cooling CHEVROLET LUMINA 1993 1.G Owners Manual

Downloaded from www.Manualslib.com manuals search engine Features & Controls
Engine Coolant Temperature Warning Light
This light tells you that your engine
coolant has overheated or your radiator
cooling fan is not working. If you have
been operating your vehicle under normal driving conditions, you should
pull
off the road, stop your vehicle and
turn the engine
off as soon as possible.
HOT COOLANT CAN BURN YOU
BADLY!
In
Problems on the Road, this manual
shows what to
do. See the Index under
Engine Overheating.
Engine Coolant Temperature
Gage
(OPTION)
If you have the gage cluster, you have a
gage that shows the engine coolant
temperature. If the gage pointer moves
into the red area, your engine is too hot!
That reading means the same thing as
the warning light. It means that your
engine coolant has overheated. If you
have been operating your vehicle under
normal driving conditions, you should
pull
off the road, stop your vehicle and
turn off the engine as soon as possible.
HOT COOLANT CAN BURN
YOU
BADLY!
In
Problems on the Road, this manual
shows what to do. See the
Index under
Engine Overheating.
Low Coolant Warning Light
(v6 ENGINES)
If this light comes on, your system is
low on coolant and the engine may
overheat. See the
Index under Engine
Coolant and have your vehicle serviced
as soon as you can.

Downloaded from www.Manualslib.com manuals search engine Air Conditioning (OPTION)
There are three air conditioning
settings:
MAX: Provides maximum cooling or
quick cool-down on very hot days. This
setting recirculates much of the
air
inside your vehicle, and it should not be
used for long periods because the air
may become too cold and dry.
A/C Use for normal cooling on hot .
days. This setting brings in outside air,
cools it and directs it through the
instrument panel outlets.
BI-LEV Use on cool, but sunny days.
This setting brings in the outside air,
but directs it in two ways, The cool
air
is directed to the upper portion of your
body through the instrument panel
outlets, but most warmed air is directed
through the heater ducts and a little to
the defrost and side window vents. At
times this temperature difference may
be more apparent
than others.
OFF: Press to turn the system off.
Some air will still come from the outlets
at the floor. Press any function button
to turn the system on. On
very hot days, open the windows
long enough to let hot inside air escape.
This reduces the time your air
conditioner’s compressor will have to
run, which should help fuel economy.
The air conditioner compressor operates in
all three air conditioning
settings.
It also operates in BLEND and
ljjjl (Defrost) when the temperqture is
above freezing. This helps remove
moisture from the air inside your
vehicle.

Downloaded from www.Manualslib.com manuals search engine Comfort Controls & Audio Systems
Air Conditioning (CONT.)
Heating and Ventilation
When you don’t need to cool the
outside air, use these next settings.
You
can leave the air as it is or heat it.
The air conditioner compressor doesn’t
run in the
VENT and HEAT settings.
This reduces the engine load, resulting
in improved fuel economy (gas
mileage).
VENT: For mild outside temperatures,
when little heating or cooling is needed,
push
VENT. Air flow is through the
instrument panel outlets. Slide the
temperature control lever to a
comfortable level.
HEAT When outside temperatures are
cold, push
HEAT. This will send most
of the heated air through the ducts near
the floor. The rest will come out of the
defroster vents and side window
defogger vents.
Defogging and Defrosting
There are two settings for clearing your
windows. For each setting, adjust the
temperature control as desired. The air
conditioner compressor will run in
these settings to remove moisture from
the air when the temperature is above
freezing.
BLEND: This setting allows half of the
air to flow to the floor heater ducts, and
half to
go to the windshield and side
window vents located in the windshield
pillars. Use this setting to warm
passengers while keeping the
windshield clear.
The setting directs
90
through the defroster vents and the side
window vents, and
10% to the floor.

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CAUTION
Hill and Mountain Roads
Driving on steep hills or mountains is
different
from driving in flat or rolling
terrain. If you drive regularly in steep
country, or if you’re planning to visit
there, here are some tips that can make
your trips safer and more enjoyable.
Keep your vehicle in good shape.
Check all fluid levels and also the
brakes, tires, cooling system and
transaxle. These parts can work hard
on mountain roads.
Know how to go down hills. The most
important thing to know is this: let
your engine do some of the slowing
down. Don’t make your brakes do it
all. Shift to a lower gear when you go
down a steep or long hill. That way,
you will slow down without excessive
use of your brakes.
I48
A
If you don’t shift down, your
brakes could get
so hot that
they wouldn’t work well.
You
would then have poor braking or even none going down a hill. You could crash. Shift down to let your
engine assist your brakes on a steep
I downhill slope.
Know how to go uphill. You may
want to shift down to a lower gear.
The lower gears help
cool your engine
and transaxle, and you can climb the
hill better.
Stay in your own lane when driving
on two-lane roads in hills or
mountains. Don’t swing wide or cut
across the center of the road. Drive
at
speeds that let you stay in your own
lane. That way, you won’t be surprised by a vehicle coming toward
you in the same lane.
Coasting downhill in
11 It takes longer to pass another vehicle
N (Neutral) or with the when you’re going uphill. You’ll want
ignition off is dangerous. Your to leave extra room to pass.
If a
brakes will have to do all the work vehicle is passing you and doesn’t
of slowing down. They could get so have enough room, slow down to
hot that they wouldn’t work well. make it easier for the other vehicle to
You could crash. Always have your get by.
engine running and your vehicle in
gear when you go downhill.
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Downloaded from www.Manualslib.com manuals search engine Parking on Hills
You really should not park your vehicle,
with a trailer attached,
on a hill. If
something goes wrong, your rig could
start to move. People can be injured,
and both your vehicle and the trailer
can be damaged.
But if you ever have to park your rig
on
a hill, here’s how to do it:
1. Apply your regular brakes, but don’t
shift into
P (Park) yet.
2. Have someone place chocks under
the trailer wheels.
3. When the wheel chocks are in place,
release the regular brakes until the
chocks absorb the load.
4. Reapply the regular brakes. Then
apply your parking brake, and then
shift to
P (Park).
5. Release the regular brakes.
When You are Ready to Leave After
Parking on a
Hill
1. Apply your regular brakes and hold
the pedal down while you:
Start your engine;
Shift into a gear; and
Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear
4. Stop and have someone pick up and
of
the chocks.
store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more
often when you’re pulling a trailer. See
the Maintenance Schedule for more
on
this. Things that are especially
important in trailer operation are
automatic transaxle fluid (don’t
overfill), engine oil, belts, cooling
system, and brake adjustment. Each
of
these is covered in this manual, and the
Index will help you find them quickly. If
you’re trailering, it’s a good idea to
review these sections before you start
your trip.
Check periodically to see that all hitch
nuts and bolts are tight.

Downloaded from www.Manualslib.com manuals search engine .- I
Problems on the Road
hgine Overheating (CONT.)
If you no longer have the overheat
warning, you can drive. Just to be safe,
drive slower for about ten minutes.
If
the warning doesn’t come back on, you
can drive normally.
If the warning continues, pull over,
stop, and park your vehicle right away.
If there’s still
no sign of steam, you can
idle the engine for two or three minutes
while you’re parked, to see
if the
warning stops.
But then, if you still have the warning,
TURN OFF THE ENGINE AND GET
EVERYONE
OUT OF THE VEHICLE
until it cools down.
You may decide not to lift the hood but
to get service help right away.
LAU I IVN
2.2L L4 Cooling System
When you decide it’s safe to lift the
hood, here’s what you’ll see:
(A) Coolant recovery tank
(B) Radiator pressure cap
(C) Electric engine fan
If the coolant inside the coolant
recovery tank is boiling, don’t do
anything else until it cools down.
All V6 Cooling Systems
When you decide it’s safe to lift the
hood, here’s what you’ll see:
(A) Coolant recovery tank
(B) Radiator pressure cap
(C) Electric engine fan
If the coolant inside the coolant
recovery tank is boiling, don’t do
anything else until it cools down.
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Downloaded from www.Manualslib.com manuals search engine I
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.
Heater and radiator hoses,
L L and other engine parts, can
be very hot. Don’t touch them. If
you do, you can be burned.
Don’t run the engine
if there is a
leak. If you run the engine, it could
lose all coolant. That could cause
an engine fire, and you could be
burned. Get any leak fixed before
you drive the vehicle.
1 NOTlCE CAUTION
If you haven’t found a problem yet, but
the coolant level isn’t at or above
COLD, add a 50/50 mixture of clean
water
(preferably distilled) and a proper
antifreeze at the coolant recovery tank.
(See the
Index under Engine Coolant
for more information about the proper
coolant mix.)
-l
A Adding only plain water to
your cooling system can be
Amgerous. Plain water, or some
~ .ler liquid like alcohol, can boil
before the proper coolant mix will.
Your vehicle’s coolant warning system is set for the proper coolant
mix. With plain water or the wrong
mix, your engine could get too hot
but you wouldn’t get the overheat
warning. Your engine could catch fire and you
or others could be
burned. Use a
50/50 mix of clean
I
I NOTICE
175 .

Downloaded from www.Manualslib.com manuals search engine 1. You can remove the radiator pressure
cap when the cooling system,
including the radiator pressure cap
and upper radiator hose, is no longer
hot. Turn the pressure cap slowly to
the left until.
it first stops. (Don’t
press down while turning the
pressure cap.)
If you hear a hiss, wait for that to
stop.
A hiss means there is still some
pressure left. You
can be burned
if you
spill coolant on hot engine
parts. Coolant contains ethylene
glycol and it will burn
if the engine
parts are hot enough. Don’t spill
coolant on
a hot engine. I I
2. Then keep turning the pressure cap,
but
now push down as you turn it.
Remove the pressure cap.
11
3. After the lengine cools, open the
coolant
air bleed valve or valves.
2.2L L4 (VIN CODE 4): There is
only one bleed valve. It
is located on
the coolant outlet adapter.

Downloaded from www.Manualslib.com manuals search engine How to Check
The proper fluid should be added if the
level does not reach the bottom of the
diaphragm when it’s
in place in the
reservoir. See the instructions on the
reservoir cap.
Engine Coolant
The following explains your cooling
system and how to add coolant when it
is low. If you have a problem with
engine overheating or
if you need to add
coolant to your radiator, see the
Index
under Engine Overheating.
The proper coolant for you1 ~ ~ ~ _et
will:
Give freezing protection c, .m to
Give boiling protection up to 262°F
Protect against rust and corrosion.
Help keep the proper engine
Let the warning lights work as they
What to Use:
Use a mixture of one-half clean water
(preferably distilled) and one-half
antifreeze that meets
“GM Specification
1825-M,” which won’t damage ,
-34°F (-37°C).
(128°C).
temperature. should. aluminum
parts. You can
also use a
recycled coolant conforming to
GM
Specification 1825-M with a complete
coolant flush and refill. If you use this
mixture, you don’t need to add anything
else.
I
9
Adding only plain water to
your cooling system can be
dangerous. Plain water, or some
other liquid like alcohol, can boil
before the proper coolant mix will.
Your vehicle’s coolant warning
system is set for the proper coolant
mix. With plain water or the wrong
mix, your engine could get too hot
but you wouldn’t get the overheat
warning. Your engine could catch fire and you or others could be
burned. Use a
50/50 mix of clean
water and a proper antifreeze.

Downloaded from www.Manualslib.com manuals search engine A
Using the wrong replacement
wheels, wheel bolts, or wheel
nuts on your vehicle can be
dangerous. It could affect the
braking and handling
of your
vehicle, make your tires lose air and
make you lose control.
You could
have a collision in which you or
others could be injured. Always use
the correct wheel, wheel bolts, and
wheel nuts for replacement.
-
The wrong wheel can also cause
problems with bearing life, brake
cooling, speedometer/odorneter
calibration, headlight aim, bumper
height, vehicle ground clearance,
and tire or tire chain clearance
to
the body and chassis.
Used Replacement Wheels Tire Chains
Putting a used wheel on your
L vehicle is dangerous. You
can’t know how it’s been used or
how many miles it’s been driven. It could fail suddenly and cause an
accident. If you have to replace a
wheel use a
new GM original
L equiDment wheel.
the
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