1994 CHEVROLET ASTRO PASSENGER coolant temperature

Downloaded from www.Manualslib.com manuals search engine These symbols are on some of your controls:
Hood Release
Ventilating
Fan
Windshield Wiper
Q
Rear Window
Wiper
& Washer
w
Windshield
Washer
I I
Rear Window Defogger
w
These symbols are used on warning and indicator lights:
Engine Coolant
Temperature Battery Charging
System
Brake
(Standard Cluster
ANTI-
LOCK
4- Wheel
Anti-Lock
Windshield Defroster
Hatch
Release
II
Fuel Engine Oil
Pressure
ix

Downloaded from www.Manualslib.com manuals search engine NOTICE:
Damage to your engine from neglected oil problems can be
costly and
is not covered by your warranty.
Engine Coolant Temperature Gage
Standard Cluster
If you have the Standard Cluster, you have a gage that shows the engine
coolant temperature.
If the gage pointer moves to the “H” (red) side, your
engine
is too hot!
It means that your engine coolant has overheated. If you have been
operating your vehicle under normal driving conditions, you shou\
ld pull
off
the road, stop your vehicle and turn off the engine as soon as possible.
If you have a digital cluster, a box around the temperature symbol will also
flash when your engine is too hot.
2-63

Downloaded from www.Manualslib.com manuals search engine 8. Then replace the
pressure cap. At
any time during
this procedure
if
coolant begins to
flow out of the
filler neck,
reinstall the
pressure cap. Be
sure the arrows on
the pressure cap
line up like this.
Engine Fan Noise
This vehicle has a clutched engine cooling fan. When the clutch is engaged,
the fan spins faster to provide more
air to cool the engine. In most every day
driving conditions the clutch is not engaged. This improves fuel economy
and reduces fan noise. Under heavy vehicle loading, trailer towing and/or
high outside temperatures, the fan speed increases when the clutch engages.
So you may hear an increase in fan noise. This is normal and should not be
mistaken as the transmission slipping or making extra shifts. It is merely the
cooling system functioning properly. The fan will slow down when
additional cooling is not required and the clutch disengages.
You may also hear this fan noise when you start the engine. It will go away
as the
fan clutch disengages.
If a Tire Goes Flat
It’s unusual for a tire to “blow out” while you’re driving, especially if you
maintain your tires properly.
If air goes out of a tire, it’s much more likely to
leak out slowly. But if you should ever have a “blowout,” here are a
few tips
about what to expect and what to do:
If a front tire fails, the flat tire will create a drag that pulls the vehicle
toward that side. Take your foot off the accelerator pedal and grip the
steering wheel firmly. Steer to maintain lane position, then gently brake to a
stop well out of the traffic lane.
A rear blowout, particularly on a curve, acts much like a skid and may
require the same correction you’d use
in a skid. In any rear blowout, remove
your foot from the accelerator pedal. Get the vehicle under control
by
steering the way you want the vehicle to go. It may be very bumpy and
noisy, but you can still steer. Gently brake to a stop, well off the road if
possible.
If a tire goes flat,
the next section shows how to use your jacking equipment
to change a flat tire safely.
5-18

Downloaded from www.Manualslib.com manuals search engine What to Use
Refer to the Maintenance Schedule to determine what kind of lubricant to
use. See “Recommended Fluids
and Lubricants” in the Index.
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, see “Engine
Overheating” in the Index.
The proper coolant for your vehicle will:
0 Give freezing protection down to -20°F (-29”C), or -34°F (-37°C) in
0 Give boiling protection up to 258°F (125 “C).
0 Protect against rust and corrosion.
0 Help keep the proper engine temperature.
0 Let the warning gages work as they should.
Canada
and for vehicles with the cold climate option.
What to Use
Use a mixture of one-half clean water (preferably distilled) and one-half
antifreeze
that meets “GM Specification 6038-M,” which won’t damage
aluminum parts. You can also use a recycled coolant conforming to
“GM
Specification 603%”’ with a complete coolant flush and refill. If you use
this mixture,
you don’t need to add anything else.
6-26

Downloaded from www.Manualslib.com manuals search engine Radiator Pressure Cap
NOTICE:
Your radiator cap is a 15 psi (105 kPa) pressure-type cap and
must be tightly installed to prevent coolant
loss and possible
engine damage from overheating. Be sure the arrows on the cap \
line up with the overflow tube on the radiator filler neck.
When you replace
your radiator pressure
cap, an
AC@ cap is
recommended. See
“Service Replacement
Part and Filler
Recommendations”
in
the Index.
Thermostat
Engine coolant temperature is controlled by a thermostat in the engine
coolant system. The thermostat stops
the flow of coolant through the
radiator until the coolant reaches a preset temperature.
When you replace your thermostat, an
AC’ thermostat is recommended.
6-29

Downloaded from www.Manualslib.com manuals search engine Explanation Of Scheduled Maintenance Services
Below are explanations of the services listed in the maintenance charts.
The proper fluids and lubricants to use are listed
in this section. Make sure
whoever services your vehicle uses these. All parts should
be replaced and
all necessary repairs done before you or anyone else drives the vehicle.
1.
2.
3.
4.
5.
ENGINE OIL AND OIL FILTER CHANGE“ - ALWAYS USE
API SERVICE
SH OR SG ENERGY CONSERVING I1 OILS OF THE
PROPER VISCOSITY. The
“SH7 or “SG7 designation may be shown
alone or in combination with others, such as “SWCD”, or
“SH, SG,
CD,” or “SG/CD”, etc. To determine the preferred viscosity oil for your
vehicle’s engine see “Engine Oil”
in the Index.
CHASSIS LUBRICATION - Lubricate the front suspension,
steering linkage, transfer case shift linkage, parking brake cab\
le guides,
and brake pedal springs at the intervals specified on the proper
maintenance schedule, or at every engine oil change, whichever \
comes
first.
Ball joints and king pin bushings should not be lubricated unless their
temperature is
10°F (-1 2°C) or higher. When the weather is cold, let
them warm up before lubricating them or they could be damaged.\

Also, be sure to check all the vehicle fluid levels at this \
time.
COOLING SYSTEM SERVICE* - Drain, flush and refill the
system
with new or approved recycled coolant conforming to “GM
Specification 6038-M”. See “Engine Coolant”
in the Index for the
proper coolant and mixture to use
in your vehicle.
Also inspect the hoses and replace them
if they are cracked, swollen, or
deteriorated. Clean the outside of the radiator and air conditioning
condenser. Wash the radiator neck.
To ensure proper operation,
pressure test the radiator and cap.
AIR CLEANER FILTER REPLACEMENT* - Replace at
specified intervals. Ask your dealer for the proper replacement
intervals for your driving conditions.
FRONT WHEEL BEARING REPACK
(2-WHEEL DRIVE ONLY)
- Clean and repack the front wheel
bearings at each brake relining,
or at the specified interval, whichever
comes first.
* An Emission Control Service
7-7

Downloaded from www.Manualslib.com manuals search engine D
Damage Finish
...................................................... 6-61
Sheet Metal
.................................................. 6-60
Daytime Running Lights
..................................... 2-43. 2-60
Indicator Light
.......................................... 2-43. 2-60
Defogger. Rear Window
................... .................... 3-7
DomeLights
.................................................... 2-44
Doors
.......................................................... 2-5
Locks
........................................................ 2-8
PowerLocks
................................................. 2-10
Rear
........................................................ 2-10
Side
......................................................... 2-5
Side. Sliding
.................................................. 2-6
Sliding Tracks
................................................ 642
At Night
.................................................... 4-12
City
........................................................ 4-15
ControlOfAVehicle
........................................... 4-5
Defensive
.................................................... 4-2
Highway Hypnosis
............................................ 4-18
Hydroplaning
................................................ 4-15
InBlizzard
................................................... 4-22
In Mud. Sand. Snow. Or Ice
................................ 4-20. 5-33
InRain
...................................................... 4-13
InWater
..................................................... 4-14
LossofControl
............................................... 4-11
Nightvision
................................................. 4-13
On Hill and Mountain Roads
.................................... 4-18
On Snow or Ice
............................................... 4-20
Passing
..................................................... 4-10
Skidding
.................................................... 4-11
Stuck in Deep Snow
...................................... 4-22. 5-33
Throughwater .......................................... 2-15. 4-14
Uphill
....... .................... ................... 4-19
Winter
...................................................... 4-20
WithaTrailer
................................................ 4-23
DrunkenDriving
................................................. 4-2
Driving
E
Engine
Coolant (Block) Heater
..................................... 2.16. 3.8
Coolant
................................................ 5.14, 6.26
Coolant Temperature Gage
...................................... 2-63
Cover
....................................................... 6-15
Exhaust
................................................ 2.24. 643
FanNoise ................................................... 5-18
Identification
............................................ 6.64. 6.68
Oil (See “Oil”)
Overheating
.................................................. 5-11
RunningWhileParked
......................................... 2-24
Starting
..................................................... 2-14
Equipment. Add-on ............................................. 6-47

Downloaded from www.Manualslib.com manuals search engine Exhaust System ................................................. 6-43
F
FanNoise ...................................................... 5-18
Filter Replacement Chart
.......................................... 6-74
Finish
Care
........................................................ 6-59
Damage
..................................................... 6-61
Automatic Transmission
........................................ 6-20
Brake
....................................................... 6-32
Capacities
................................................... 6-69
CoolantRecovery
............................................. 5-14
FrontAxle
................................................... 6-25
Leak Check
.................................................. 6-36
Powersteering
............................................... 6-30
Radiator
..................................................... 5-15
Rear Axle
................................................... 6-24
RecommendedFluids
.......................................... 7-13
Transfercase
................................................ 6-24
Windshield Washer
............................................ 6-31
FogLamps
..................................................... 2-42
Four-wheel Anti-lock
............................................. 4-7
Frontseats
...................................................... 1-2
Fuel
........................................................... 6-3
FillingYourTank
.............................................. 6-5
Foreign Countries
.............................................. 6-5
Gage
....................................................... 2-61
Gasolines for Cleaner Air
........................................ 6-4
Tankcapacity ................................................ 6-69
Fuses and Circuit Breakers
........................................ 6-72
FuseBlock
.................................................. 6-67
Headlights
................................................... 6-66
Power Windows and Other Power Options
......................... 6-66
Trailer Wiring Harness
......................................... 6-66
Windshield Wipers
....................... .............. 6-66
Fluid
G
Gages ......................................................... 2-61
Coolant Temperature Gage
...................................... 2-63
FuelGage
................................................... 2-61
Odometer
................................................... 2-53
Oil Pressure Gage
............................................. 2-62
Speedometer
................................................. 2-53
Trip Odometer
................................................ 2-53
Voltmeter
.................................................... 2-64
Gasolines for Cleaner Air
.......................................... 6-4
Hatch Release Switch ............................................. 2-28
HalogenBulbs
........................................ ....... 6-36