service schedule CHEVROLET CORVETTE 1994 4.G Owners Manual

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Introduction
Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 7
Part 8
Part 9 '
1994 Owner's Manual
Table of Contents
How to Use This Manual 7 :!&$@
Seats & Restraint Systems 11
Features & Controls = = 35
Comfort Controls & Audio Systems 105
Your Driving and the Road = 121
Problems on the Road 141
Service & Appearance Care 171
Maintenance Schedule 229
Customer Assistance Information 251 m
Index .................... ............... 261
Service Station Information a Last Page
g%y,$pL%>
*"xr7*i.. * .?*2<;.piV$;'
Including "Reporting Safety Defects" on page 254.
Printed in U.S.A. Part No. 10260941 A Second Edition
1 ..

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Manual
5.-
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.
Index: A good place to look for what
you need is the In-dex in back of the
manual. It’s an alphabetical list of all
that’s iq the manual, and the page
number where you’ll find it.
Parts 1-8: Each part of this manual
begins with a brief list of its contents,
so
you cap often find at a glance if a part
Eontains the information you want.
How to Use This Manual: This part
tells you how to use your manual and
includes safety and vehicle damage
warnings and symbols.
Part 1 - Seats & Restraint Systems:
This part tells you how to use your seats
and safety belts properly. It also
explains the
air bag system.
Part 2 - Features & 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 comfort controls and
how to
operate your sound system.
Part 4 - Your Driving and the Road:
Here you’ll find helpful information
and tips about the road and how to drive
under different conditions.
Part 5 - Problems on the Road: This
>art tells you what to do if you have a
Jroblem while driving, such as a flat
:ire or engine overheating, etc.
Part 6 - Service & Appearance
Care:
Here the manual tells yqap how
:o keep your Corvette running ’’:;’.
properly and looking good. ’,:.
Part 7 - Maintenance Schedule:
This part tells when to perfom,,vehicle
maintenance and what fluids
a&l
lubricants to use.
Part 8 - Customer Assistanc?
~nformation:
This part includ&
important information about rdiorting
safety defects and gives you &$$ls
about the “Roadside Assistancq?
program. You will also find cG$@mer
satisfaction phone numbers (ir&luding
customer satisfaction numbers .for the
hearing and speech impaired),
&s well
as the mediationhrbitration prokedure.
We’ve also included ordering
information for service publicagions in
this part.
Service Station Information: This is
a quick reference of service
information. You can find it
on the last
page of this manual.
..
I ‘I ,
7 I ...

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Zharging System Light
rhis light will come on when you turn on
he ignition, but the engine is not running
LS a check to show you it is working. It
ihould go out when the engine starts. If
t stays on or comes on while you are
Iriving, you may have a problem with
he electrical charging system. It could
ndicate that you have a loose or broken
lrive belt or another electrical problem.
3ave it checked right away. Driving whil
his light is
on could drain your battery.
:f you must drive a short distance with thl
ight on, be certain to turn
off all your
tccessories, such as the radio and air
:onditioner.
loor Ajar Light
’his light comes on when you open one
If the doors with the ignition on. It stays
In until you fully close the door. Have
‘our vehicle serviced if the light comes
In and stays on even when the doors are
ully closed.
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1
Sngine Oil Life Monitor
?he “CHANGE OIL” light comes on for
, few seconds when you turn the ignition
In. It will come on and stay on when it’s
ime to change your oil.
:he monitor uses oil temperature and
rngine revolutions to decide when the oil
s nearly worn out. The light is only a
eminder, though. You should change
‘our oil at the intervals recommended in
‘our Maintenance Schedule, even if the
‘CHANGE
OIL” light hasn’t come on.
3e sure to reset the monitor when your oil
s changed, even if the “CHANGE OIL”
ight didn’t come on. If you don’t reset
he monitor, it won’t work correctly.
Tollow these steps:
... 94

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5.7L LT1 (Code P)
Air Cleaner
Refer to the Maintenance Schedule to
determine when to replace the air filter.
See “Scheduled Maintenance Services” in
the Index.
. . .182
5.7L LT5 (Code J)
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.

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5.
0
0
Reverse the steps.
Align the tabs
to the slots in the
bottom of the assembly before you
replace it.
Install the short knob into the middle
hole first. Then install the longer
knobs into the outer holes.
Automatic Transmission Fluid
When to Check and Change
4 good time to check your automatic
:ransmission fluid level is when the
mgine oil is changed. Refer to the
Maintenance Schedule to determine when
co change your fluid. See “Scheduled
Maintenance Services” in the Index.
How to Check
Because this operation can be a little
iifficult, you may choose to have this
done at a Chevrolet dealership Service
Department.
[f 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 dam-
age your transmission.
Too much can
mean that some of the fluid could
come out and fall
on hot engine parts
or exhaust system, 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
0 At high speed for quite a while.
0 In heavy traffic - especially in hot
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).
To check 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 (10°C)’ drive the
vehicle in
“D’ (Third Gear) until the
engine temperature gage moves and then
remains steady for ten minutes. Then follow the hot check procedures.
To check transmission fluid cold: A cold
check is made after the vehicle has been sitting for eight hours or more with the
engine
off and is used only as a reference.
Let the engine run at idle for five minutes
if outside temperatures are 50” F ( 1 OOC)
or more. If it’s colder than 50°F ( 10°C)’
you may have to idle the engine longer.
Should the fluid level be low during a
90°F (32°C).
weather.
. . .184

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;ake much fluid, generally less than a pint.
Don’t overfill. We recommend you use
mly fluid labeled DEXRON@-111 or
DEXRON@-IIE, because fluids with that
label are made especially for your
automatic transmission. Dama e caused
by fluid other than DEXRON -111 or
DEXRON@-IIE is not covered by your
new vehicle warranty.
0 After adding fluid, recheck the fluid
level as described under “How to
Check.”
obtained, push the dipstick back in all
the way.
D
0 When the correct fluid level is
Manual Transmission Fluid
How to Check:
Because this operation can be difficult,
you may choose to have this done at a
Chevrolet dealership Service Department.
If you do it yourself, be sure to follow all
the instructions here, or you could get a
false reading.
. . .I86
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, starting a fire. Be
sure to get an accurate reading if
you
check your transmission fluid.
:heck the fluid level only when your
mgine is
off, the vehicle is parked on a
eve1 place and the transmission is cool
:nough for you to rest your fingers on
he transmission case. Then, follow these steps:
1. Remove the filler plug.
2. Check that the lubricant level is up to
the bottom of the filler plug hole.
3. If the fluid level is good, install the
plug and be sure it is fully seated. If
the fluid level is low, add more fluid
as described in the next steps.
How to Add Fluid:
Here’s how to add fluid. Refer to the
Maintenance Schedule to determine what
kind of fluid to use. See “Recommended
Fluids and Lubricants”
in the Index.
1. Remove the filler plug.

Downloaded from www.Manualslib.com manuals search engine 2. Add fluid at the filler plug hole. Add only enough fluid to bring the fluid
level up to the bottom
of the filler
plug hole.
3. Install the filler plug. Be sure the plug
is fully seated.
Hydraulic Clutch
The clutch linkage in your vehicle is
self-adjusting. The clutch master cylinder
reservoir is filled with hydraulic clutch
fluid.
It isn’t a good idea to “top
off’ your
clutch fluid. Adding fluid won’t correct a
leak.
A fluid loss in this system could indicate
a problem. Have the system inspected and
repaired.
When to Check and What to Use
Refer to the Maintenance Schedule to
determine how often you should check
the fluid level in your clutch master
cylinder reservoir and for the proper fluid. See
“Owner Checks and Services’’ and
“Recommended Fluids and Lubricants”
in the Index.
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.
To add fluid, remove the ECM unit.
187 ...

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Remove the nut on the outboard side
of the unit. Then loosen the front and
inboard nuts. For the LT5 engine, loosen
the two inboard nuts. Move the ECM unit
to either side.
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
position, make sure the bolts are aligned
with the slots in the bracket. Then gently
push down on the unit. When replacing
the unit, be careful not to over-tighten the
nuts -just tighten them until they are
snug.
. . * 188
Rear Axle
When to Check Lubricant
Refer to the Maintenance Schedule
to determine how often to check the
lubricant. See “Periodic Maintenance
Inspections” in the Index.
How to Check Lubricant
If the level is below the bottom of 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.
What to Use:
To add lubricant when the level is low, use
Axle Lubricant (GM Part
No. 12345977)
or
SAE 8OW-90 GL-5 gear lubricant.
To completely refill after draining,
add 4 ounces (1 18 ml) of Limited-Slip
Differential Lubricant Additive (GM Part
No. 1052358). Then fill to the bottom of
the filler plug hole with Axle Lubricant
(GM Part
No. 12345977) or SAE 8OW-90
GL-5 gear lubricant.
Engine Coolant
The following explains your cooling
system and how to add coolant when
it
is low. If you have a problem with
engine overheating or
if you need to add
coolant to your high fill reservoir, see
“Engine Overheating” in the Index.
The proper coolant for your Corvette will:
0
0
0
0
0
Give freezing protection down to -34°F (-37°C).
Give boiling protection up to 262°F
(128°C).
Protect against rust and corrosion.
Help keep the proper engine
temperature.
Let the warning lights work as they
should.

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KEEP THE ENGINE OIL
AT THE PROPER
LEVEL AND CHANGE AS
RECOMMENDED
This part covers the
maintenance required for your
Corvette
. Your vehicle needs
these services to retain its
safety. dependability and
emission control performance
.
.
Maintenance Schedule
Section
Introduction: A Word about Maintenance ........................ 230
A .
B .
C .
D .
E .
Your Vehicle and the Environment ......................... 230
How This Part Is Organized ............................... 230
Scheduled Maintenance Services ............................ 231
Using Your Maintenance Schedule
......................... 231
Selecting the Right Schedule
.............................. 231
Schedule1
............................................. 232
Schedule11
............................................ 234
Explanation
of Scheduled Maintenance Services .............. 236
Owner Checks and Services ................................ 238
At Each Fuel
Fill ....................................... 238
AtLeastOnceaMonth
.................................. 238
At Least Once
a Year .................................... 239
Periodic Maintenance Inspections ........................... 242
Recommended Fluids and Lubricants ........................ 244
Maintenance Record ...................................... 247
I
Protection
Plan
Have you purchased the GM Protection Plan? The Plan
supplements your new car warranties
.
See your GM dealer for details .
229 ...

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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
checks 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 can
be relied upon to use proper parts and
practices.
Your Vehicle and I
Environment the
Proper vehicle maintenance not only
keeps your vehicle in good working
condition,
but it 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 vehicle. To
help protect our environment, and to help
keep your vehicle in good condition,
please maintain your vehicle properly.
How This Part is Organized
The remainder of this part is divided into
five sections:
“Section
A: Scheduled Maintenance
Services’: shows what to have done, and
how often. Some of these services can be
complex,
so unless you are technically
qualified and have the necessary
equipment, you should let your dealer’s lified
service department or another
qua
service center do these jobs.
If you are skilled enough to do some
work on your vehicle, you will probably
want to get the service information
GM publishes. You will find a list of
publications and how to get them in this
manual. See “Service Publications”
in
the Index.
“Section B: Owner Checks and Services’’
tells you what should be checked whenever you stop for fuel. It also
explains what you can easily do to help
keep your vehicle in good condition.
1
. . .230