2003 CHEVROLET ASTRO headlamp

Section 5 Service and Appearance Care
Service .......................................................... -5-3
Doing Your Own Service Work
......................... 5-3
Adding Equipment to the Outside of
Your Vehicle
.............................................. 5-4
Fuel ................................................................ 5.5
Gasoline Octane ........................................... -5-5
Gasoline Specifications .................................... 5.5
California Fuel ............................................. -56
Additives
....................................................... 5.6
Fuels in Foreign Countries
............................... 5.7
Filling Your Tank
............................................ 5-8
Filling a Portable Fuel Container
..................... 5-10
Checking Things Under the Hood .................... 5-1 1
Hood Release .............................................. 5.11
Engine Compartment Overview
...................... 5.14
Engine Oil
................................................... 5.15
Engine Cover ................. .... ........ 5.20
Engine Air Cleaner/Filter
................. ........ 5.24
Automatic Transmission Fluid
...................... 5.25
Engine Coolant ............................................. 5.28
Radiator Pressure Cap
.................................. 5.30
Engine Overheating
....................................... 5.31
Cooling System
............................................ 5.33
Engine Fan Noise
......................................... 5.39
Power Steering Fluid
..................................... 5.40
Windshield Washer Fluid
................................ 5.41 Brakes
........................................................ 5.42
Battery
........................................................ 5-46
Jump Starting
............................................... 5-47
All-Wheel Drive .............................................. 5-52
Rear Axle ....................................................... 5-53
Front Axle ...................................................... 5-54
Bulb Replacement .......................................... 5-55
Halogen Bulbs .............................. ..... 5-55
Headlamps .................................. ..... 5-55
Front Turn Signal Lamps ............................... 5-59
Replacement Bulbs
....................................... 5-61
Windshield Wiper Blade Replacement .............. 5-62
Tires .............................................................. 5.63
Inflation
- Tire Pressure ................................ 5-64
Tire Inspection and Rotation
........................... 5-64
When It
Is Time for New Tires ....................... 5-66
Buying New Tires
......................................... 5-66
Uniform Tire Quality Grading
.......................... 5-67
Wheel Alignment and Tire Balance
.................. 5-69
Wheel Replacement
...................................... 5-69
Tire Chains
.................................................. 5-70
If a Tire Goes Flat ........................................ 5.70
Changing a Flat Tire ..................................... 5.71
Compact Spare Tire ...................................... 5-82
Taillamps
.................................................... 5-60
5- 1

Section 5 Service and Appearance Care
Appearance Care ............................................ 5.83
Care
of Safety Belts ...................................... 5-86
Weatherstrips
............................................... 5-86
Sheet Metal Damage
..................................... 5-88
Finish Damage
............................................. 5-88
Underbody Maintenance
................................ 5-89
Chemical Paint Spotting
................................. 5-89
GM Vehicle Care/Appearance Materials ........... 5-89
Vehicle Identification ...................................... 5-91
Vehicle Identification Number (VIN)
................. 5-91
Service Parts Identification Label
..................... 5-91
Cleaning the Inside of Your Vehicle ................. 5-83
Cleaning the Outside
of Your Vehicle ................. 5-86
Electrical System ............................................ 5.92
Add-on Electrical Equipment
......................... 5-92
Headlamp Wiring
.......................................... 5-92
Windshield Wiper Fuses
................................ 5-92
Power Windows and Other Power Options
....... 5-92
Fuses and Circuit Breakers
............................ 5-93
Capacities and Specifications ......................... 3-99
Capacities and Specifications
......................... 5-99
Normal Maintenance Replacement Parts ......... 5-101
5-2

Bulb Replacement
For any bulb changing procedure not listed in this
section, contact your dealer.
For the type of bulbs, see Replacement Bulbs OIJ
page 5-6 1.
Halogen Bulbs Headlamps
Sealed
Beam Headlamp
Haloc_ I bulbs have pressurized gas inside and
can burst
if you drop or scratch the bulb. You or
others could be injured. Be sure
to read and
follow the instructions on the bulb package.
1. Remove the four
retainer screws and
the retainer.
5-55

2. Pull the connector out
and unplug the lamp.
3. Plug the new lamp into the connector.
4. Reverse Steps 1 and 2 to reinstall the headlamp.
Composite Headlamps
1. Open the hood.
2. Remove the two
screws from the
sidemarkedturn
signal lamp.
5-56

4. Press the tab and
turn the socket
counterclockwise to
remove the socket from
the bezel: If the socket
does not have a
tab, turn the socket
counterclockwise
to remove the socket
from the bezel.
5. Remove the old bulb from the socket and replace it
6. Reverse Steps 1 through 4 to reinstall the taillamp.
with a new one.
Replacement Bulbs
Exterior Lamp I Bulb Number
I
Halogen
Headlamps
Sealed Beam 1 H6054
I Halogen Headlamps Composite I9006 (Low Beam) I
5-6 1

Wheel Alignment and Tire Balance If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new
GM
The wheels on your vehicle were aligned and balanced original
equipment parts. This way, you will be sure to
carefully at the factory to give you the longest tire life have
the right wheel, wheel bolts and wheel nuts for
and best overall performance.
your
vehicle.
Scheduled wheel alignment and wheel balancing are
not needed. 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 or corroded.
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 dealer
if any of these conditions exist.
Your dealer will know the kind of wheel you need.
Each new wheel should have the same load-carrying
capacity, diameter, width, offset and be mounted
the same way as the one it replaces. the wrong replacement wheels, wheel
bolts or wheel nuts on your vehicle can be
dangerous.
It could affect the braking and
handling of your vehicle, make your tires lose
air and make you lose control. You could have
a collision
in which you or others could be
injured. Always use the correct wheel, wheel
bolts and wheel nuts for replacement.
Notice: The wrong wheel can also cause problems
with bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper height,
vehicle ground clearance and tire or tire chain clearance to the body and chassis.
See
Changing a Flat Tire on page 5-71 for more
information.
-~
5-69

Electrical System
Add-on Electrical Equipment
Notice: Don’t add anything electrical to your vehicle
unless you check with your dealer first. Some
electrical equipment can damage your vehicle and
the damage wouldn’t be covered by your warranty.
Some add-on electrical equipment can keep other
components from working
as they should.
Your vehicle has an air bag system. Before attempting to
add anything electrical to your vehicle, see
Servicing
Your Air Bag-Equipped Vehicle on page
1-69.
Headlamp Wiring
The headlamp wiring is protected by a circuit breaker in
the lamp switch. An electrical overload will cause the
lamps to flicker on and
off, or in some cases to remain
off. If this happens, have your headlamp wiring
checked right away.
Windshield Wiper Fuses
The windshield wiper motor is protected by a circuit
breaker and a fuse.
If the motor overheats due to heavy
snow, etc., the wiper will stop until the motor cools.
Although the circuit is protected from electrical overload,
overload due to heavy snow, etc., may cause wiper
linkage damage. Always clear ice and heavy snow
from the windshield before using the windshield wipers.
If the overload
is caused by some electrical problem
and not snow, etc., be sure to get it fixed.
Power Windows and Other
Power Options
Circuit breakers in the fuse panel protect the power
windows and other power accessories. When the
current load is too heavy, the circuit breaker opens and
closes, protecting the circuit until the problem is fixed
or goes away.
5-92

FuseKircuit Usage
Breaker
1
2
Stop/Turn/Hazard Lamps,
Center High Mounted Stop Lamp,
Anti-Lock Brakes
Radio Accy, Rear Seat
Audio Controls
FuseKircuit
Breaker
3
4
5
6
8
9
Usage
Courtesy Lamps, Glove Box Lamp,
Dome Reading Lamps, Vanity Mirror
Lamps, Courtesy Lamps
Daytime Running Lamps Relay,
Instrument Panel Cluster
Rear Defogger
Cruise Module, Truck Body Control Module, Instrument Panel Cluster,
Cruise Control Switch,
Electrochromic Mirror
Power Outlets, DLC,
Subwoofer Amplifier
Crank Circuit Fuse, ParWNeutral
Switch, Starter Enabler Relay
License Plate Lamp, Tailamps,
Parking Lamps, Ashtray Lamp,
Panel Lights, Trailer Taillamps,
Front and Rear Sidemarker Lamps,
Door Switch Illumination, Headlamp
Switch Illumination, Rear Seat
Audio Illumination, Truck Body
Control Module
5-94