heater CHEVROLET ASTRO 1997 2.G User Guide

Downloaded from www.Manualslib.com manuals search engine This can cause deadly CO (carbon monoxide) gas
to get inside.
CO could overcome you and kill
you.
You can't see it or smell it, so you might not
know
it is in your vehicle. Clear away snow from
around the base
of your vehicle, especially any
that
is blocking your exhaust pipe. And check
around again from time
to time to be sure snow
doesn't collect there.
Open
a window just a little on the side.of the
vehicle that's
away from the wind. This will help
keep
CO out.
Run your engine only as long as you must. This saves
fuel. When you run the engine, make it go a little faster
than just idle. That is, push the accelerator slightly. This
uses less fuel for the heat that you get and it keeps the
battery charged. You will need a well-charged battery to
restart the vehicle,
and possibly for signaling later on
with your headlamps. Let the heater run for awhile.
Then, shut the engine
off and close the window almost
all the way to preserve the heat. Start the engine again
and repeat this only
when you feel really uncomfortable
from the cold. But do it as little as possible. Preserve the
fuel as long as you can.
To help keep warm, you can get
out
of the vehicle and do some fairly vigorous exercises
every half hour or
so until help comes.
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Downloaded from www.Manualslib.com manuals search engine If No Steam Is Coming From Your Engine
If you get the overheat warning but see or hear no
steam, the problem may not be too serious. Sometimes
the engine
can get a little too hot when you:
0 Climb a long hill on a hot day.
0 Stop after high-speed driving.
0 Idle for long periods in traffic.
Tow a trailer, See “Driving on Grades” in the Index.
If you get the overheat warning with no sign of steam,
try this for
a minute or so:
1. Turn off your air conditioner.
2. Turn on your heater to full hot at the highest fan
speed and open the window as necessary.
3. If you’re in a traffic jam, shift to NEUTRAL (N);
otherwise, shift to the highest gear while
driving
-- DRIVE (D). If you no longer have the overheat warning, you can drive.
Just to
be safe, drive slower for about 10 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, push the accelerator until
the engine speed is about twice as fast as normal idle
speed. Bring the engine speed back to normal idle speed
after two or three minutes. Now see if the warning stops.
But then, if you still have the warning,
turn ofthe
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.
5-14

Downloaded from www.Manualslib.com manuals search engine 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. Engine Fan
If the coolant inside the coolant recovery tank is boiling,
don’t do anything else
until it cools down.
The coolant level should be at the ADD 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.
5-15

Downloaded from www.Manualslib.com manuals search engine A CAUTION:
-----
Heater and radiator hoses, 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.
I NOTICE:
Engine damage from running your engine
without coolant isn’t covered by your warranty.
If there seems to be no leak, start the engine again. See
if the fan speed increases when idle speed is doubled by
pushing the accelerator pedal down.
If it doesn’t, your
vehicle needs service. Turn off the engine.
How to Add Coolant to the Coolant
Recovery Tank
If you haven’t found a problem yet, but the coolant level
isn’t at the
ADD mark, add a 50/50 mixture of clean water
(prefembly distilled) and DEX-COOL@ (silicate-free)
antifreeze at the coolant recovery tank. (See “Engine
Coolant”
in the Index for more information.)
,/!
CAU [ON:
---
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 DEX-COOL@ coolant.
5-16

Downloaded from www.Manualslib.com manuals search engine NOTICE:
In cold weather, water can freeze and crack the
engine, radiator, heater core and other parts. Use the recommended coolant and the proper
coolant mix. 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.
When the coolant
in the coolant recovery tank is at the
ADD mark, start your vehicle.
If the overheat warning continues, there’s one more
thing
you can try. You can add the proper coolant mix
directly
to the radiator, but be sure the cooling system is
cool before
you do it.
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Downloaded from www.Manualslib.com manuals search engine 6. Grasp the top of the heater duct and pull down gently
to remove
it.
7. Remove the two bolts at the engine cover. The bolts
are
not supposed to come out of the cover, only from
the front of the dash.
When removing the cover, be careful
not to damage
the instrument panel or the trim.
6-17

Downloaded from www.Manualslib.com manuals search engine 8. Grasp the bottom of the cover and slide it rearward.
Then, lift it up and out
of the vehicle.
Installing the Engine Cover
1. Lift the engine cover into the vehicle and slide it all
the way forward. Make sure the rubber seal
is over
the latches.
2. Install the two bolts at the engine cover.
3. Put the heater duct over the engine cover studs. Push
up
on the duct gently until it snaps into place.
4. Reconnect the electrical connectors.
5. Install the engine cover extension by gently
squeezing the sides and sliding it into place.
Make sure all of the fastener clips engage and the
extension fits properly in place. Replace and tighten
the two screws.
6. Install the two nuts to secure the extension in place.
6-18

Downloaded from www.Manualslib.com manuals search engine I
NOTICE:
When adding coolant, it is important that you use
only
DEX-COOL’ (silicate-free) coolant.
If coolant other than DEX-COOL’ is added to
the system, premature engine, heater core or radiator corrosion may result. In addition, the
engine coolant will require change sooner
-- at
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the
use
of coolant other than DEX-COOL@ is not
covered by your new vehicle warranty.
What to Use
Use a mixture of one-half clean wuter (preferably
distilled) and one-half
DEX-COOL@ coolant which
won’t damage aluminum parts.
If you use this mixture,
you don’t need to add anything else.
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 DEX-COOL@ antifreeze.
6-26

Downloaded from www.Manualslib.com manuals search engine NOTICE:
If you use an improper coolant mix, your engine
could overheat and be badly damaged. The repair cost wouldn’t be covered by your
warranty. Too much water in the mix can freeze
and crack the engine, radiator, heater core and
other parts.
If you have to add coolant more than four times a year,
have your dealer check your cooling system.
I NOTICE:
If you use the proper coolant, you don’t have to
add extra inhibitors or additives which claim to
improve the system. These can be harmful.
Checking Coolant
When your engine is cold, the coolant level should be at
ADD, or a little higher. When your engine is warm, the
level should be up
to FULL HOT, or a little higher.
6-27

Downloaded from www.Manualslib.com manuals search engine FuseKircuit Breaker
UPFIT-BATT .......
UPFIT-IGN ........
Spare .............
Fuse Puller*
Spare
.............
Spare .............
ECM-B ............
HORN ............
A/C COMP .........
RR DEFOG ........
ENG-I ............
Usage
Upfitter Battery Power Stud,
Trailer Wiring Harness
Upfitter Ignition Relay
Not used
Not used
Not used
Fuel Pump Relay, VCM,
Oil Pressure Switch/Sender
Horn Relay
A/C Enable Relay
Heater-A/C Control Selector
Switch
Oxygen Sensors
1-4,
Camshaft Position Sensor,
Mass Air Flow Sensor,
Evaporative Emission
Canister Purge Solenoid
Valve, Linear EGR Valve
Solenoid,
VCM
FuseKircuit Breaker
IGN-E ............
ECM-I ......... ~.
LIGHTING ........
BATT .............
IGNA .............
IGN B .............
ABS ..............
A/C ...............
RR HTR/AC ........
Spare .............
Usage
A/C Enable Relay
Fuel Injectors 1-6,
Crankshaft Position Sensor,
VCM, Distributor Ignition
Control Module
Park Lamps Fuse, DRL Fuse,
Headlamp and Panel
Dimmer Switch
I/P Fuse Block Fuses, Power
Seat CB, Stop/Hazard Fuse,
Auxiliary Power Fuse,
Cigarette Lighter Fuse,
Radio, Battery Fuse
Starter Relay, Ignition Switch
Ignition Switch Brake Pressure Module Valve
Blower Motor Resistor,
Blower Relay Auxiliary Heater
A/C Relay
Not used
*A fuse puller is included in the underhood electrical
center.
You will also find spare fuses.
6-65