1993 CHEVROLET ASTRO PASSENGER service indicator

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Malfunction Indicator Lamp (SERVICE ENGINE SOON Light)
Standard Cluster Digital Cluster
PO644
A computer monitors operation of your fuel, ignition and emission controls
system. This light should come on when the ignition is on, bu\
t the engine is not running, as a check to show you it is working.
If it does not come on at
all, have it fixed right away.
If it stays on, or it comes on while you are
driving, the computer is indicating that you have a problem. You should take
your vehicle in for service soon.
* . .,
NOTICE
f you keep driving your vehicle with this light on, after a whi\
le, the
!mission controls won't work well, your fuel economy won't be \
as
g--.
lnd your engine may not run as smoothly. Tis could lead to costly
epairs not covered by your warranty.
I nis light is on the right hand side of your standard cluster. If you have the
digital cluster, it
is on the left hand side.
2-61

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Voltmeter
Standard Cluster Digital Cluster
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PO652
When your engine is not running, but the ignition is on (in \
the Run position),
the gage shows your battery's state
of charge in DC volts. When the ignition
is running, the gage shows the condition of the charging syste\
m. Readings
between the low and high warning zones indicate the normal ope\
rating range.
Readings in either warning zone indicate a possible problem in the electric\
al
system.
On the digital cluster,
a box around the voltmeter symbol will begin to flash
when the charging system needs service.
You can only drive for a
short time with the readings in either warning zone.
If you must drive, turn off all unnecessary accessories.
indicator Lights
Indicator lights go on when you use your turn signals, change \
from low beam
headlights to high beams,
or when you use your hazard flashers. The next
few pages
will also tell you about the indicator lights on your vehicle and
help you locate them.
2-64

Downloaded from www.Manualslib.com manuals search engine Disc Brake Wear Indicators
Your vehicle has front disc brakes and rear drum brakes. Disc brake\
pads
have built-in wear indicators that make a high-pitched warning sound when
the brake pads are worn and new pads are needed. The sound m\
ay come and go or be heard all the time your vehicle is moving (except when you are
pushing on the brake pedal firmly).
I CAUTION
A The brake wear warning sound means that sooner or later your
4 brakes won’t work well. That could lead to an accident. When you
hear the brake wear warning sound, have your vehicle serviced. \
I
NCTICE
Some driving conditions or climates may cause a brake squeal when the
brakes are first applied or lightly applied. This does not mean something is
wrong with your brakes.
Rear Drum Brakes
Your rear drum brakes don’t have the wear indicators, but if you ever hear a
rear brake rubbing noise, have the rear brake linings inspected\
. Also, the rear
brake drums should be removed and inspected each time the tires are
removed for rotation or changing. When
have the rear brakes inspected, too.
Brake linings should always be replaced
Brake Pedal Travel
See your dealer if the brake pedal does
there
is a rapid increase in pedal travel.
trouble.
Brake Adjustment
Every time you make a brake stop, your you have
the front brakes replaced,
as complete axle sets.
not return to normal height, or
if
This could be a sign of brake
disc brakes adjust for wear.
If your
brake pedal goes down farther than normal, your rear drum brak\
es may need
adjustment. Adjust them by backing up and firmly applying the brakes a few
times.
4-1 7

Downloaded from www.Manualslib.com manuals search engine The Maintenance Schedule will tell you how often to lubricate these items.
See “Recommended Fluids and Lubricants” in the Index for the proper
lubricant to use.
Lock Cylinders
To be sure your locks operate properly, they must be lubricated. \
The
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 th\
e 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.
Exhaust System
To help prevent damage to your exhaust system, do not continue to drive
your vehicle
if you notice:
Engine misfiring
Loss of performance
Other unusual operating conditions
Have your engine and exhaust system serviced regularly.
Three- Way Catalytic Converter
Your vehicle’s three-way catalytic converter is designed to reduce the
pollutants in your vehicle’s exhaust. Use only unleaded fuel in your vehicle.
If
you use leaded fuel, you could damage your three-way catalytic \
converter,
and other emission control components.
Malfunction Indicator Lamp (SERVICE ENGINE SOON light)
The Malfunction Indicator Lamp (SERVICE ENGINE SOONlight) on y\
our instrument panel lets you know when your emission system needs \
service.
The light will come on briefly when you start your engine to let you know
that the system is working.
If it does not come on when you start your
engine, or
if it comes on and stays on while you’re driving, your system \
may
need service. Your vehicle should still be driveable, but you should have your
system serviced right away.
6-41

Downloaded from www.Manualslib.com manuals search engine Sewice & Appearance Cam
When lt3 Time for New Tires
K1656
One way to tell when it’s time for new tires is to check the treadwear
indicators, which will appear when your tires have only
2/32 inch (1.6 mm) or
less of tread remaining.
You need a new tire
if:
You can see the indicators at three places around the tire.
You can see cord or fabric showing through the tire’s rubber.
The tread or sidewall is cracked, cut or snagged deep enough to show
The tire has a bump, bulge or split.
cord
or fabric.
The tire has a puncture, cut, or other damage that can’t be repaired
because of the size or location of the damage.
Buying New Tires
To find out what kind and size of tires you need, look at the CertificationRire
label. The tires installed on your vehicle when
it was new had a Tire
Performance Criteria Specification (TPC Spec) number on each t\
ire’s sidewall.
When you get new tires, get ones with that same TPC Spec num\
ber. That
way, your vehicle will continue to have tires that are designed to give proper
endurance, handling, speed rating, traction, ride and other thin\
gs during normal service on your vehicle. If your tires have an all-season tread design,
the
TPC number will be followed by a “MS” (for mud and snow).
6-48

Downloaded from www.Manualslib.com manuals search engine Service & Appearance Care
Light Bulb Data
Trade at
12.8V, Watts No. Quantity
Lamp or Bulb Power Rating
Exterior Lights:
Headlamps 2
6052 65/55
Halogen 65/35
H6054
2
Park, Signal Lamp 2 2057 3212
Tail, Stop Lamps 2
2057
1 94
4
Marker Lamps 3212
12
211-2
3 Dome Lamps (with Roof Console) 12 211-2 2
Dome Lamps (w/o Roof Console)
Interior Lights:
2
194
1 License
Lamp 32
1156
2 Back-up Lamp 2
Candle Power
I Glove Box LamD Ill 194 I 2
I Visor Vanity Mirror Lamps I 4 I 194 I 2
Stepwell Lamp
2
Reading Lamp
(wlo Roof Console) 6 906
4
Reading Lamp (with
Roof Console) 6 21
1-2
3
2 1 94 2
Heater or NC Control
1 161 1 Ashtray Lamp 6 906
Instrument Cluster
Lightst
Generator Indicator Lamp’
2
PC94 6
Instrument Cluster Illum.’ .? PC74
1
Headlamp Beam Indicator Lamp’
2
PC1
94 2 Directional Indicato?
.? PC74
2
Directional Indicator‘
(Service Engine Soon)*
2 PC1 94 1
Malfunction Indicator Lamp
(Service
Engine Soon)’
.7 PC74 1 Malfunction Indicator Lamp
1 PC161 1 Headlamp Beam Indicator Lamp‘ .7
PC74
1
Brake Warning Indicator Lamp’
1
Brake Warning Indicator Lamp2 .7
PC74
1
2 PC1 94
1
Transmission Indicator Dial2
2 PC1 94
6-66

Downloaded from www.Manualslib.com manuals search engine fNDEX
K
Keys ................................................ 2-3
L
Lights ............................................. 2-40
Dome
......................................... 2-44
Fog Lamps
................................ 2-42
Front Parking
............................ 6-36
Indicator
..................................... 2-64
Taillights
..................................... 6-37
Interior Override Switch
............ 2-45
Operation
................................... 2-31
Reading
..................................... 2-44
Turn Signal
................................ 6-36
Loading Your Vehicle
................... 6-42
Lubrication
..................................... 6.39
Accelerator Control System
..... 6-39
Body
........................................... 6-40
Front Suspension and Steering Linkage
................... 6-38
Front Wheel Bearings
(Two-Wheel Drive)
................. 6-38
Latches and Hinge
................... 6-40
Lock Cylinders
.......................... 6-41
Propeller Shaft Slip
SplinesAJniversal Joints
........ 6-40
Rear Axle
.................................. 6-23
Transfer Case
........................... 6-23
Luggage Carrier
............................ 2-49
M
Maintenance .................................... 7-2
Other Items
............................... 6-38
Periodic Inspections
.................. 7-13
Record
....................................... 7-1 6
Scheduled Maintenance
..... 7.3. 7-8
Underbody
................................. 6-58
Mirrors
........................................... 2-45
Inside
......................................... 2-45
Outside
............................ 2.46. 2-47
Vanity
......................................... 2-48
Model Reference
............................... iii
When Towing
a Trailer
............. 4-49
0
Odometer ....................................... 2-56
Trip
............................................. 2-57
Oil
.................................................... 6-9
Additives
.................................... 6-14
Disposal of Used
...................... 6-15
Pressure Gage
.......................... 2-62
To Check
................................... 6-10
What Kind
to Use ..................... 6-12
When
to Change ...................... 6-14
Owner Checks and Services
....... 7-11
P
Off -Road Recovery ....................... 4-20
Parking Brake
.......................................... 2-20
Downhill
..................................... 4-38
On Hills
............................ 4-37, 4-49
Uphill
.......................................... 4-38
Passing Other Vehicles
...... 4-21, 4-48
Pavement Markings
........................ 4-7
Payload Capacity
.......................... 6-43
Periodic Maintenance Inspections7-13
Power Mirrors
........................................ 2-47
Other Options
............................ 6-38
Seat
.............................................. 1-2
Visor Vanity
............................... 2-48
Windows
.................................... 2-26
Fluid
........................................... 6-30
Product Service Publications
......... 8-6
R
Radiator Pressure Cap ................ 6-29
Radio (See “Audio Systems”) Over Things That Burn
............ 2-23
Power Steering
............................. 4-18
Reading Lights
.............................. 2-44
Rear Defogger
................................ 3-8
Rear Hatch/Split-Panel Doors
........ 2-8
Rear WiperNVasher
...................... 2-34
Recommended Fluids/Lubricants
. 7-14
Reporting Safety Defects
............... 8-4
9-4

Downloaded from www.Manualslib.com manuals search engine INDEX
Trip Odometer ............................... 2-57
Turn SignaVMultifunction Lever
... 2-29
Lane Change Indicator
.. .2-30, 2-67
V
Damage Warnings ...................... 0-3
Identification Number
................ 6-60
Storage
...................................... 6-34
Symbols
...................................... -0-4
Ventilation System
.......................... 3-3
Air Vents
...................................... 3-4
Tips
.............................................. 3-3
Voltmeter
....................................... 2-64
W
Warning Lights and Gauges ....... 2-57
Antilock Brake
................. 2-59, 4-16
Devices, Other
............................ 5-3
Washing Your Vehicle
.................. 6-56
Vehicle
Service Engine Soon
...... 2-61, 6-41 Weatherstrips
................................ 6-57
Wheels Alignment and Tire Balance
.......................... 6-50
Aluminum
................................... 6-57
Front Bearings
Nut Torque
................................. 6-64
Replacement
.............................. 6-50
Windows
........................................ 2-26
Rear Defogger
............................. 3-8
Swing-Out
.................................. 2-26
Windshield Washer
....................... 2-33
Fluid
........................................... 6-31
Rear Washer
............................. 2-34
Windshield Wipers
.............. 2-32, 6-39
Blade Chatter
............................ 6-56
Blade Inserts
............................. 6-39
Cleaning Blades
........................ 6-56
Low Speed Delay
..................... 2-32
Rear Window
............................. 2-34
Winter Driving
............................... 4-40
(Two-Wheel Drive)
................. 6-38
9-6