transmission CHEVROLET ASTRO 2003 Service Manual

22,500 Miles (37 500 km)
0 Change engine oil and filter (or every 12 months,
0 Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
whichever
occurs first).
An Emission Control Service.
whichever occurs first). (See footnote
#).
needed. Check constant velocity joints and axle seals
for leaking.
page
5-64 for proper rotation pattern and additional
information. (See footnote
+).
Ll Rotate tires. See Tire Inspection and Rotation on
30,000 Miles (50 000 km)
Cl Change engine oil and filter (or every 12 months,
0 Lubricate chassis components (or every 12 months,
U Check readfront axle fluid level and add fluid as
whichever occurs first). An Emission Control Service.
whichever occurs first). (See footnote
#).
needed. Check constant velocity joints and axle seals
for leaking.
0 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 fluid 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.
if you do not use your vehicle under any of these
conditions, change the
fluid and filter every
50,000 miles (83 000 km).
Ll Rotate tires. See Tire Inspection and Rotation on
page 5-64 for proper rotation pattern and additional
information.(See footnote
+).
(See footnote t).
Control Service.
B Replace fuel filter. An Emission Control Service.
0 Replace engine air cleaner filter. An Emission
6-20

37,500 Miles (62 500 km)
CI Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service.
Ll Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
whichever
occurs first).
(See footnote #).
needed. Check constant velocity joints and axle seals
for leaking.
page 5-64 for proper rotation pattern and additional
information.
(See footnote +).
D Rotate tires. See Tire Inspection and Rotation on
45,000 Miles (75 000 km)
0 Change engine oil and filter (or every 12 months,
0 Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
whichever occurs
first).
An Emission Control Service.
whichever occurs first). (See footnote #).
needed. Check constant velocity joints and axle seals
for leaking.
0 Change automatic transmission fluid 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.
If you do not use your vehicle under any of these
conditions, change the fluid and filter every
50,000 miles (83 000 km).
0 Rotate tires. See Tire Inspection and Rotation on
page
5-64 for proper rotation pattern and additional
information.
(See footnote +).
50,000 Miles (83 000 km)
0 If you haven’t used your vehicle under severe
conditions listed previously and, therefore, haven’t
changed your automatic transmission fluid, change
both the fluid and filter.
U Change transfer case fluid.
6-2 1

52,500 Miles (87 500 km)
CI Change engine oil and filter (or every 12 months,
0 Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
whichever occurs first).
An Emission
Control Service.
whichever occurs first). (See footnote #).
needed. Check constant velocity joints and axle seals
for leaking.
page 5-64 for proper rotation pattern and additional
information.
(See footnote +).
0 Rotate tires. See Tire Inspection and Rotation on
60,000 Miles (100 000 km)
0 Change engine oil and filter (or every 12 months,
0 Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
whichever occurs first).
An Emission Control Service.
whichever occurs first). (See footnote #).
needed.
Check constant velocity joints and axle seals
for leaking.
0 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 fluid 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.
If you do not use your vehicle under any of these
conditions, change the fluid and filter every
50,000 miles
(83 000 km).
0 Rotate tires. See Tire Inspection and Rotation on
page 5-64
for proper rotation pattern and additional
information.
(See footnote +).
(See footnote t).
Control Service.
0 Replace fuel filter. An Emission Control Service.
0 Replace engine air cleaner filter. An Emission
6-22

67,500 Miles (112 500 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service.
0 Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
whichever occurs first).
(See footnote #).
needed.
Check constant velocity joints and axle seals
for leaking.
0 Rotate tires. See Tire lnspection and Rotation on
page 5-64
for proper rotation pattern and additional
information.
(See footnote +).
75,000 Miles (125 000 km)
CI Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service.
whichever occurs first). (See footnote #).
U Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.
0 Change automatic transmission fluid 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.
If you do not use your vehicle under any of these
conditions, change the fluid and filter every
50,000 miles
(83 000 km).
0 Rotate tires. See Tire lnspection and Rotation on
page 5-64
for proper rotation pattern and additional
information.
(See footnote +).
6-23

82,500 Miles (137 500 km)
0 Change engine oil and filter (or every 12 months,
0 Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
whichever
occurs first).
An Emission Control Service.
whichever occurs first). (See footnote #).
needed. Check constant velocity joints and axle seals
for leaking.
page 5-64 for proper rotation pattern and additional
information.
(See footnote +).
0 Rotate tires. See Tire Inspection and Rotation on
90,000 Miles (150 000 km)
0 Change engine oil and filter (or every 12 months,
0 Lubricate chassis components (or every 12 months,
0 Check rear/front axle fluid level and add fluid as
whichever
occurs first).
An Emission Control Service.
whichever occurs first). (See footnote #).
needed. Check constant velocity joints and axle seals
for leaking.
0 For Two-Wheel-Drive vehicles only: Clean and repack
the front wheel bearings (or at each brake relining,
whichever occurs first).
Q Change automatic transmission fluid 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.
If you do not use your vehicle under any of these
conditions, change the fluid and filter every
50,000 miles (83 000 km).
0 Replace fuel filter. An Emission Control Service.
(See footnote
t).
0 Replace engine air cleaner filter. An Emission
Control Service.
0 Rotate tires. See Tire Inspection and Rotation on
page
5-64 for proper rotation pattern and additional
information.
(See footnote +).
6-24

97,500 Miles (162 500 km)
U Change engine oil and filter (or every 12 months,
0 Lubricate chassis components (or every 12 months,
0 Check readfront axle fluid level and add fluid as
whichever occurs first).
An Emission Control Service.
whichever
occurs first). (See footnote #).
needed. Check constant velocity joints and axle seals
for leaking.
page 5-64 for proper rotation pattern and additional
information.
(See footnote +).
0 Rotate tires. See Tire Inspection and Rotation on
100,000 Miles (166 000 km)
0 Inspect spark plug wires. An Emission Control
U Replace spark plugs. An Emission Control Service.
Service.
0 If you haven’t used your
vehicle under severe service
conditions listed previously and, therefore, haven’t
changed your automatic transmission fluid, change
both the fluid and filter.
150,000 Miles (240 000 km)
U Drain, flush and refill cooling system (or every
60 months since last service, whichever occurs first).
See
Engine Coolant on page 5-28 for what to use.
inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.
An Emission Control Service.
U Inspect engine accessory drive belt. An Emission
Control Service.
0 Change transfer case fluid.
0 Inspect Positive Crankcase Ventilation (PCV) valve.
An Emission Control Service.
6-25

Wiper Blade Check
Inspect wiper blades for wear or cracking. Replace
blade inserts that appear worn or damaged or that
streak or miss areas of the windshield. Also see
Cleaning the Outside of Your Vehicle on page 5-86.
Spare Tire Check
At least twice a year, after the monthly inflation check
of the spare tire determines that the spare is inflated to
the correct tire inflation pressure, make sure that the
spare tire is stored securely. Push, pull, and then
try
to rotate or turn the tire. If it moves, use the wheel
wrench
to tighten the cable. See Changing a
Flat Tire on page 5-71.
Weatherstrip Lubrication
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth. During very cold,
damp weather more frequent application may be
required. See
Part D: Recommended Fluids and
Lubricants on page
6-32.
Automatic Transmission Check
Check the transmission fluid level; add if needed.
See
Automatic Transmission Fluid on page 5-25.
A fluid loss may indicate a problem. Check the
system and repair
if needed.
At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specified in Part D.
Body Lubrication Service
Lubricate all body door hinges, the body hood, fuel door
and rear compartment hinges, latches and locks
including interior glove box and console doors, hood
latch assembly, secondary latch, pivots, spring anchor,
release pawl and any moving seat hardware. Lubricate
the hood safety lever pivot and prop rod pivot. Part D
tells you what to use. More frequent lubrication may be
required when exposed
to a corrosive environment.
6-27

Starte’ emvitnCI Check
When you are doing this check, the vehicle
could move suddenly.
If it does, you or others
could be injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. See
Parking Brake on page 2-26 if necessary.
Do not use the accelerator pedal, and be ready to
turn
off the engine immediately if it starts.
3. Try to start the engine in each gear. The starter
should work only in PARK (P) or NEUTRAL
(N).
If the starter works in any other position, your
vehicle needs service.
Automatic Transmission Shift Lock
Co
-. - - I System Check
When you are do J this checl , he vehicle
could move suddenly.
If it does, you or others
could be injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a level
surface.
2. Firmly apply the parking brake. See
Parking Brake
on page 2-26
if necessary.
Be ready to apply the regular brake immediately
if the vehicle begins to move.
position, but don’t start the engine. Without applying
the regular brake, try to move the shift lever out
of PARK (P) with normal effort. If the shift lever
moves out of PARK (P), your vehicle needs service.
3. With the engine off, turn the key to the RUN
6-28

Ignition Transmission Lock Check Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake,
While parked, and with the parking brake set,
tw to turn set the parking brake.
the ignition key to LOCK in each shift lever position.
0 The key should turn to LOCK only when the
0 The key should come out only in LOCK.
shift
lever is in PARK (P).
Parking Brake and Automatic
Transmission Park
(P) Mechanism
C’ leck
When you are doing this check, your vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front
of your vehicle in
case it begins to roll. Be ready to apply the
regular brake at once should the vehicle begin
to move.
To check the parking brake’s holding ability:
With the engine running and transmission in
NEUTRAL (N), slowly remove foot pressure from
the regular brake pedal.
Do this until the vehicle is
held by the parking brake only.
To check the PARK (P) mechanism’s holding
ability: With the engine running, shift to PARK (P).
Then release the parking brake followed by the
regular brake.
Underbody Flushing Service
At least every spring, use plain water to flush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
6-29

Part D: Recommended Fluids
and Lubricants
Fluids and lubricants identified below by name, part
number or specification may be obtained from your
dealer.
Engine Coolant
t
I
Hydraulic
Brake System
Windshield Washer Solvent
Fluid/Lubricant
Engine oil with the American
Petroleum Institute Certified for
Gasoline Engines starburst symbol
of the proper viscosity.
To determine
the preferred viscosity for your
vehicle’s engine, see
Engine Oil
on page 5- 15.
50/50 mixture of clean, drinkable
water and use only DEX-COOL
Coolant. See
Engine Coolant on
page
5-28.
Delco Supreme 11 Brake Fluid
or equivalent DOT-3 brake fluid.
GM Optikleen Washer Solvent
or equivalent.
Usage I Fluid/Lubricant
~~~~~
Chassis Lubricant (GM Part
No. U.S. 12377985, in Canada
88901242, or equivalent) or lubricant meeting requirements of
NLGl #2, Category LB or GC-LB. Parking Brake
Cable Guides
GM Power Steering Fluid
(GM Part
No. US. 1052884, in
Canada 993294, or equivalent).
System Power
Automatic
I DEXRON-Ill Automatic
Transmission
Transmission
Fluid.
Key Lock
Cylinders Multi-Purpose
Lubricant, Superlube
(GM Part No.
U.S. 12346241,
in Canada 10953474, or equivalent).
Chassis Lubrication Chassis Lubricant (GM Part
No. U.S. 12377985,
in Canada
88901 242, or equivalent) or lubricant
meeting requirements of NLGl#2,
Category LB or GC-LB.
Front Wheel
Bearings Wheel
bearing lubricant meeting
requirements of NLGl#2,
Category GC or GC-LB (GM Part
No. U.S. 1051344,
in Canada 993037, or equivalent).
6-32