air conditioning GMC SIERRA 1995 Owners Manual

Comfort Controls and Audio Systems
Secfion
In this section you’ll find out how to operate the comfort control systems
and audio systems offered with your vehicle. Be sure to read about the
particular system supplied with your vehicle.
Comfort Controls
Heater Controls
If your vehicle does not have air conditioning, your heater controls will look
like this.
The knob on the left side of the heating system control panel controls the
fan speed. The knob has four speed positions. To increase the air flow, move
the
knob toward HI. To decrease the air flow, move it toward LO. To turn
the fan off, move the knob to
OFF.
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The middle knob on the control panel lets you select the relative
temperature
of the air flowing into the passenger area of your vehicle. This
knob will allow you to adjust the relative air temperature independently of
the function knob setting. Move the knob right toward the red area
for
warmer air. Move the knob left toward the blue area for cooler air.
The right knob on the control panel changes the heater setting.
VENT -This setting, with the arrow pointing at
the figure’s head, directs
air through the instrument panel vents.
VENT/HEAT
- Use this setting, with the arrows pointing at the figure’s
feet and head, to divide airflow between the heater floor vents and
instrument panel vents.
HEAT - This setting, with the arrow pointing at the figure’s feet, directs air
through the heater floor vents. This setting is useful for cold weather.
HEAT/DEFROST
- Use this setting, with the arrow pointing at the figure’s
feet and the defroster symbol near the figure’s head, to divide airf-low
between the heater floor vents and windshield.
DEFROST
- This setting with the defrost symbol directs air through the
windshield defroster vents. This setting is useful when
you have fog or ice
on the windshield.
The control knob can be placed
in any position between two heater settings
to blend the flow
of air. The closer the knob is to a setting symbol, the more
the air flow will represent that symbol’s air
flow arrows.
Heater/Air Conditioning Controls
If your vehicle has air conditioning, your heatedair conditioning controls
will
1,ook like this.
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Before using your vehicle's air conditioning. open the windows to clear the.
vehicle of hot air.
Using the recirculation function can also help. See "Recirculation Buttor:"
in this section for more information.
The knob on the left side of the heating system control panel controls the
fan speed. The knob has four speed positions. To increase the air
flow. move
the knob toward
HI. To decrease the air flow. move it toward LO. To turn
the fan off. move the knob
to OFF. If you have the air conditioner on.
moving the fan knob
to OFF also turns off' the A/C compressor.
The middle knob on the control panel lets you select the relative
temperature of the air flowing into the passenger
area of your vehicle. This
knob
will allow you to adjust the relative air temperature independently of'
the function knob setting. Move the knob right toward the red area for
warmer air. Move the knob left toward the blue area for cooler air. With
A/C
on, move the knob to MAX for maximum cooling.
This setting puts the system
in the recirculation mode and helps to maximize
your air conditioner's performance and your vehicle's fuel economy. This
setting also cools the air the fastest. After the vehicle's interior reaches
a
comfortable temperature, move the knob clockwise to place the air
conditioning system
in the normal mode.
The right knob
on the control panel changes the heatedair conditioning
setting.
VENT - This setting, with the arrow pointing at the figure's head. directs
air through the instrument panel vents.
VENT/HEAT
- Use this setting, with the arrows pointing at the figure's
feet and head, to divide airflow between the heater floor vents and
instrument panel vents.
HEAT
- This setting. with the arrow pointing at the figure's feet. directs air
through the heater floor vents. This setting is useful for cold weather.
HEAT/DEFROST
- Use this setting, with the arrow pointing at the figure's
feet and the defroster symbol near the figure's head. to divide airflow
between the heater floor vents and windshield.
DEFROST
- This setting with the defrost symbol directs air through the
windshield defroster vents. This setting is useful when you have fog
or ice
on the windshield.
The control knob can be placed
in any position between two heatedair
conditioning settings to blend the flow
of air. The closer the knob is to a
setting symbol, the more the air flow will represent that symbol's air flow
arrows.
RECIRCULATION
BUTTON - This button, between the left and middle
knobs, allows the air inside your vehicle
to be recirculated. This setting
helps to maximize your air conditioner's performance and your vehicle's
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To turn on the rear
window defogger,
press the rear defog
button
next to the fan
control knob.
‘he rear window defogger
will only work if the ignition switch is turned to
:UN.
‘ou can turn the defogger off at any time by pressing the button again. The
efogger
will shut itself off after several minutes, so that the glass does not
et too hot.
If the defogger shuts off, and the window still isn’t clear, turn on
le defogger again.
Ventilation System
Your vehicle‘s
ventilation system
supplies outside air
to
the inside of your
vehicle when
it is
moving. With the side
windows closed, air
will flow into the front
air inlet grilles,
through the vehicle, and out the rear air
exhaust valve.
Outside air
will also enter the vehicle when the heater or the air
conditioning fan is running, unless you have the recirculation button pushed
in.
For more information see “Recirculation Button’‘ in this section.
Ventilation Tips
Keep the hood and front air inlet free of ice, snow, or any other
obstruction (such
as leaves). The heater and defroster will work far
better, reducing the chance
of fogging the inside of your windows.
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A CAUTION:
If your vehicle has air conditioning, the auxiliary electric fan
under the hood can
start up even when the engine is not running
and can injure you. Keep hands, clothing and
tools away from
any underhood electric fan.
-
NOTICE:
Ignoring these steps could result in costly damage to your
vehicle that wouldn’t be covered by your vehicle warranty.
Trying to start your vehicle by pushing or pulling it could
damage your vehicle, even if you have a manual transmission.
And if you have an automatic transmission,
it won’t start that
way.
To Jump Start Your Vehicle
1. Check the other vehicle. It must have a 12-volt battery with a negative
ground system.
NOTICE:
If the other system isn’t a 12-volt system with a negative
ground, both vehicles can be damaged.
If you have a diesel engine vehicle with two batteries (or more), you
should know before you begin that, especially in cold weather, you may
not be able to get enough power from a single battery
in another
vehicle to start your diesel engine.
If your vehicle has more than one battery, use the battery that’s on the
passenger side
of the vehicle - this will reduce electrical resistance.
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.
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Cooling System - Gasoline Engines
When you decide it’s safe to lift the hood, here’s what you’ll see:
A. Coolant recovery tank
B. Engine fan(s)
C. Radiator pressure cap
I A CAUTION:
If your vehicle has air conditioning, the auxiliary electric fan
under the hood can start up even when the engine is not runn\
ing
and can injure you. Keep hands, clothing and tools away from any underhood electric fan.
If the coolant inside the coolant recovery tank is boiling, don’t do anything
else
until it cools down.
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Cooling System - Diesel Engines
When you decide it‘s safe to lift the hood, here’s what you’ll see:
A. Coolant surge tank pressure cap
B. Engine fan(s)
C. Radiator
A CAUTION:
If your vehicle has air conditioning, the auxiliary electric fan
under the hood can start up even when the engine is not running
and can injure you. Keep hands, clothing and tools away from
any underhood electric fan.
If the coolant inside the coolant surge tank is boiling, don’t do anything else
until it cools down.
The coolant level
should be
at or above
the
COLD mark. If it
isn’t,
you may have a
leak in the radiator
hoses, heater hoses,
radiator, water pump
or somewhere else in
the cooling system.
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Checking Things Under the Hood
Hood Release
To open the hood, first
pull the handle inside
the vehicle.
Then go to the front of
the vehicle and pull up
on the secondary hood
release, located just to
the passenger side
of
the center of the grill.
Lift the hood.
Your vehicle,
if it has
air conditioning, may
have a auxiliary
engine fan in addition
to the belt driven fan.
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A CAUTION:
If your vehicle has air conditioning, the auxiliary engine fan
under the hood can start up and injure you even when the
engine is not running. Keep hands, clothing and tools
away from
any underhood electric fan.
A CAUTION:
Things that burn can get on hot engine parts and start a fire.
These include liquids like gasoline or diesel fuel, oil, coolant,
brake fluid, windshield washer and other fluids, and plastic
or
rubber. You or others could be burned. Be careful not to drop or
spill things that
will burn onto a hot engine.
Before closing the hood, be sure
all filler caps are on properly. Pull down
the
hood and close it firmly.
Cleaning Your Diesel Engine
I NOTICE:
If you spray or pour water or any other liquid on your engine
when it is warm or hot, or when it
is running, you could cause
serious damage to it.
If you ever clean the engine, clean it only
when it is cold.
Noise Control System
The following information relates to compliance with Federal noise
emission standards for vehicles with a Gross Vehicle Weight Rating
(GVWR)
of more than 10,000 pounds (4 536 kilograms). The Maintenance
Schedule booklet provides information on maintaining
the noise control
system to minimize degradation of the noise emission control system during
the life of your vehicle. The noise control system warranty is given in your
Warranty booklet.
These standards apply only
to vehicles sold in the United States.
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Windshield Wiper Blade Inserts
To replace the
windshield wiper
blade insert, lift
the
wiper arm and rotate
the blade until
it is
facing away from the
windshield.
Unlatch the end
of the insert from the holding clips. Remove the insert and
slide
a new one in place. Make sure the blade is secured in the clips.
Air Conditioning
Every now and then have your dealership check your air conditioning
system to be sure it
has not lost any cooling ability. If you think the system
is not working properly, have your dealership check it out as soon as
possi bleb
The air conditioning will
not work when the temperature is below 40°F
(4°C).
Fluid Leak Check
After the vehicle has been parked for a while, inspect the surface under the
vehicle for water, oil, fuel
or other fluids. Water dripping from the air
conditioning system after it has been used is normal.
If you notice fuel leaks
or fumes, the causes should be found and corrected at once.
Lock Cylinders
To be sure your locks operate properly, they must be lubricated. Your
vehicle’s maintenance schedule will tell you how often to lubricate them.
See “Recommended Fluids and Lubricants” in the Index for
the proper
lubricant to use.
You should
not use penetrating oils because they could wash out the factory
installed lubricant and cause
the lock to bind. De-icers which contain
alcohol could also
wash away the lubricant, so be sure to lubricate the lock
after using
a de-icer of this type.
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