lock CHEVROLET ASTRO CARGO VAN 2004 2.G Service Manual

Notice:Using a razor blade or sharp object to clear
the inside rear window may damage the rear
window defogger. Repairs would not be covered by
your warranty. Do not clear the inside of the rear
window with sharp objects.
Outlet Adjustment
Move the thumbwheel in the center of the outlets up or
down to change the direction of airow.
Operation Tips
Clear away any ice, snow or leaves from the air
inlets at the base of the windshield that may
block the ow of air into your vehicle.
Use of non-GM approved hood deectors may
adversely affect the performance of the system.
Keep the path under the front seats clear of objects
to help circulate the air inside of your vehicle more
effectively.
3-19

Anti-Lock Brake System
Warning Light
With the anti-lock brake system, this light will come
on when you start your engine and may stay on
for several seconds. That’s normal.
If the light stays on, or comes on when you’re driving,
your vehicle needs service. If the regular brake system
warning light isn’t on, you still have brakes, but you don’t
have anti-lock brakes. If the regular brake system
warning light is also on, you don’t have anti-lock brakes
and there’s a problem with your regular brakes. See
“Brake System Warning Light” earlier in this section.
The anti-lock brake system warning light should
come on briey when you turn the ignition key to RUN.
If the light doesn’t come on then, have it xed so it
will be ready to warn you if there is a problem.
Engine Coolant Temperature Gage
This gage shows
the engine coolant
temperature. If the
gage pointer moves
to the red area, your
engine is too hot!
It means that your engine coolant has overheated.
If you have been operating your vehicle under normal
driving conditions, you should pull off the road, stop your
vehicle and turn off the engine as soon as possible.
SeeEngine Overheating on page 5-29. United States
Canada
3-28

Security Light
This light will come on
briey when you turn the
ignition key to START.
The light will stay on until the engine starts. If the light
ashes, the Passlock
®System has entered a tamper
mode. If the vehicle fails to start, seePasslock®
on page 2-17.
If the light comes on continuously while driving and
stays on, there may be a problem with the Passlock
®
System. Your vehicle will not be protected by Passlock®,
and you should see your GM dealer.
Service All-Wheel Drive Light
This light should come on
briey 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.
3-33

Setting the Time for Radios
with the Set Button
Press and release the SET button. Within ve seconds,
press and hold the left SEEK arrow until the correct
hour appears on the display. Press and hold the right
SEEK arrow until the correct minute appears on
the display.
Setting the Time for Radios
with HR and MN Buttons
Press and hold HR until the correct hour appears on
the display. Press and hold MN until the correct minute
appears on the display. To display the time with the
ignition off, press RECALL, HR, or MN and the time will
appear on the display for a few seconds. There is an
initial two-second delay before the clock goes into
the time-set mode.
AM-FM Radio
Playing the Radio
Power:Turn the VOLUME knob to turn the system
on and off.
VOLUME:Turn this knob to increase or to decrease
the volume.
RECALL:Press this knob to switch the display between
the radio station frequency and the time. When the
ignition is off, press this knob to display the time.
3-36

SCV (Speed-Compensated Volume):With SCV, the
audio system adjusts automatically to make up for
road and wind noise as you drive.
Set the volume at the desired level. Turn the control
ring behind the upper knob clockwise to increase
the SCV. Each notch on the control ring allows for
more volume compensation at faster vehicle speeds.
Then, as you drive, SCV automatically increases
the volume, as necessary, to overcome noise at any
speed. The volume level should always sound the
same to you as you drive. To turn SCV off, turn the
control all the way down.
Finding a Station
AM FM:Press this button to switch between FM1, FM2,
and AM. The display will show the selection.
TUNE:Press this knob lightly so it extends. Turn it to
select radio stations. Push the knob back into its stored
position when you are not using it.
oSEEKp:Press the right or the left arrow to go to
the next or previous station and stay there.
To scan stations, press and hold either SEEK arrow for
two seconds until SCAN appears on the display. The
radio will go to a station, play for a few seconds, then go
on to the next station. Press either SEEK arrow again
to stop scanning.
The radio will only seek and scan stations with a strong
signal that are in the selected band.
P.SCAN (Preset Scan):Press this button and the radio
will go to the rst preset station stored on the
pushbuttons, play for a few seconds then go on to the
next preset station. P.SCAN will appear on the
display. Press this button again or one of the
pushbuttons to stop scanning presets.
The radio will only scan the preset stations with a strong
signal that are in the selected band.
3-39

AM FM:Press this button to switch between FM1,
FM2, or AM. If the front seat passengers are listening
to the radio, the RSA will not switch between the bands
or change the frequency.
Press AM FM to listen to the radio when a CD is
playing. The inactive CD will remain safely inside the
radio for future listening.
wSEEKx:When listening to the radio, press the
up or the down arrow to go to the next or to the previous
station and stay there. This function is inactive if the
front seat passengers are listening to the radio.
To scan preset stations, press and hold either SEEK
arrow until SCAN appears on the radio display.
The radio will go to a station, play for a few seconds,
then go on to the next station. Press either SEEK arrow
again to stop scanning. This function is inactive if the
front seat passengers are listening to the radio.
When a CD is playing, press the up arrow to go to
the next track on the CD. Press the down arrow to go
to the start of the current track if more than eight
seconds have played. This function is inactive if the
front seat passengers are listening to a CD.P.SET PROG (Preset Program):Press this button to
scan the preset radio stations set on the pushbuttons
on the main radio. The radio will go to a preset station,
play for a few seconds, then go on to the next preset
station. Press this button again to stop scanning.
This function is inactive if the front seat passengers
are listening to the radio.
TAPE CD:Press this button to play CD when listening
to the radio.
Theft-Deterrent Feature
THEFTLOCK®is designed to discourage theft of
your vehicle’s radio. It works by using a secret code
to disable all radio functions whenever battery power
is interrupted.
The THEFTLOCK
®feature for the radio may be used or
ignored. If ignored, the radio plays normally and the
radio is not protected by the feature. If THEFTLOCK
®
is activated, the radio will not operate if stolen.
When THEFTLOCK
®is activated, LOC will appear on
the radio display to indicate a locked condition anytime
battery power has been interrupted. If the battery
loses power for any reason, you must unlock the radio
with the secret code before it will operate.
3-44

Activating the Theft-Deterrent Feature
The instructions which follow explain how to enter
your secret code to activate the THEFTLOCK®
system. Read through all nine steps before starting
the procedure.
If you allow more than 15 seconds to elapse between
any steps, the radio automatically reverts to time
and you must start the procedure over at Step 4.
1. Write down any three or four-digit number from
000 to 1999 and keep it in a safe place separate
from the vehicle.
2. Turn the ignition on.
3. Turn the radio off.
4. Press the 1 and 4 pushbuttons at the same time.
Hold them down until --- appears on the display.
Next you will use the secret code number which
you have written down.5. Press MN and 000 will appear on the display.
6. Press MN again to make the last two digits agree
with your code.
7. Press HR to make the rst one or two digits agree
with your code.
8. Press AM FM after you have conrmed that the
code matches the secret code you have written
down. REP will appear on the display to indicate
that Steps 5 through 7 need to be repeated to
conrm your secret code.
9. Press AM FM again. SEC will appear on the display
to indicate that the radio is secure. The LED
indicator by the volume knob will begin ashing
when the ignition is turned off.
3-45

Unlocking the Theft-Deterrent Feature
After a Power Loss
Enter your secret code as follows; pause no more
than 15 seconds between steps:
1. Turn the ignition on. LOC will appear on
the display.
2. Press MN and 000 will appear on the display.
3. Press MN again to make the last two digits agree
with your code.
4. Press HR to make the rst one or two digits agree
with your code.
5. Press AM FM after you have conrmed that the
code matches the secret code you have written
down. The display will show SEC, indicating
the radio is now operable and secure.
If you enter the wrong code eight times, INOP will appear
on the display. You will have to wait an hour with the
ignition on before you can try again. When you try again,
you will only have three chances, eight tries per chance,
to enter the correct code before INOP appears.
If you lose or forget your code, contact your dealer.
Disabling the Theft-Deterrent Feature
Enter your secret code as follows; pause no more than
15 seconds between steps:
1. Turn the ignition on.
2. Turn the radio off.
3. Press and hold the 1 and 4 pushbuttons at the
same time until SEC appears on the display.
4. Press MN and 000 will appear on the display.
5. Press MN again to make the last two digits agree
with your code.
6. Press HR to make the rst one or two digits agree
with your code.
7. Press AM FM after you have conrmed that the
code matches the secret code you have written
down. --- will appear on the display, indicating that
the radio is no longer secured.
If the code entered is incorrect, SEC will appear on the
display. The radio will remain secured until the correct
code is entered.
When battery power is removed and later applied to
a secured radio, the radio will not turn on and LOC will
appear on the display.
To unlock a secured radio, seeUnlocking the
Theft-Deterrent Feature After a Power Lossearlier
in this section.
3-46

Your Driving, the Road, and Your Vehicle..........4-2
Defensive Driving...........................................4-2
Drunken Driving.............................................4-2
Control of a Vehicle........................................4-5
Braking.........................................................4-6
Locking Rear Axle..........................................4-8
Steering........................................................4-9
Off-Road Recovery.......................................4-11
Passing.......................................................4-11
Loss of Control.............................................4-13
Driving at Night............................................4-14
Driving in Rain and on Wet Roads..................4-15
City Driving..................................................4-18Freeway Driving...........................................4-19
Before Leaving on a Long Trip.......................4-20
Highway Hypnosis........................................4-21
Hill and Mountain Roads................................4-22
Winter Driving..............................................4-24
If You Are Stuck: In Sand, Mud,
Ice or Snow..............................................4-28
Towing..........................................................4-29
Towing Your Vehicle.....................................4-29
Recreational Vehicle Towing...........................4-29
Loading Your Vehicle....................................4-29
Towing a Trailer...........................................4-35
Section 4 Driving Your Vehicle
4-1

Anti-lock Brake System
Your vehicle has anti-lock brakes. 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.
If there is a problem with the anti-lock brake system,
this warning light will stay on. SeeAnti-Lock Brake
System Warning Light on page 3-28.Let us say the road is wet and you are driving safely.
Suddenly, an animal jumps out in front of you. You
slam on the brakes and continue braking. Here is what
happens with ABS:
A computer senses that wheels are slowing down.
If one of the wheels is about to stop rolling, the computer
will separately work the brakes at each front wheel
and at both rear wheels. United States
Canada
4-7