1999 CHEVROLET ASTRO PASSENGER brake light

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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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4-17
Driving too fast through large water puddles or even
going through some car washes can cause problems, too.
The water may affect your brakes. Try to avoid puddles.
But if you can't, try to slow down before you hit them.
CAUTION:
Wet brakes can cause accidents. They won't work
as well in a quick stop and may cause pulling to
one side. You could lose control of the vehicle.
After driving through a large puddle of water or
a car wash, apply your brake pedal lightly until
your brakes work normally.

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5-4
2. Get the vehicles close enough so the jumper cables
can reach, but be sure the vehicles aren't touching
each other. If they are, it could cause a ground
connection you don't want. You wouldn't be able to
start your vehicle, and the bad grounding could
damage the electrical systems.
3. To avoid the possibility of the vehicles rolling, set
the parking brake firmly on both vehicles involved in
the jump start procedure. Put an automatic
transmission in PARK (P).
4. Turn off the ignition on both vehicles. Unplug
unnecessary accessories plugged into the cigarette
lighter or accessory power outlets. Turn off all lamps
that aren't needed as well as radios. This will avoid
sparks and help save both batteries. In addition, it
could save your radio!
NOTICE:
If you leave your radio on, it could be badly
damaged. The repairs wouldn't be covered by
your warranty.
5. Open the hoods and locate the batteries. Find
the positive (+) and negative (
-) terminals on
each battery.
CAUTION:
Using a match near a battery can cause battery
gas to explode. People have been hurt doing this,
and some have been blinded. Use a flashlight if
you need more light.
Be sure the battery has enough water. You
don't need to add water to the ACDelco
Freedom

battery installed in every new GM
vehicle. But if a battery has filler caps, be sure
the right amount of fluid is there. If it is low, add
water to take care of that first. If you don't,
explosive gas could be present.
Battery fluid contains acid that can burn you.
Don't get it on you. If you accidentally get it in
your eyes or on your skin, flush the place with
water and get medical help immediately.

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6-34
NOTICE:

Using the wrong fluid can badly damage
brake system parts. For example, just a few
drops of mineral
-based oil, such as engine
oil, in your brake system can damage brake
system parts so badly that they'll have to be
replaced. Don't let someone put in the
wrong kind of fluid.

If you spill brake fluid on your vehicle's
painted surfaces, the paint finish can be
damaged. Be careful not to spill brake fluid
on your vehicle. If you do, wash it off
immediately. See ªAppearance Careº in
the Index.
Brake Wear
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 may come and go or
be heard all the time your vehicle is moving (except when
you are pushing on the brake pedal firmly).
CAUTION:
The brake wear warning sound means that soon
your brakes won't work well. That could lead to
an accident. When you hear the brake wear
warning sound, have your vehicle serviced.
NOTICE:
Continuing to drive with worn-out brake pads
could result in costly brake repair.
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.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated, inspect
brake pads for wear and evenly torque wheel nuts in the
proper sequence to GM specifications.

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6-63
Fuse/Circuit
BreakerUsage
12 L, M1, M2 Blower Motor, Rear
A/C Relay Coil, Front Cont.
Temp. Door Motor, HI Blower
Relay, Defogger Timer Coil
13 Cigarette Lighter, Door Lock
Switches, Dutch Door
Release Module
14 Cluster Illum, HVAC Controls,
Chime Module, Radio
Illumination, Rear Heat Switch
Illumination, Rear Wiper/Washer
Switch Illumination, Rear Liftgate
Switch Illumination, Remote
Cassette Illumination,
O/H Console
15 DRL Lamps
16 Front Turn Signals, Rear Turn
Signals, Trailer Turn Signals,
Back
-up Lamps, BTSI Solenoid
17 Radio: ATC (Standby),
2000 Series (Main Feed),
Rear Seat Audio ControlsFuse/Circuit
BreakerUsage
18 VCM
-Ign 3, VCM-Brake, 4WAL,
Cruise Stepper Motor Signal
19 Radio: ATC (Main Feed),
2000 Series (Standby)
20 PRNDL/ Odometer, TCC Enable
and PWM Solenoid, Shift A
and Shift B Solenoids,
3
-2 Downshift Solenoid
21 Security
22 Not Used
23 Rear Wiper, Rear Washer Pump
24 Not Used
A (Circuit Breaker) Power Door
Lock Relay, 6
-way Power Seat,
Remote Control Door Lock
Receiver, Dutch Door Module,
Dutch Door Release
B (Circuit Breaker) Power Windows

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6-65
Fuse/Circuit
Breaker Usage
UPFITTER
-BATT Upfitter Battery Power Stud,
Trailer Wiring Harness
UPFITTER
-ACCY Upfitter Accessory Relay
Spare Not used
Fuse Puller*
Spare Not used
Spare Not used
ECM
-1B Fuel Pump Relay and Motor,
VCM, Oil Pressure
Switch/Sender
HORN Horn Relay and Horn
A/C COMP A/C Enable Relay and
Compressor
ATC Active Transfer Case
-L Van
ENG
-I Oxygen Sensors, Camshaft
Position Sensor, Mass Air Flow
Sensor, Evaporative Emission
Canister Purge Solenoid, Linear
EGR Valve Solenoid, VCM
EGR HI
IGN
-E A/C Enable Relay CoilFuse/Circuit
Breaker Usage
ECM
-I Fuel Injectors 1-6, Crankshaft
Position Sensor, VCM, Coil
Driver Module (EST)
LIGHTING Park Lamps Fuse, DRL Fuse,
Headlamp and Panel Dimmer
Switch
BATT Steering/Security Fuse, Courtesy
Fuse, ACSY CB, Stop/Hazard
Fuse, Auxiliary Power Fuse,
Cigarette Lighter Fuse, Radio
Battery Fuse
IGN A Starter Relay, Ignition Switch
IGN B Ignition Switch
ABS Electronic Brake Control
Module
A/C Blower Motor Resistor, Blower
Relay
RR HTR/AC Auxiliary Heater, A/C Relay
HTD MIR/RR
DEFOGRear Window Defogger
*A fuse puller is included in the underhood electrical
center. You will also find spare fuses.

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9-1
Section 9 Index
A
ccessory Power Outlet 2-51 . . . . . . . . . . . . . . . . . . . . . . . . .
Add-On Equipment 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag 1-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Equipment 1-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How Does it Restrain 1-31 . . . . . . . . . . . . . . . . . . . . . . . . . .
How it Works 1-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 1-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Readiness Light 1-28, 2-60 . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing 1-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What Makes it Inflate 1-31 . . . . . . . . . . . . . . . . . . . . . . . . . .
What Will You See After it Inflates 1-31 . . . . . . . . . . . . . . .
When Should it Inflate 1-30 . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner Filter 6-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning 3-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning Refrigerants 6-68 . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance, Tire 6-49 . . . . . . . . . . . . . . . . . . . . . .
All-Wheel Drive 2-29, 6-24 . . . . . . . . . . . . . . . . . . . . . . . . . .
Aluminum Wheels, Cleaning 6-56 . . . . . . . . . . . . . . . . . . . . . .
Antenna, Fixed Mast 3-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Antifreeze 6-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock
Brake System Warning Light 2-63, 4-7 . . . . . . . . . . . . . . . .
Brakes 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Theft, Radio 3-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appearance Care 6
-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care Materials 6-58 . . . . . . . . . . . . . . . . . . . . . . .
Arbitration Program 8-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ashtrays 2-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Equipment, Adding 3-29 . . . . . . . . . . . . . . . . . . . . . . . .
Audio Systems 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic
Transmission Check 7
-42 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission Operation 2-20 . . . . . . . . . . . . . . . . . . . . . . . .
Transmission Fluid 6-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AWD, Service Light 2-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle
Front 6
-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locking Rear 2-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear 6-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery 6-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement, Remote Keyless Entry 2-9 . . . . . . . . . . . . . . .
Warnings 5-3, 5-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BBB Auto Line 8-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Better Business Bureau Mediation 8-3 . . . . . . . . . . . . . . . . . . .
Blizzard 4-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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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 . . . . . . . . . . . . . . . . . . .