL
A/C to deliver
warm air to the floor and cooler air to the instrument
panel outlets.
When the air conditioner is on, you may sometimes
notice slight changes
in your vehicle’s engine speed
and power.
This is normal because the system is
designed to cycle the compressor on and off to keep the
desired temperature. The heater
works best
if you keep your windows closed
while using it.
On cold days, use HEATER with the
temperature knob turned
to the right. BLEND is useful
in cool weather when
you have fog or ice on the
windshield
or side windows.
If you use the optional engine coolant heater before
starting your engine, your heating system will produce
warmer air faster to heat the passenger compartment in
cold weather. See “Engine Coolant Heater”
in the Index.
Ventilation System
For mild outside temperatures when little heating or
cooling is needed, use PANEL with the OUTSIDE
AIR
button enabled to direct outside air through your vehicle.
Airflow is through the instrument panel outlets.
Your vehicle’s ventilation system supplies outside air to
the inside
of your vehicle when it is moving. When the
vehicle is not moving, you can get outside air to flow
through by selecting
any mode and any fan speed.
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Section 6 Service and Appearance Care
Here you will find information about the care of your vehicle. This section begins with service and fuel information,
and then
it shows how to check important fluid and lubricant levels. There is also technical information about your
vehicle, and a part devoted
to its appearance care.
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6-3
6-5
6-5
6-7
6-8
6-
10
6-14
6- 15
6-19
6-20
6-2
1
6- 24
6-25
6-25
6-26
6-
2’7
Service
Fuel
Fuels in Foreign Countries
Filling Your Tank
Filling a Portable
Fuel Container
Checking Things Under the Hood
Engine Oil
Air Cleaner
Automatic Transmission Fluid
Rear Axle
Four- Wheel Drive
Engine Coolant
Radiator Pressure Cap
Thermostat
Power Steering Fluid
Windshield Washer Fluid
Brakes Battery
Bulb Replacement
Windshield Wiper Blade Replacement
Tires
Appearance Care
Cleaning the Inside
of Your Vehicle
Care of Safety Belts
Cleaning the Outside of Your Vehicle
Appearance Care Materials Chart
Vehicle Identification Number (VIN)
Service Parts Identification Label
Electrical System
Replacement Bulbs
Capacities and Specifications
Air Conditioning Refrigerants
6-30
6-3
1
6-34
6-36
6-45
6-46
6-48
6-50
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6-54
6-54
6-54
6- 60
6- 60
6-62
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Name
RT TRN
RR PRK
TRL PRK
LT HDLP
RT HDLP
LT HI
RT HI
FR PRK
INT BAT
ENG
I
ECM B
ABS
ECM
1
HORN
BTS
I
BIU LP
IGN E
AIC
RAP
OXYSEN
Usage
Right Turn Signal Rear
Right Rear Parking Lamps
Trailer Park Lamps Left Headlamp
Right Headlamp
Left High Beam
Right High Beam
Front Parking Lamps
I/P Fuse Block Feed
Engine SensorsISolenoids, MAP,
CAM. PURGE, VENT
Engine Control Module, Fuel Pump,
Module, Oil Pressure
Anti-Lock Brake System
Engine Control Module Injectors Horn
Brake-Transmission Shift Interlock
Back-up
Lalllps
Engine
Air Conditioning
Retained Accessory Power
Oxygen Sensor
Name
IGN B
DRL
FOG LP
IGN
A
STUD #2
PARKLP
LR PRK
IGN C
HTDSEAT ATC
RRDFOG
HVAC
TRCHMSL
RR W/W
CRANK
LD LEV
HI BEAM
HAZLP
VECHMSL
HTDMIR
STOPLP
TBC
Usage
Column Feed, IGN 2, 3,4
Daytime Running Lamps
Fog Lamps
Starting and Charging IGN
I
Accessory Feeds, Electric Brake
Parking La~nps
Left Rear Parking Lamps Starter Solenoid, Fuel Pump. PRNDL
Heated Seat
Electronic Transfer Case
Rear Defogger
HVAC System
Trailer Center High Mount Stop Light
Rear Window Wiper
Clutch Switch, NSBU Switch
Electronic Load Leveling
HID Headlamps Hazard Lamps
Vehicle Center High
Mount Stop Lamp
Heated Mirror
Stoplamps
Truck Body Computer
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Air Conditioning Refrigerants
Not all air conditioning refrigerants are the same. If the
air conditioning system
in your vehicle needs
refrigerant, be sure the proper refrigerant
is used. If
you’re not sure, ask your dealer.
Vehicle Dimensions
Wheelbase .............. 107.0 inches (271.8 cm)
Length ................. 183.8 inches (466.9 cm)
Height ................... 64.2 inches (163.1 cm)
Width
................... 67.8 inches (1 72.2 cm)
Front Tread
............... 57.3 inches ( 145.5 cm)
Rear Tread
............... 55.1 inches (1 39.9 cm)
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Part C: Periodic Maintenance
Inspections
Listed below are inspections and services which should
be performed at least twice
a year (for instance, each
spring and fall).
You should let your dealer S service
department
or other qualified service center do these
jobs. Make sure any necessary repairs are completed
at once.
Proper procedures to perform these services may be
found in
a service manual. See “Service and Owner
Publications” in the Index.
Steering, Suspension and Front Drive Axle
Boot and Seal Inspection
Inspect the front and rear suspension and steering
system for damaged, loose or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook-up, binding, leaks,
cracks, chafing, etc. Clean and then inspect the drive
axle boot seals for damage, tears or leakage. Replace
seals if necessary.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the body
near the exhaust system.
Look for broken, damaged,
missing or out-of-position parts
as well as open seams,
holes, loose connections or other conditions which could
cause a heat build-up in the floor pan or could let
exhaust fumes into the vehicle. See “Engine Exhaust’’ in
the Index.
Engine Cooling System Inspection
Inspect the hoses and have them replaced if they are
cracked, swollen or deteriorated. Inspect all pipes,
fittings
and clamps; replace as needed. Clean the outside
of the radiator and air conditioning condenser.
To help
ensure proper operation,
a pressure test of the cooling
system and pressure cap is recommended at least
once a year.
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Section 9 Index
Accessory Inf’lator ............................. 2-50
Acces~~ty
POWC~ Outlets ......................... 2-52
Adcling Sound Equilm1cnt
........................ 3-23
Add-On Equiptnent
............................. 4-43
Air Bag
Adding Equipment ............................ 1-27
How Does it Restrain .......................... 1-25
How it Works ................................ I -23
Location
.................................... 1-23
Readiness Light
......................... 1-22 . 2-63
Servicing
................................... 1-27
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
Refripxants
................................. 6-62
Alignment
and Balancc. Tire ...................... 6-13
Atltenn.1.
Fi~d ................................. 3-26
Adcling
Equipment
to the Outside of’ Your Vehicle ...... 6-3
AllIt11inLll11 Wheels . Clea11i11~ ...................... 6-5 1
Anti-Lock Brake System Wa~ming Light ......... 2-66 . 4-7
Appearance
Care ............................... 6-45
Materials
.................................... 6-53
Arbit~-ation Program .............................. 8-9
Ar111rest . Storage ............................... 2-15 Ashtrays
...................................... 2-49
Audio Systems ............................. 3-8. 3-12
Automatic Headlamp System
...................... 2-37
Automatic Transmission Check
...................................... 7-40
Fluid ....................................... 6-15
Operation ................................... 2-18
Park Mechanism Check ........................ 7-42
Shiftin
...................................... 2-18
Starting Your Engine
.......................... 2-15
Front ....................................... 6-21
Rear
....................................... 6-19
Axle
Backglass Wiper. Blade Replacement
.............. 6-36
Battery
....................................... 6-30
Charge LiFht ................................ 2-63
Jump
Startmg ................................. 5-3
Replacement, Keyless
Entry ..................... 2-8
Warnings ................................ 5-3, 5-4
Battery Run-Down Protection ..................... 2-44
BBB Auto
Line ................................. 8-9
Better Business Bureau Mediation
................... 8-9
Blizzard ...................................... 4-38
Brake Fluid .................................... 6-27
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