trailer CHEVROLET ASTRO 1996 Owner's Manual

As shown in the chart, SAE 5W-30 is best for your
vehicle. However,
you can use SAE 1OW-30 if it’s going
to be
0°F (- 18 “C) or above. These numbers on an oil
container show its viscosity,
or thickness. Do not use
other viscosity oils, such as
SAE 20W-50.
NOTICE:
Use only engine oil with the American Petroleum
Institute Certified For Gasoline Engines
“Starburst” symbol. Failure to use the
recommended oil can result in engine damage
not covered
by your warranty.
GM Goodwrench@ oil meets all the requirements for
your vehicle.
Engine Oil Additives
Don’t add anything to your oil. Your GM dealer is ready
to advise if
you think something should be added.
When to Change Engine Oil
See if any one of these is true for you:
0
0
e
e
e
Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.
Most trips include extensive idling (such
as frequent
driving in stop-and-go traffic).
Most trips are through dusty areas.
You frequently tow a trailer or use a carrier on top
of
your vehicle.
The vehicle is used for delivery service, police, taxi
or other commercial application.
Driving under these conditions causes engine oil to
break down sooner. If any
one of these is true for your
vehicle, then
you need to change your oil and filter
every 3,000 miles
(5 000 km) or 3 months -- whichever
occurs first.
If
none of them is true, change the oil and filter every
7,500 miles (12 500 km) or 12 months -- whichever
occurs first. Driving a vehicle with
a fully warmed
engine under highway conditions causes engine oil to
break down slower.
6-14

Refer to the Maintenance Schedule to determine when to
replace the air filter and the crankcase ventilation filter.
See “Scheduled
N ntenance Services” in the Index.
Operating th, mgine with the air cleaner off
can cause
you or others to be burned. The air
cleaner not only cleans the air, it stops flame if
the engine backfires. If it isn’t there, and the
engine backfires, you could be burned. Don’t
drive with it
off, and be careful working on the
engine with the
air cleaner off.
NOTICE:
If the air cleaner is off, a backfire can cause a
damaging engine fire. And, dirt can easily get
into your engine, which will damage it. Always
have the air cleaner in place when you’re driving.
Automatic Transmission Fluid
When to Check and Change
A good time to check your automatic transmission fluid
level is when the engine oil is changed,
Change both the fluid and filter every
15,000 miles
(25 000 km) if the vehicle is mainly driven under one
or more of these conditions:
In heavy city traffic where the outside temperature
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery service.
If
you do not use your vehicle under any of these
conditions, change
the fluid and filter every
30,000 miles (50 000 km).
See “Scheduled Maintenance Services” in
the Index.
regularly reaches
90°F (32°C) or
higher.
6-20

How to Check
Because this operation can be a little difficult, you
may choose to have this done at your GM dealer
Service Department.
If you do it yourself,
be sure to follow all the instructions
here, or
you could get a false reading on the dipstick.
NOTICE:
Too much or too little fluid can damage your
transmission.
Too much can mean that some of
the fluid could come out and fall on hot engine
parts or exhaust system parts, starting a fire. Be
sure to get an accurate reading if you check your
transmission fluid.
Wait at least 30 minutes before checking the
transmission fluid level if you have been driving:
0 When outside temperatures are above 90°F (32°C).
At high speed for quite a while.
0 In heavy traffic -- especially in hot weather.
0 While pulling a trailer.
To get the right reading, the fluid should be at normal
operating temperature, which is 180°F
to ,200"F
(82°C
to 93°C).
Checking Transmission Fluid Hot
Get the vehicle warmed up by driving about 15 miles
(24 km) when outside temperatures are above 50°F
(10°C). If it's colder than 50°F (lO"C), drive the
vehicle in DRIVE
(D) until the engine temperature gage
moves and then remains steady for
10 minutes. Then
follow the hot check procedures.
6-21

12 18 24
c57 c7 E7 c7 11 17 23
4
c7 c7 E7 E7 10 16 22
3 9 15 21 C7 E7 E7 C7
2
c7 c87 c7 c3 14 20
i
c7 1 7 13 19 c7 c7 c7
FuseKircuit Usage
Breaker
1
2
3
Stop/Turn/Hazard Lamps, CHMSL,
Chime Module
No Fuse-Resistor
Courtesy Lamps, Power Outside Mirrors, Glove Box Lamp, Dome
Reading Lamps, Vanity Mirror Lamps
10
11
12
13
FuseKircuit Usage
Breaker
4 DRL Relay, DRL Module, Chime
Headlamp Switch, Keyless Entry,
Cluster, Overhead Console
Not Used
Cruise Module, Cruise
Activator Switch
Power Outlets, ALDL,
Subwoofer Amplifier
Not Used
License Plate Lamp, Taillamps,
Parking Lamps, Ashtray Lamp, Panel
Lights, Trailer Taillamps, Front and Rear Sidemarker Lamps, Door Switch
Illumination, Headlamp Switch
Illumination, RSA Illumination
Air Bag System
Wiper Motor, Washer Pump
L, M 1, M2 Blower Motor, Rear A/C
Relay Coil, Front Cont, Temp. Door
Motor, Hi Blower Relay, Defogger
Timer Coil, Upfitter Relay Coil
Cigarette Lighter, Door Lock Relay
i
5
6
7
8
9
6-62

15
16
', 17
18
19
Fuse/Circuit Usage Breaker
14 Cluster HVAC Controls, Chime
Module, Radio Illumination, Rear Heat
Switch Illumination, Rear
WiperNasher Switch Illumination,
Rear Liftgate Switch Illumination, Remote Cassette Illumination,
OH Console
DRL Lamps
Front Turn Signals, Rear Turn Signals,
Trailer Turn Signals, Back-up Lamps,
BTSI Solenoid
Radio: ATC (Standby), 2000 Series
(Main Feed), Rear Seat Audio Controls
VCM-Ign 3, VCM- Brake, 4WAL,
Cruise Stepper Motor
Radio: ATC (Main Feed),
2000 Series (Standby)
A
B
Fuse/Circuit Usage
Breaker
20 PRNDLI Odometer, TCC Enable and
PWM Solenoids, Shift
A and Shift B
Solenoids, 3-2 Downshift Solenoids
Not Used
Not Used Rear Wiper, Rear Washer Pump
Not Used
(Circuit Breaker) Power Door Lock,
6-way Power Seat, Keyless Entry
Module, Dutch Door Module, Dutch
Door Release
(Circuit Breaker) Power Windows
21
22
23
24
6-63

Fuse
UPFIT-BATT .......
UPFIT-IGN . .
Spare .....
Fuse Puller*
Spare
.............
Spare .............
ECM-B ............
..
..
HORN ......
A/C COMP ...
RR DEFOG .......
ENG-I ......
IGN-E
..
..
Usage
Upfitter Battery
Power Stud, Trailer Wiring
Harness Upfitter Ignition Relay
Not Used
Not Used Not Used
Fuel Pump Relay,
VCM, Oil Pressure
Switch/Sender
Horn Relay
A/C Enable Relay
Heater-A/C Control Selector Switch
Oxygen Sensors 1-4,
Camshaft Position Sensor,
Mass Air Flow Sensor,
Evaporative Emission
Canister Purge Solenoid
Valve, Linear EGR Valve
Solenoid, VCM
A/C Enable Relay
Fuse
ECM-I ..... .....
LIGHTING .....
BATT I/P .......
IGN A .............
IGN B .............
ABS ..............
AIC ...............
RR HTR/AC ........
Spare .............
Usage
Fuel Injectors 1-6,
Crankshaft Position Sensor,
VCM, Distributor Ignition
Control Module Park Lamps Fuse,
DRL Fuse, Headlamp and
Panel Dimmer Switch
Fuse Block Fuses,
Power Seat CB,
Stop/Hazard Fuse,
Auxiliary Power Fuse,
Cigarette Lighter Fuse,
Radio, Battery Fuse
Starter Relay, Ignition Switch
Ignition Switch
Brake Pressure Module Valve Blower Motor Resistor,
Blower Relay
Auxiliary Heater A/C Relay
Not Used
* A fuse puller is included in the underhood electrical
center. You
will also find spare fuses.
6-65

Maintenance Schedule
Short TripKity Definition
Follow the Short TripKity Maintenance Schedule if any
one
of these conditions is true for your vehicle:
0
0
0
0
0
Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.
Most trips include extensive idling (such
as frequent
driving in stop-and-go traffic).
Most trips are through dusty areas.
You frequently tow a trailer or use a carrier on top of
your vehicle.
If the vehicle is used for delivery service, police, taxi
or other commercial application.
One of the reasons yo~l should follow this schedule if
you operate your vehicle under any of these conditions
is
that these conditions cause engine oil to break
down soonex
Short Trip/City Intervals
Every 3,000 Miles (5 000 km): Engine Oil and Filter
Change (or
3 months, whichever occurs first). Chassis
Lubrication (or
3 months, whichever occurs first). Drive
Axle Service (or
3 months, whichever occurs fust).
At 6,000 Miles (10 000 km) -- Then Every
12,000 Miles
(20 000 km): Tire Rotation.
Every 15,000 Miles (25 000 km): Air Cleaner Filter
Inspection,
if driving in dusty conditions. Front
Wheel Bearing Repack (2WD only) (or at each brake
relining, whichever occurs first). Automatic
Transmission Service (severe conditions only).
Every 30,000 Miles (50 000 km): Air Cleaner Filter
Replacement.
Fuel Filter Replacement. Automatic
Transmission Service (Normal Conditions).
Every 60,000 Miles (100 000 km): Engine Accessory
Drive Belt Inspection. Fuel
Tank, Cap and Lines Inspection.
Every 100,000 Miles (166 000 km): Cooling System
Service (or every
60 months, whichever occurs first).
Spark Plug Wire Inspection. Spark Plug Replacement.
Positive Crankcase Ventilation (PCV) Valve Inspection.
These intervals only summarize nzaintenance services.
Be sure to follow the complete maintenance schedule on
the following pages.
7-4

Short Trip/City Maintenance Schedule
The services shown in this schedule up to 100,000 miles
(166
000 km) should be performed after 100,000 miles
(166
000 km) at the same intervals.
Footnotes
3- The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure
to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior
to the
completion
of the vehicle’s useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the maintenance
be recorded.
# Lubricate the front suspension, ball joints and
kingpin bushings, steering linkage and transfer case
shift linkage, parking brake cable guides and brake
pedal springs. Drive
a
a
a
a
lxle service:
Locking Differential
-- Drain fluid and refill at first
engine oil change. At subsequent oil changes, check
fluid level and add fluid as needed. If driving in
dusty areas or towing a trailer, drain fluid and refill
every
15,000 miles (25 000 km).
Standard Differential
-- Check fluid level and add
fluid as needed
at every oil change. If driving in
dusty areas or towing a trailer, drain fluid and refill
every
15,000 miles (25 000 km).
More frequent lubrication may be required for
heavy-duty use.
7-6

I Short Trip/City Maintenance Schedule I
15,000 Miles (25 000 km)
0 Change engine oil and filter (or every 3 months, whichever occurs first).
0 Lubricate chassis components; see
An Emission Control Service.
footnote ## (or every 3 months, whichever
occurs first).
0 Inspect air cleaner filter if you are driving
in dusty conditions. Replace filter
if
necessary. An Emission Control Service.
0 Check readfront axle fluid level and add
fluid as needed. Check constant velocity
joints and axle seals for leaking.
**
For Two-Wheel-Drive vehicles only: Clean
and repack the front wheel bearings (or at
each brake relining, whichever occurs first).
0 Change automatic transmission flr lid and
filter
if the vehicle is mainly driven under
one or more of these conditions:
- In heavy city traffic where the outside
temperature regularly reaches
90°F
(32°C) or higher.
- In hilly or mountainous terrain.
- When doing frequent trailer towing.
- Uses such as found in taxi, police or
delivery service.
[f you do not use your vehicle under my of
these conditions, change the fluid and filter every
30,000 miles (50 000 km).
7-9

I Short TripKity Maintenance Schedurl
- When doing frequent trailer towing.
- Uses such as found in taxi, police or
delivery service.
If you do not use your vehicle under any of these
conditions, change the fluid and filter every
30,000 miles (50 000 knz).
Rotation’’ in the Index for proper rotation
pattern and additional information. During
tire rotation, check brake calipers for
freedom of movement. Refer to
the
appropriate GM service manual for proper
caliper service procedures.
0 Rotate tires. See “Tire Inspection and
DATE
SERVICED BY ACTUAL MILEAGE
33,000 Miles (55 000 km)
0 Change engine oil and filter (or every
3 months, whichever occurs first).
0 Lubricate chassis components; see
An Emission Control Service.
footnote # (or every 3 months, whichever
occurs first).
0 Check readfront axle fluid level and add
fluid as needed. Check constant velocity
joints and axle seals for leaking.
**
DATE SERVICED BY: ACTUAL MILEAGE
7-13