1999 GMC SAFARI Owner's Manual

2-70
CAUTION:
Don't keep driving if the oil pressure is low.
If you do, your engine can become so hot that
it catches fire. You or others could be burned.
Check your oil as soon as possible and have
your vehicle serviced.
NOTICE:
Damage to your engine from neglected oil
problems can be costly and is not covered by
your warranty.
Security Light
This light will come on
briefly when you turn the
key to START.
The light will stay on until the engine starts. If the light
flashes, the Passlock

System has entered a tamper
mode. If the vehicle fails to start, see ªPasslockº in
the Index.
If the light comes on continuously while driving and
stays on, there may be a problem with the Passlock
System. Your vehicle will not be protected by Passlock,
and you should see your GM dealer.

2-71 Service AWD Light (If Equipped)
This light should come on
briefly when you turn on the
ignition, as a check to show
you it is working.
The SERVICE AWD light comes on to indicate that
there may be a problem with the drive system and
service is required. Malfunctions can be indicated by the
system before any problem is apparent, which may
prevent serious damage to the vehicle. This system is
also designed to assist your service technician in
correctly diagnosing a malfunction.
Daytime Running Lamps Indicator Light
You will have this light
on the instrument panel.
It goes on whenever the
Daytime Running Lamps
(DRL) are on.
When it begins to get dark, the DRL indicator light is a
reminder to turn on your headlamps.
Check Gages Light
This light will come on
briefly when you are
starting the engine.
If the light comes on and stays on while you are
driving, check your various gages to see if they are
in the warning zones.

2-72 Fuel Gage
The fuel gage tells you
approximately how much
fuel you have remaining
when the ignition is on.
When the gage first indicates E (Empty), you still
have a little fuel left, but you should get more fuel as
soon as possible.Here are things some owners ask about. None of these
indicate a problem with your fuel gage:

At the gas station, the gas pump shuts off before
the gage reads F (Full).

The fuel tank will take either a little more or a little
less fuel to fill up than the gage shows.

The gage moves a little when you turn a corner or
speed up.

The gage doesn't go back to E (Empty) when you
turn off the ignition.

3-
3-1
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.
3
-2 Comfort Controls
3
-2 Heating/Air Conditioning System
3
-3 Heating System
3
-4 Rear Heating System (Option)
3
-5 Rear Air Conditioning System (Option)
3
-5 Air Conditioning
3
-6 Heating
3
-6 Defrosting
3
-6 Ventilation System
3
-8 Rear Window Defogger (Option)
3
-9 Audio Systems
3
-9 Setting the Clock for Systems with
SET Button
3
-9 Setting the Clock for Systems with HR
and MN Buttons
3
-10 AM-FM Stereo3
-12 AM-FM Stereo with Cassette Tape Player
(If Equipped)
3
-15 AM-FM Stereo with Cassette Tape Player
and Automatic Tone Control (If Equipped)
3
-19 AM-FM Stereo with Compact Disc Player
and Automatic Tone Control (If Equipped)
3
-24 Rear Seat Audio (If Equipped)
3
-26 Remote Compact Disc Player (If Equipped)
3
-28 Theft-Deterrent Feature (If Equipped)
3
-30 Understanding Radio Reception
3
-30 Tips About Your Audio System
3
-31 Care of Your Cassette Tape Player
3
-33 Care of Your Compact Discs
3
-33 Care of Your Compact Disc Player
3
-33 Fixed Mast Antenna

3-2
Comfort Controls
This section tells you how to make your air system work
for you.
With these systems, you can control the heating, cooling
and ventilation in your vehicle. Your vehicle also has a
flow
-through ventilation system described later in
this section.
Heating/Air Conditioning System
If your vehicle has air conditioning, your heating/air
conditioning controls will look like this.Fan Knob
This control has four positions. To increase airflow,
turn the knob toward HI. To decrease airflow, move it
toward LO.
Temperature Knob
This knob is next to the fan knob. It controls the
temperature of the air flowing into your vehicle. Turn
the knob clockwise for warmer air. Turn the knob
counterclockwise for cooler air.
Function Knob
This knob is next to the temperature knob.
OFF: This setting turns the system off.
MAX A/C: This cools the air the fastest, by
recirculating the inside air. Turn the temperature knob
all the way to MAX A/C.
A/C: This setting brings in outside air and cools it.

3-3
BI-LEVEL: This setting brings in outside air and
blows it out through the heater floor vents and the
instrument panel vents. If you move the temperature
knob between hot and cold, cooler air will come out of
the upper vents while warmer air comes out of the floor
vent. The air conditioning compressor may operate in
this setting to cool the air.
VENT: The air comes out at the vents on your
instrument panel. The air conditioning compressor will
not run in this position. Adjust the temperature knob for
warmer or cooler air.
HEATER: Most of the air comes out near the
floor. The rest comes out from the defroster vents under
the windshield and at the front side windows.
BLEND: With this setting, the heated outside air
comes out of both the heater vents and defroster vents.
Adjust the temperature knob for warmer or cooler air.
The air conditioning compressor may operate in this
setting to dehumidify the air.
DEFROST: This setting operates the defroster.
Most of the air comes out near the windshield, with
some going to the floor vents and front side windows.
The air conditioning compressor may operate in this
setting to dehumidify the air.
Heating System
If your vehicle does not have air conditioning, your
heater controls will look like this.
Fan Knob
This control has four positions. To increase airflow,
turn the knob toward HI. To decrease airflow, move it
toward LO.
Temperature Knob
This knob is next to the fan knob. It controls the
temperature of the air flowing into your vehicle. Turn
the knob clockwise for warmer air. Turn the knob
counterclockwise for cooler air.

3-4
Function Knob
This knob is next to the temperature knob. The function
knob allows you to choose the direction of air delivery.
OFF: This setting turns the system off.
VENT: The air comes out at the vents on your
instrument panel.
BI-LEVEL: With this setting, the heated outside
air comes out both the instrument panel vents and heater
vents. Adjust the temperature knob for warmer or
cooler air.
HEATER: Most of the air comes out near the
floor. The rest comes out from the defroster vents under
the windshield and at the front side windows.
BLEND: With this setting, the heated outside air
comes out both the heater vents and defroster vents.
Adjust the temperature knob for warmer or cooler air.
DEFROST: This setting operates the defroster.
Most of the air comes out near the windshield, with
some going to the floor vents and front side windows.
Rear Heating System (Option)
You may have the optional rear heater. The three-speed
fan switch is to the right of the radio. Turn the switch
toward HIGH for higher airflow in the rear area. Turn
the switch to the OFF position to turn the system off.

3-5 Rear Air Conditioning System (Option)
You may have rear air conditioning. The rear air
conditioning switch is located to the right of the heater
controls. Turn the switch toward HIGH for higher
airflow in the rear area. Turn the switch to the OFF
position to turn the system off.
Air Conditioning
Before using your vehicle's air conditioning, open the
windows to clear the vehicle of hot air. This reduces the
time it takes for your vehicle to cool down. Then keep
your windows closed for the air conditioner to work at
its best.
You can use MAX A/C with the temperature knob in the
blue area when it's really hot outside and you need to
cool the inside air quickly. MAX A/C lets in only a little
air from the outside.
If you first use MAX A/C, you can then use A/C with
the temperature knob in the blue are as soon as the
vehicle has cooled down, so outside air will be going
through your vehicle.
If your vehicle has rear air conditioning, setting it on
LOW may enhance the front A/C performance by
allowing trapped refrigerant in the rear lines to circulate.
The rear air conditioning system will only send cooled
air if the front system is on. It can still be used to
circulate air, even if the front system is off.
When the air conditioning, DEFROST or BLEND is on,
you may notice a slight increase or decrease in engine
speed, due to compressor operation. This is normal
because the system is designed to cycle the compressor
on and off to keep the desired temperature.