1994 CHEVROLET ASTRO PASSENGER air condition

Downloaded from www.Manualslib.com manuals search engine Temperature - A, By C
The temperature grades are A (the highest), B, and C, representing the tire’s
resistance to the generation of heat and its ability to dissipate heat when
tested under controlled conditions on a specified indoor laborat\
ory test
wheel. Sustained high temperature can cause the material of the tire to
degenerate and reduce tire life, and excessive temperature can lead to
sudden tire failure. The grade
C corresponds to a level of performance
which all passenger car tires must meet under the Federal Motor Vehicle
Safety Standard
No. 109. Grades B and A represent higher levels of
performance
on the laboratory test wheel than the minimum required by
law.
Warning: The temperature grade
for this tire is established for a tire that is
properly inflated and
not overloaded. Excessive speed, underinflation, or
excessive loading, either separately or in combination, can cause heat
buildup and possible tire failure.
These grades are molded on the sidewalls
of passenger car tires.
While the tires available as standard or optional equipment on General
Motors vehicles may vary with respect to these grades, all suc\
h tires meet General Motors performance standards and have been approved for use
on
General Motors vehicles. All passenger type (P Metric) tires must conform
to Federal safety requirements
in addition to these grades.
Wheel Alignment and Tire Balance
The wheels on your vehicle were aligned and balanced carefully at \
the
factory to give you the longest tire life and best overall performance.
In most cases, you will not need to have your wheels aligned again.
However, if you notice unusual tire wear or your vehicle pulling
one way or
the other, the alignment may need
to be reset. If you notice your vehicle
vibrating when driving on a smooth road, your wheels may need \
to be
rebalanced.
Wheel Replacement
Replace any wheel that is bent, cracked or badly rusted. If wheel nuts keep
coming loose, the wheel, wheel bolts, and wheel
nuts should be replaced. If
the wheel leaks air, replace it (except some aluminum wheels, \
which can
sometimes be repaired). See your
GM dealer if any of these conditions exist.
Your dealer will know the kind of wheel
you need.

Downloaded from www.Manualslib.com manuals search engine Finish Damage
Any stone chips, fractures or deep scratches in the finish should be repaired
right away. Bare metal will corrode quickly and
may develop into a major
repair expense.
Minor chips and scratches can be repaired with touch-up materials available
from your dealer or other service outlets. Larger areas
of finish damage can
be corrected in your dealer’s body and paint shop.
Underbody Maintenance
Chemicals used for ice and snow removal and dust control can collect on
the underbody. If these are not removed, accelerated
corrosion (rust) can
occur on the underbody parts such as fuel lines, frame, floor pan, and
exhaust system even though they have corrosion protection.
At least every spring, flush these materials from the underbody with plain
water. Clean any areas where mud and other debris can collect. Dirt packed
in closed areas of the frame should be loosened before being flushed. Your
dealer or
an underbody vehicle washing system can do this for you.
Fiberglass Springs
I NOTICE:
Don’t use corrosive or acidic cleaning agents, engine degreas\
ers,
aluminum cleaning agents
or other harsh solvents to clean
fiberglass springs; they’ll damage the springs.
Chemical Paint Spotting
Some weather and atmospheric conditions can create a chemical fallout.
Airborne pollutants can fall upon and attack painted surfaces on your
vehicle. This damage can take two forms: blotchy, ringlet-shaped
discolorations, and small irregular dark spots etched into the paint surface.
Although no defect in the paint job causes this,
GM will repair, at no charge
to the owner, the surfaces
of new vehicles damaged by this fallout condition
within
12 months or 12,000 miles (20 000 km) of purchase, whichever
comes first.
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Downloaded from www.Manualslib.com manuals search engine NAME
INST LPS
CIRCUITS
PROTECTED
Instrument Panel Lamps,
Radio Dial Lamps, Heater
Lamps
PWR ACCY Power Door Locks, Power
CIG LTWDM Digital Clock, Cigarette Seat
Lighter,
Dome Lights,
Radio Memory, Glove Box
Lamp
GAGES
AUX
HTR-A/C STOP-HAZ Instrument Cluster Gages,
Brake
Switch, Audio
Alarm, Headlight Switch
Illumination, Ash Tray
Illumination, Cruise
Control
Auxiliary Heater-Rear A/C (if equipped)
Stop Lamps, Hazard Flash,
Digital Instrument Cluster
HORN/TL Headlamp Switch, Tail and
LMPS Parking Lamps, Horn
Relay
TURN-B/U Direction Signal Flash,
Back Up Lamps
HTR A/C
RADIO
ECM B
ECM I
PWR WDO
AIR BAG
WIPER
BRAKE
FOG
LAMPS*** Front Heater
& Air
Conditioning
Radio
Engine Control Module
Engine Control Module
Power Windows
Air Bag
Windshield Wiper
Anti-Lock Brake System, Speedometer
Fog Lamps
FUSE
10 Amp
CIRCUIT
BREAKER
30 Amp
20 Amp
20 Amp
25 Amp
20 Amp
20 Amp
20 Amp
20 Amp
10 Amp
15 Amp
10 Amp
30 Amp
10 Amp
25 Amp
15 Amp
15 Amp
6-73

Downloaded from www.Manualslib.com manuals search engine Air Conditioning Refrigerants
Not all air conditioning refrigerants are the same. If the air conditioning
system in your vehicle needs refrigerant, be sure the proper refrigerant is
used. If you’re not sure, ask your
GM dealer. For additional information, see
your “Warranty and Owner Assistance Information” booklet.
Air Conditioning Refrigerant Capacity
TYPE
R-l34a
R-
1 34a
SYSTEM
C-60**
C-69***
*All Quantities Are Approximate
**Front A/C Only
***Front
& Rear A/C
QUANTITY*
2.00 lbs. (.91 kg)
3.00 lbs. (1.36 kg)
~~ ~.
NOTICE:
R-134a refrigerant is not compatible with R-12 refrigerant in
an air conditioning system. R-12 in an R-134a system
will cause
compressor failure, refrigerant oil sludge, or poor air conditioning system performance.
6-75

Downloaded from www.Manualslib.com manuals search engine A Word About Maintenance
We at General Motors want to help you keep your vehicle in good working
condition. But we don’t know exactly how you’ll drive
it. You may drive
very short distances only a few times a week. Or you may drive long distances
all the time in very hot, dusty weather. You may use your vehicle in making
deliveries. Or
you may drive it to work, to do errands, or in many other ways.
Because of all the different ways people use their
GM vehicles, maintenance
needs vary.
You may even need more frequent checks and replacements than
you will find
in the schedules in this section. So please read this section and
note how
you drive. If you have any questions on how to keep your vehicle
in good condition, see your GM dealer, the place many GM owners choose
to have their maintenance work done. Your dealer can be relied upon to
use
proper parts and practices.
Your Vehicle A d The Environment
Proper vehicle mainte nce not only helps keep your vehicle in good
working condition, bur
11 also helps the environment. All recommended
maintenance procedures are important. Improper vehicle maintenance or the
removal of important components can significantly affect the quality
of the
air we breathe. Improper fluid levels or even the wrong tire inflation can
increase
the level of emissions from your vehicle. To help protect our
environment, and to help keep your vehicle
in good condition, please
maintain your vehicle properly.
If you are skilled enough to do some work on your vehicle,
you will
probably want to get the service information GM publishes. You will find a
list
of publications and how to get them in Section 8, Customer Assistance
Information.
See “Service Publications” in the Index.
The Maintenance Record provides a place for you to record the maintenance
performed on your vehicle. Whenever
any maintenance is performed, be
sure to write it down in this section. This will help you determine when your
next maintenance should be done. In addition,
it is a good idea to keep your
maintenance receipts. They may be needed
to qualify your vehicle for
warranty repairs.
7-2

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 6. TRANSMISSION SERVICE: - Change the transmission fluid and
filter every
15,000 miles (25 000 km) if the vehicle is mainly driven
under
one or more of these conditions:
In heavy city traffic.
Where the outside temperature regularly reaches 90 “F (32” C) or
In hilly or mountainous terrain.
higher.
Frequent trailer pulling.
0 Uses
such as taxi, police, delivery or other commercial service.
If the vehicle
is not used mainly under any of these conditions, change
the fluid and filter every
30,000 miles (50 000 km). See “Automatic
Transmission Fluid” in the Index for more information.
7. FUEL FILTER REPLACEMENT*$ - Replace the fuel filter at the
specified interval or sooner if clogged.
8. SPARK PLUG REPLACEMENT* - Replace spark plugs with the
type listed in Section
6. See “Specification Charts” in the Index.
9. SPARK PLUG WIRE INSPECTION* - Clean wires and inspect
for bums, cracks or other damage. Check the wire boot fit at the
distributor and at the spark plugs. Replace wires as needed.
Adjust timing to underhood label specifications. Inspect the inside and
outside
of the distributor cap and rotor for cracks, carbon tracking and
corrosion. Clean or replace as needed.
10. ENGINE TIMING CHECK AND DISTRIBUTOR CHECK*$ -
11. FUEL TANK, CAP AND LINES INSPECTION*$ - Inspect the
fuel tank, cap and lines for damage or leaks. Remove fuel cap, inspect
gasket for an even filler neck imprint, and any damage. Replace parts
as needed.
12. ENGINE ACCESSORY DRIVE BELT INSPECTION* - Inspect
belt.
Look for cracks, fraying, wear, and proper tension. Adjust or
replace as needed.
* An Emission Control Service
$ The California Air Resources Board has determined that the failure to perform \
this
maintenance item will not nullify the emission warranty or limit recall liability prior to the
completion of vehicle useful life. General Motors, however, urges that all re\
commended
maintenance services be performed at the indicated intervals and\
the maintenance be
recorded.
7-8

Downloaded from www.Manualslib.com manuals search engine 13. TIRE AND WHEEL ROTATION AND INSPECTION - For
proper wear and maximum tire life, rotate tires at the first
6,000 miles
(10
000 kilometers) for Schedule I or 7,500 miles (12 500 kilometers)
for Schedule I1 and
then every 15,000 miles (25 000 kilometers)
thereafter. Follow the instructions and patterns shown in Sectio\
n
6.
Check tires for uneven wear or damage. If irregular or premature wear
is apparent, check wheel alignment. Also, check for damaged wheels.
See “Tires” in the Index for more information.
14.
DRIVE AXLE SERVICE - Check readfront axle fluid level and add
as needed. Check constant velocity joints and axle seals for leaking.
Locking Differential - Drain fluid at first oil change and refill.
Check fluid level and add as needed at subsequent oil changes. In
dusty areas or trailer towing applications, drain fluid at every
15,000 miles (24 135 kilometers) and refill.?
Standard Differential - Check fluid level and add as needed at
every oil change. In dusty areas or trailer towing applications\
,
drain fluid every
15,000 miles (24 135 kilometers) and refill.?
15. BRAKE SYSTEM INSPECTION - When the engine oil is changed,
inspect the lines and hoses for proper hookup, binding, leaks, cracks,
chafing, etc. Check the parking brake adjustment, and the fluid\
level in the master cylinder. A low fluid level can indicate
worn disc brake pads
which may need to be serviced.?
When the wheels are removed for rotation, inspect disc brake pads for
wear and rotors for surface condition. Also inspect drum brake linings
for wear and cracks. Inspect other brake parts, including drums, wh\
eel
cylinders, parking brake, etc. at the same time.
Inspect brakes more often if driving habits or conditions resul\
t in
frequent braking.
-f A fluid loss in these systems may indicate a problem. Have them inspected a\
nd
repaired at once.
7-9