1999 CHEVROLET ASTRO check engine light

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2-68 Service AWD Light (If Equipped)
This light should come on
briefly when you turn on the
ignition, as a check to show
you it is working.
The SERVICE AWD light comes on to indicate that
there may be a problem with the drive system and
service is required. Malfunctions can be indicated by the
system before any problem is apparent, which may
prevent serious damage to the vehicle. This system is
also designed to assist your service technician in
correctly diagnosing a malfunction.
Daytime Running Lamps Indicator Light
You will have this light on
the instrument panel. It goes
on whenever the Daytime
Running Lamps (DRL)
are on.
When it begins to get dark, the DRL indicator light is a
reminder to turn on your headlamps.
Check Gages Light
This light will come on
briefly when you are
starting the engine.
If the light comes on and stays on while you are driving,
check your various gages to see if they are in the
warning zones.

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3-29
NOTICE:
Before you add any sound equipment to your
vehicle
-- like a tape player, CB radio, mobile
telephone or two
-way radio -- be sure you can
add what you want. If you can, it's very
important to do it properly. Added sound
equipment may interfere with the operation of
your vehicle's engine, Delco Electronics radio or
other systems, and even damage them. Your
vehicle's systems may interfere with the
operation of sound equipment that has been
added improperly.
So, before adding sound equipment, check with
your dealer and be sure to check Federal rules
covering mobile radio and telephone units.
Care of Your Cassette Tape Player
A tape player that is not cleaned regularly can cause
reduced sound quality, ruined cassettes or a damaged
mechanism. Cassette tapes should be stored in their
cases away from contaminants, direct sunlight and
extreme heat. If they aren't, they may not operate
properly or may cause failure of the tape player.
Your tape player should be cleaned regularly after every
50 hours of use. Your radio may display CLN to indicate
that you have used your tape player for 50 hours without
resetting the tape clean timer. If this message appears on
the display, your cassette tape player needs to be
cleaned. It will still play tapes, but you should clean it as
soon as possible to prevent damage to your tapes and
player. If you notice a reduction in sound quality, try a
known good cassette to see if it is the tape or the tape
player at fault. If this other cassette has no improvement
in sound quality, clean the tape player.
The recommended cleaning method for your cassette
tape player is the use of a scrubbing action,
non
-abrasive cleaning cassette with pads which scrub
the tape head as the hubs of the cleaner cassette turn.
The recommended cleaning cassette is available through
your dealership (GM Part No. 12344789).

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4-7
Avoid needless heavy braking. Some people drive in
spurts
-- heavy acceleration followed by heavy
braking
-- rather than keeping pace with traffic.
This is a mistake. Your brakes may not have time to
cool between hard stops. Your brakes will wear out
much faster if you do a lot of heavy braking. If you
keep pace with the traffic and allow realistic following
distances, you will eliminate a lot of unnecessary
braking. That means better braking and longer
brake life.
If your engine ever stops while you're driving, brake
normally but don't pump your brakes. If you do, the
pedal may get harder to push down. If your engine
stops, you will still have some power brake assist. But
you will use it when you brake. Once the power assist is
used up, it may take longer to stop and the brake pedal
will be harder to push.
Anti-Lock Brakes (ABS)
Your vehicle has anti-lock brakes (ABS). ABS is an
advanced electronic braking system that will help
prevent a braking skid.
When you start your engine and begin to drive away,
your anti
-lock brake system will check itself. You may
hear a momentary motor or clicking noise while this test
is going on. This is normal.
United States Canada
If there's a problem with the anti
-lock brake system, this
warning light will stay on. See ªAnti
-Lock Brake
System Warning Lightº in the Index.

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4-27
CAUTION:
Snow can trap exhaust gases under your vehicle.
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 a while.
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.
Recreational Vehicle Towing
Your vehicle was not designed to be towed with all four
wheels on the ground. If your vehicle must be towed,
see ªTowing Your Vehicleº in the Index.
NOTICE:
Towing your vehicle with all four wheels on the
ground will damage drivetrain components.

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9-2
Brake
Adjustment 6-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Master Cylinder 6-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking 2-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pedal Travel 6-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing System Parts 6-35 . . . . . . . . . . . . . . . . . . . . . . . .
System Warning Light 2-62 . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission Shift Interlock Check 7-43 . . . . . . . . . . . . . . .
Wear 6-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brakes, Anti-Lock 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking in Emergencies 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Break-In, New Vehicle 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . .
BTSI Check 7-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Canadian Roadside Assistance 8-7 . . . . . . . . . . . . . . . . . . . .
Capacities and Specifications 6-67 . . . . . . . . . . . . . . . . . . . . . .
Carbon Monoxide 2-13, 2-27, 2-28, 2-30, 4-27, 4-34, 4-35
Care of Your Compact Disc Player 3-31 . . . . . . . . . . . . . . . . .
Care of Your Cassette Tape Player 3-29 . . . . . . . . . . . . . . . . . .
Care of Your Compact Discs 3-31 . . . . . . . . . . . . . . . . . . . . . .
Cassette Deck Service 7-41 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cassette Tape Player 3-11, 3-13 . . . . . . . . . . . . . . . . . . . . . . .
Cassette Tape Player Care 3-29 . . . . . . . . . . . . . . . . . . . . . . . .
Center Passenger Position 1-40 . . . . . . . . . . . . . . . . . . . . . . . .
Certification/Tire Label 4-28 . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains, Safety 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains, Tire 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Changing a Flat Tire 5
-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging System Light 2-61 . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Engine Light 2-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Gages Light 2-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Transmission Fluid Cold 6-22 . . . . . . . . . . . . . . . . .
Checking Transmission Fluid Hot 6-21 . . . . . . . . . . . . . . . . . .
Checking Your Restraint Systems 1-62 . . . . . . . . . . . . . . . . . .
Chemical Paint Spotting 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . .
Child Restraints 1-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing in a Rear Outside Seat Position 1-52 . . . . . . . . . . .
Securing in the Center Seat Position 1-54 . . . . . . . . . . . . . .
Securing in the Right Front Seat Position 1-56 . . . . . . . . . .
Top Strap 1-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Where to Put 1-50, 1-51 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter 2-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Breakers and Fuses 6-61 . . . . . . . . . . . . . . . . . . . . . . .
Cleaner, Air Filter 6-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning
Aluminum Wheels 6
-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fabric 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glass 6-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside of Your Vehicle 6-52 . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel 6-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leather 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside of Your Vehicle 6-55 . . . . . . . . . . . . . . . . . . . . . . . .
Special Problems 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stains 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tires 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vinyl 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheels 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield and Wiper Blades 6-54 . . . . . . . . . . . . . . . . . . .

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9-6
Key Lock Cylinders Service 7-42 . . . . . . . . . . . . . . . . . . . . .
Keyless Entry System 2-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keys 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Labels
Certification/Tire 4-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Parts Identification 6-59 . . . . . . . . . . . . . . . . . . . . .
Tire-Loading Information 4-28 . . . . . . . . . . . . . . . . . . . . . .
Vehicle Identification Number 6-59 . . . . . . . . . . . . . . . . . . .
Lamps
Dome 2
-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior 2-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Latches, Seatback 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle 2-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle with the Engine Running 2-25 . . . . . . .
Lighter 2-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lights
Air Bag Readiness 1
-28, 2-60 . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock Brake System Warning 2-63, 4-7 . . . . . . . . . . . .
Brake System Warning 2-62 . . . . . . . . . . . . . . . . . . . . . . . . .
Charging System 2-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Engine 2-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Gages 2-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daytime Running Lamps Indicator 2-68 . . . . . . . . . . . . . . .
Safety Belt Reminder 1-13, 2-60 . . . . . . . . . . . . . . . . . . . . .
Security 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service AWD 2-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Engine Soon 2-64 . . . . . . . . . . . . . . . . . . . . . . . . . . Loading Your Vehicle 4
-28 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locks
Cylinders 7
-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transmission Lock Check 7-44 . . . . . . . . . . . . . . .
Key Lock Cylinder Service 7-42 . . . . . . . . . . . . . . . . . . . . .
Power Door 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sliding Door Child Security 2-11 . . . . . . . . . . . . . . . . . . . . .
Lubricants and Fluids 7-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication Service, Body 7-42 . . . . . . . . . . . . . . . . . . . . . . . .
Luggage Carrier 2-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lumbar Controls 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance, Normal Replacement Parts 6-69 . . . . . . . . . . .
Maintenance Record 7-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Schedule 7-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long Trip/Highway 7-29 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long Trip/Highway Definition 7-6 . . . . . . . . . . . . . . . . . . .
Long Trip/Highway Intervals 7-6 . . . . . . . . . . . . . . . . . . . . .
Owner Checks and Services 7-41 . . . . . . . . . . . . . . . . . . . . .
Periodic Maintenance Inspections 7-45 . . . . . . . . . . . . . . . .
Recommended Fluids and Lubricants 7-47 . . . . . . . . . . . . .
Scheduled Maintenance Services 7-4 . . . . . . . . . . . . . . . . . .
Short Trip/City 7-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short Trip/City Definition 7-5 . . . . . . . . . . . . . . . . . . . . . . .
Short Trip/City Intervals 7-5 . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance, Underbody 6-57 . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Trailer Towing 4-38 . . . . . . . . . . . . . . . . .
Malfunction Indicator Lamp 2-64 . . . . . . . . . . . . . . . . . . . . . .
Manual Front Seat 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .