turn signal CHEVROLET ASTRO 1999 User Guide

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4-37 Making Turns
NOTICE:
Making very sharp turns while trailering could
cause the trailer to come in contact with the
vehicle. Your vehicle could be damaged. Avoid
making very sharp turns while trailering.
When you're turning with a trailer, make wider turns than
normal. Do this so your trailer won't strike soft shoulders,
curbs, road signs, trees or other objects. Avoid jerky or
sudden maneuvers. Signal well in advance.
Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle has to have extra
wiring (included in the optional trailering package).
The arrows on your instrument panel will flash
whenever you signal a turn or lane change. Properly
hooked up, the trailer lamps will also flash, telling other
drivers you're about to turn, change lanes or stop.When towing a trailer, the arrows on your instrument
panel will flash for turns even if the bulbs on the trailer
are burned out. Thus, you may think drivers behind you
are seeing your signal when they are not. It's important
to check occasionally to be sure the trailer bulbs are
still working.
Driving On Grades
Reduce speed and shift to a lower gear before you start
down a long or steep downgrade. If you don't shift
down, you might have to use your brakes so much that
they would get hot and no longer work well.
When towing at high altitude on steep uphill grades,
consider the following: Engine coolant will boil at a
lower temperature than at normal altitudes. If you turn
your engine off immediately after towing at high altitude
on steep uphill grades, your vehicle may show signs
similar to engine overheating. To avoid this, let the
engine run while parked (preferably on level ground)
with the automatic transmission in PARK (P) for a few
minutes before turning the engine off. If you do get the
overheat warning, see ªEngine Overheatingº in
the Index.

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4-39 Trailer Wiring Harness
If you have the optional trailering package, your vehicle
will have an eight
-wire harness, including the center
high
-mounted stoplamp battery feed wire. The harness
is stored on the passenger's side of the vehicle near the
rear wheel well. This harness has a 30 amp battery feed
wire and no connector, and should be wired by a
qualified electrical technician. After choosing an
aftermarket trailer mating connector pair, have the
technician attach one connector to the eight
-wire trailer
harness and the other connector to the wiring harness on
the trailer. Be sure the wiring harness on the trailer is
taped or strapped to the trailer's frame rail and leave it
loose enough so the wiring doesn't bend or break, but
not so loose that it drags on the ground. The eight
-wire
harness must be routed out of your vehicle between the
rear door and the floor, with enough of the harness left
on both sides so that the trailer or the body won't pull it.
If you do not have the optional trailering package, your
vehicle will still have a trailering harness. The harness is
located near the passenger's side rear wheel well. It
consists of six wires that may be used by after
-market
trailer hitch installers. The technician can use the
following color code chart when connecting the wiring
harness to your trailer.
Brown: Rear lamps.

Yellow: Left stoplamp and turn signal.

Dark Green: Right stoplamp and turn signal.

White (Heavy Gage): Ground.

Light Green: Back
-up lamps.

White (Light Gage): Center High
-Mounted
Stoplamp.

Blue: Auxiliary circuit (eight
-wire harness only).

Orange: Fused auxiliary (eight
-wire harness only).
Store the harness in its original place. Wrap the
harness together and tie it neatly so it won't
be damaged.

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5-2
Hazard Warning Flashers
Your hazard warning flashers let you warn others. They
also let police know you have a problem. Your front and
rear turn signal lamps will flash on and off.
The hazard warning flasher button is located on top of
the steering column.
Press the button down to make your front and rear turn
signal lamps flash on and off. Your hazard warning
flashers work no matter what position your key is in,
and even if the key isn't in.
To turn off the flashers, press the button down again.
When the hazard warning flashers are on, your turn
signals won't work. They also won't flash while
you're braking.

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6-38
Composite Headlamps
1. Open the hood.
2. Remove the two screws
from the sidemarker/turn
signal lamp.
3. Completely remove the sidemarker/turn signal lamp
by pulling out the assembly and disconnecting the
sidemarker/turn signal lamp sockets from the lamp.

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6-40
6. Remove the
composite assembly.
7. Turn the halogen
bulb counterclockwise
to remove from
the assembly.
8. Install the new bulb into the composite assembly by
turning it clockwise until it is completely tightened.
9. Replace the composite assembly by installing and
tightening all of the screws previously removed.Front Turn Signal Lamps
1. Remove the two screws at the inside edge of the
parking/turn signal lamp assembly.
2. Remove the
lamp assembly.
3. Squeeze the tab on the
side of the lamp socket
while turning the socket
counterclockwise.
4. Pull the socket out of the lamp assembly.
5. Pull the bulb from the socket.
6. Gently push the new bulb into the socket.
7. Put the socket back into the lamp assembly and turn
it clockwise until it locks.
8. Put the parking/turn signal lamp assembly back into
the vehicle and tighten the screws.

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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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6-66
Replacement Bulbs
Exterior Lamps Quantity Trade No.
Halogen Headlamps
- Sealed Beam2 H6054
Halogen Headlamps
- Composite2
9006 (Low-Beam)
Halogen Headlamps
- Composite2
9005 (High-Beam)
Parking, Turn Signal Lamps 2 3157NA
Rear, Stoplamps 2 2057
Sidemarker Lamps 4 194
Back
-up Lamps2 1156

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9-4
Electrical Equipment, Adding 2-18, 3-29, 6-60 . . . . . . . . . .
Electrical System 6-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine 6-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner/Filter 6-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant 6-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Heater 2-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Level Check 7-41 . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling System Capacity 6-67 . . . . . . . . . . . . . . . . . . . . . . .
Cover 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust 2-13, 2-27, 2-28, 2-30, 4-27, 4-34, 4-35 . . . . . . .
Fuse Block 6-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Level Check 7-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overheating 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Running While Parked 2-28 . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 6-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your 2-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Gage 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil 6-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additives 6-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Gage 2-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Used 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When to Change 6-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust, Engine 2-13, 2-27, 2-28, 2-30, 4-27, 4-34, 4-35 . .
Express-Down Window 2-30 . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior Lamps 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fabric Cleaning 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling a Portable Fuel Container 6-7 . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter
Air Cleaner Replacement 6
-69 . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil 6-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Finish Care 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Finish Damage 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
First Gear 2-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flashers, Hazard Warning 5-2 . . . . . . . . . . . . . . . . . . . . . . . . .
Flat Tire, Changing 5-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Capacities 6-67, 6-68 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluids and Lubricants 7-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign Countries, Fuel 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
French Language Manual ii. . . . . . . . . . . . . . . . . . . . . . . . . . .
Front
Axle 6
-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Area 2-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing 5-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal Lamp Bulb Replacement 6-40 . . . . . . . . . . . . .
Fuel 6-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling a Portable Container 6-7 . . . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gage 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Foreign Countries 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Regulator 2-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses and Circuit Breakers 6-61 . . . . . . . . . . . . . . . . . . . . . . .

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9-11
Temperature 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treadwear 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uniform Quality Grading 6-47 . . . . . . . . . . . . . . . . . . . . . . .
Wear Indicators 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Replacement 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . .
When It's Time for New 6-46 . . . . . . . . . . . . . . . . . . . . . . .
Top Strap 1-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque Lock 2-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque, Wheel Nut 5-30, 6-67 . . . . . . . . . . . . . . . . . . . . . . . . .
Towing
Recreational 4
-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Your Vehicle 5-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer
Brakes 4
-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving on Grades 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving with 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Towing 4-38 . . . . . . . . . . . . . . . . . . . . .
Parking on Hills 4-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tongue Weight 4-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Weight on Tires 4-33 . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signals 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Harness 4-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmission Fluid, Automatic 6
-20 . . . . . . . . . . . . . . . . . . . .
Transmitters, Keyless Entry 2-7 . . . . . . . . . . . . . . . . . . . . . . . .
Transportation, Courtesy 8-8 . . . . . . . . . . . . . . . . . . . . . . . . . .
Trip Odometer 2-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TTY Users 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal and Lane Change Signals 2-32 . . . . . . . . . . . . . . .
Turn Signal/Multifunction Lever 2-31 . . . . . . . . . . . . . . . . . . .
Turn Signals When Towing a Trailer 4-37 . . . . . . . . . . . . . . . .
Tw o-Way Manual Seat 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Underbody Flushing Service 7-44 . . . . . . . . . . . . . . . . . . . . .
Underbody Maintenance 6-57 . . . . . . . . . . . . . . . . . . . . . . . . .
Underhood Electrical Center 6-64 . . . . . . . . . . . . . . . . . . . . . .
Universal Transmitter 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle
Control 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage Warnings iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 6
-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification Number 6-59 . . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage 6-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation System 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visor Vanity Mirrors 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visors, Sun 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltmeter 2-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .