maintenance schedule CHEVROLET CORVETTE 1993 4.G Owners Manual

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How to Use this Manual
Ushg Your 7993 Corvette
Owner’s Manual
Many people read their owner’s manual
from beginning to end when they first
receive their
new vehicle. This will help
you learn about
the features and
controls for
your vehicle. In this
manual, you’ll find that pictures and
words
work together to explain things
quickly.
There
are nine parts with color-tabbed
pages
in this manual. Each part begins
with
a brief list of contents, so you can
usually tell at a- glance if that part
contains the infomation you want.
You can bend the manual slightly to
reveal the color tabs that help-
you find a
Part.
--
L.
Part 1: Seats & Safety Belts
This part tells you how to use your seats
and safety belts properly.
Part 2: fleatures & Controls
This part explains how to start and
operate your Corvette.
Part 3: Comfort Controls & Audio
Systems
This part tells you how to adjust the
ventilation and com€ort controls, and
how to
operate your audio system.
Part 4 Your Driving and the Road
Here you’ll find helpful information an(
tips about the road and how to drive
under different conditions.
d
Part 5: Problems on the Road
This part tells you what to do if you
have a problem while driving, such as a
flat tire
or engine overheating.
Part 6 Senrice & Appearance Care
Here the manual tells you how to keep
your Corvette
running properly and
looking good.
Part 7: Maintenance Schedule
This part tells you when to perform
vehicle maintenaxice
and what fluids
and hbricm‘ts to use.
Part 8: Customer Assistance
IHormation
This part tells you how to contact
Chevrolet for assistance and how to get
service publications. It also gives you
information on Reporting Safety
Defects.
Part 9: Index
Here’s an alphabetical listing of almost
every subject in this manual. You can
use it to quickly find something you
want to read.
Service Station Information
This is a quick re€erence of service
information.
You can find it on the last
page of this manual.

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Sevvice & Appearance Care
Engine Block Heater
(LTl ENGINE, CANADA ONLY)
An engine block heater can be a big
help if you have to park outside in very
cold weather, 0°F (-18°C) or colder. If
your vehicle has an engine block heater,
see the index under Engine Block
Heater.
154
What to Do with Used, Oil Air Cleaner
A
Used engine- oil contains.
things that have caused skin ..
,cancer in laboratory animals. Don't
let used oil stay.on your .skin for
very long. Clean you skin and nails
with soap and water, or a good
hand cleaner. Wash or properly
throw away ciuthing or rags
containing used
engine oil.
Refer to the Maintenance Schedule to
determine when
to replace the air filter.
Used
oil can be a real threat to the
environment. If you change your own
oil, be sure to drain all free-flowing oil
from the filter before disposal. Don't
ever dispose of oil by pouring it on the
ground, into sewers, or into streams or
bodies
of water. Instead, recycle it by
taking it to a place that collects used oil.
If you have a problem properly
disposing
of yo-ur used oil, ask your:
dealer, a service station or a local
recycling center €or
help.
L
;ee the Index under Scheduled
taintmame. Services.
I
CAUTION I

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I vice &..Appearance Care
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Throttle Cable Adjusters
Your 1993 Corvette is equipped with
special throttle cable :adjusters.
If you
need-
to adjust the throttle. on your
engine; please see a qualified Chevrolet
,dealer or. refer to the 1993 Corvette-
Service Manual.
256
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. Refer to the
Mairitenance Schedule-to determine.
when,to change.your fluid. See the
Index under Scheduled Maintenance
Seruices .
How to Check:
Because this operation can be a little
d-#icuft, you. may choose to have :this
dorie at .a Chevrolet dealership Sejrvice
If you do it yourself, be sure. to follow all
the instructions here, or. you could get a
false zeading on the dipstick.
Dt?p,ElI-tment..

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c How to Add Fluid:
Refer to the Maintenance Schedule to
determine
what kind oftransmission
fluiil to use. See the Index under Fluids.
G Lubricants.
If the fluid level is low, add only enough
of the proper fluid to bring. the level up
to the COLD area.for a cold-check or
the-HQT
area for a-.hot ‘check. It
doesn’t take much fluid, generally legs
than a pint. Don’t overfill. We
recommend
you use only fluid IabeIed
DEXRON@-JIE, because fluids with that
label are made especially
for your
automatic transmission.. Damage caused
by fluid other than DEXXO-Nq-IIE is not
covtir,ed by your-new vehicle warranty.
After adding fluid, recheck the fluid
level as described under How to Check.
When the correct fluid level is obtained,
push
the dipstick back in all the way.
Manual Transmission Fluid
When to Check
A good time to have it checked is when
the
engine oil is changed. Howevw, tbe
fluid in your-manual transmission
doesn’t require-changing.
How to Check:
Becguse this operation can be a iittie
difficult,
you may choose to-have this
done at a Chevrolet dealership Service
Department.
If you do it y.Ourself, be sure to follow
all the instrvctiuns here, or you could
get a false reading.

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Manual Transmisskm fluid
(CONT.)
Check the fluid level only when your
engine is
off, the vehicle is parked on a
level place and the transmission is cool
enough for you to rest your fingers on
the transmission case.
Then, Follow These Steps:
1. Remove the filler plug.
2. Check that the lubricant level is up to
the bottom .df the filler plug hale.
3. If the fluid level is good, install the
plug and be sure it is fully seated. If I
the fluid level is low, add more fluid
as described in the next step.
260
How to Add Fluid:
When you need to add fluid, put in
enough to, bring the level up to -the
bottom of the filler plug hole in the
transmission case. Refer to the
Maintenance Schedule to determine
what
kind of fluid. to use. See the Index
under Fluids G Lubricants.
I
.. .. ,.*Ti
Hydraulic C/ufch
(MANUAL TRANSMISSION)
The clutch linkage in your vehicle is
self-adjusting.
When to Check and What to Use:
Refer to the Maintenance Scheduleb bo
determine how often you should check
the fluid level in your clutch master
cylinder reservoir
and what to add. See
the Index under Owner Checks G.
Sewices and Fluids ,& Lubricants.
HOW to Check and Add Fluid
The clutch master cylinder is under
the Engine Control Module (ECM) in
the left rear area of the engine
compartment.
To check the fluid, look at the area
between the
ECM and the battery.

Downloaded from www.Manualslib.com manuals search engine To add fluid, the ECM unit rnust.be
moved.
Loosen the two nuts-on the ECM unit.
With the
LT1 engine, there is one nut
on the outboard side
o€ the ECM unit
-and
one nut on the inboard side. With
the
LT5 engine, both nuts are on the
inboard side
of the ECM unit.
Move the unit to either side. Do not
disconnect
any wires.
Fluid should be added if the fluid level
iS at
or below the ADD mark on the
reservoir. There are additional.
instructions on the
reservoir cap.
When returning the
ECM to its proper
pasition, make
sure the bolts are
aligned with the: slotsin
the bracket.
Then gently push
down on the unit.
When.replacing
the unit, be careful not
to overtighten the nuts.
Rear Axle
When to Check Lubricant:
Refm to the Maintenance Schedule to
determine how often to check the
lubricant. See the
Index under Periodic
Maintenance Inspections.
How to Check Lubricant:
If the-levelis below the bottom 0.f the
filler
plug hole, you'll need to add some
lubricant, Add enough lubricant to raise
the level to the bottom of the filler plug-
hole.
26 I

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How To Check Power Steering Fluid
Unscrew the cap and wipe the dipstick
with a clean-rag. Replace the cap and
completely tighten
it. Then remove the
cap again and look
at- the fluid level on
the dipstick,
When .the engine imnpartrnent is hot,
the level should be at the HOT or H
mark.
cool, the level should be atthe FULL
COLD or C mark.
When the engine compartment is
What t,o Add:
Refer to the Maintenance Schedule- to
determine what.kind
of fluid to use. 'See.
the
Index under Fluids G Lubricants.
II NOflCE
Windshield Washer Fluid
To Add:
Open t,he.cap labeled WASHER .
FLUID ONLY. Add washer fluid until
the^ bottle is full.
.

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....... ,.
I his part covers the, maintenance
required for
your Corvette. Your
vehicle needs these services to retain
its safety, dependability and emission
control performance.
r-I I
Have you purchased the GM
Protection Plan?
The Plan supplements your new
vehicle warranties. See your
Chevrolet dealer for details.
part 7
Maintenance Schedule
Section
.Introduction
A Word About Maintenance .......................................................... 322
Your Vehicle and the Environment ................................................. 322
How This Part is. Organized ........................................................... 323
Using- Your Maintenance Schedules ............................................... 324
Selecting the Right Schedule ........................................................... 324
Schedule I ........................................................................\
............... 3.26
Schedule I1 ........................................................ ~ .............................. 328
Explanation of Scheduled Maintenance Services ......................... 330
At Each Fuel Fill ........................................................................\
...... 333
At -Least Once a Month ................. ...:. ....... ..;. .................... ;.. ............. 333
At Least Once A Ye ar..., .................................................................... 334
A. Scheduled Maintenance Services 4
B. Owner Checks & Services
C. Periodic Maintenance Inspections ....................................................... 336
D. Recommended Fluids &-Lubricants ............................................... ..... 337
E. Maintenance Record ........................................................................\
...... 340
32 I

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Introduction
A Word About Maintenance
We at General Motors want to help you keep your vehicle in
good working condition. But we don’t know exactly how
you’ll drive it. You may drive very short distances only a few
times a week. Or you may drive long distances all the time
in very hot, dusty weather.
You may use your vehicle in
making deliveries. Or you may .drive it to work, to do
errands or in many other ways.
Because
of all the different ways people use their GM
vehicles, maintenance needs vary. You may even need more
frequent che~ks and replacements than you will find in the
schedules
in this part. So please read this part and note how
you drive. If you have any questions on how to keep your
vehicle
in good condition, see your Chevrolet dealer, the
place many GM owners choose to have their maintenance
work done. Your dealer cq be relied upon to use proper
parts and practices.
Your Vehicle and the Environment
Proper vehicle maintenance not only helps to keep your
vehicle in good woxking condition, but
also helps the
environment.
All recommended maintenance procedures are
important. Improper vehicle maintenance or the removal
of
important components can significantly affect the quality of
the air we breathe. Improper fluid levels or even the wrong
tire inflation can increase the level
of emissions from your
vehicIe.
To help protect our environment, and to help keep
your vehicle in good condition, please maintain your vehicle.
properly.

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How This Part is Organized
The remainder of this part is divided intu five secti.ons:
Section
A: Scheduled Maintenance Services shows .what to.
.have done and how often. Some of these servicescan be
complex, so unless. you are. technically qualified and have-
the necessary equipment, you should let your deder's
service department or another qualified service center do
these jobs.
A
Performing maintenance -work on a vehicle &I be
dangerous. XnXrying.to do some jabs, you can be
sericiusly injured, Do your own maintenance work, only
if you have the required .know-how and the proper tools
and equipment for the job. If yuu have any doubt, have
a qualified technician do the work:
Ifyou 'are sldi,ed enough to do some work on your vehicle,
you will probably want to get the service infamation GM
publishes. You will find a list of publications and how to get
them in this manual, See the index under Service
Publications.