1994 CHEVROLET CORVETTE maintenance schedule

Downloaded from www.Manualslib.com manuals search engine Service and Appearance Care
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.

Downloaded from www.Manualslib.com manuals search engine 5.7L LT1 (Code P)
Power Steering Fluid
How to Check Power Steering Fluid:
Unscrew the cap and wipe the dipstick with a clean rag. Replace the cap and
completely tighten it.
5.7L LT5 (Code J)
Then remove the cap again and look at
the fluid level on the dipstick.
0 When the engine compartment is hot,
the level should be at the
“HOT” or
“H” mark.
0 When the engine compartment is cool
the level should be at
the “COLD” or
“C” mark.
What to Add:
Refer to the Maintenance Schedule to
determine what kind
of fluid to use. See
“Recommended Fluids and Lubricants” il
the Index.
191 .
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1
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Downloaded from www.Manualslib.com manuals search engine IMPORTANT:
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 ...

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
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

Downloaded from www.Manualslib.com manuals search engine “Section C: Periodic Maintenance
Inspections” explains important inspections that your Chevrolet dealer’s
service department or another qualified
service center should perform.
“Section
D: Recommended Fluids and
Lubricants” lists some products GM
recommends to help keep your vehicle
properly maintained. These products, or
their equivalents, should be used whether
you do the work yourself or have it done.
“Section
E: Maintenance Record”
provides a place for you to record the
maintenance performed on your vehicle.
Whenever any maintenance
is performed,
be sure to write it down in this section.
This will help you determine when your next maintenance should be done. In
addition,
it is a good idea to keep your
maintenance receipts. They may be
needed to qualify your vehicle for
warranty repairs.
Section A: Scheduled
Maintenance Services
Using Your Maintenance
Schedule
This section tells you the maintenance
services you should have done and
when you should schedule them. Your
Chevrolet dealer knows your vehicle best
and wants you to be happy with
it. If you
go to your dealer for your service needs,
you’ll know that GM-trained and
supported service people will perform the
work using genuine GM parts.
These schedules are for vehicles that:
carry passengers and cargo within
recommended limits. You will find
these limits on your vehicle’s
Tire-Loading Information label. See
“Loading Your Vehicle” in the Index.
are driven on reasonable road surfaces
within legal driving limits.
use the recommended unleaded fuel.
See “Fuel” in the Index.
Selecting the Right Schedule
First you’ll need to decide which of the
two schedules is right for your vehicle.
Here’s how to decide which schedule to
follow:
Schedule I
Is any one of these true for your vehicle?
Most trips are less than 4 miles
Most trips are less than 10 miles
(6 km).
(1 6 km) when outside temperatures are
below freezing.
The engine is at low speed most of the
time (as
in door-to-door delivery, or in
stop-and-go traffic).
You operate your vehicle in dusty
If any one (or more) of these is true for
your driving, follow Schedule I.
Schedule I1
Follow Schedule I1
o& if none of the
above conditions is true,
areas.
231 . . .

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Section A: Scheduled Maintenance Services (Cont.)
Schedule I
Follow Schedule I if your vehicle is
MAINLY driven under one or more of
the following conditions:
0 When most trips are less than 4 miles
(6 km).
When most trips are less than 10 miles
(16 km) and outside temperatures
remain below freezing.
0 When most trips include extended idling and/or frequent low-speed
operation, as in stop-and-go traffic.
0 When operating in dusty areas.
Schedule
I should also be followed if the
vehicle
is used for delivery service. police,
taxi or other commercial applications.
* An Emission Control Service.
t 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 vehicle usefil life. General
Motors, however, urges that all recommended
maintenance services be performed at the
indicated intervals and the maintenance be
recorded in “Section E: Maintenance Record.”
WHAT TO SERVICE
See “Explanation of Scheduled
Schedules
I and II.
ITEM NO. Maintenance Services” following
WHEN TO PERFORM
Miles (kilometers) or Months
(whichever occurs first).
I I
1 I Engine Oil and Filter Change* 1 Every 3,000 miles (5 000 km) or 3 months.
2 I Chassis Lubrication I Every other oil change.
3
Cooling System Service” 4
Engine Adkessory Drive Belt Inspection
Every 30,000 miles (50 000 km) or 24 months.
5 I Transmission Service I
See “Explanation of Scheduled Maintenance
Services” following Schedules
I and 11.
6
7
Every 100,000 miles (166 000 km).
Spark Plug Replacement*
Every
30,000 miles (50 000 km).
Spark flug Wire Inspection*?
8 I Air Cleaner Filter Replacement* I
See “Explanation of Scheduled Maintenance
Services” following Schedules
I and 11.
9 I Fuel Tank, Cap and Lines Inspection*t Every 30,000 miles (50 000 km).
. . .232

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Section A: Scheduled Maintenance Services (Cont.)
Schedule /I
Follow Schedule I1 ONLY if none of
the driving conditions specified in
Schedule
I apply.
* An Emission Control Service.
t The US. 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 vehicle useful life. General
Motors, however, urges that all recommended
maintenance services be performed at the
indicated intervals and the maintenance be
recorded in “Section E: Maintenance Record.”
. . ,234
ITEM NO.
2
3
4
5
6
-
-
7
8
-
9 -
WHAT TO SERVICE
See “Explanation of Scheduled
Maintenance Services” following
Schedules
I and II.
WHEN TO PERFORM
Miles (kilometers) or Months
(whichever occursfirst).
Engine Oil Change* Every 7,500 miles (12 500 km) or 12 months.
Oil Filter Change* At fist and every other oil change.
Chassis Lubrication Every
7,500 miles (12 500 krn) or 12 months.
Engine Accessory Drive Belt Inspection
Cooling Svstem Service* Every
30,000 miles (50 000 km) or 24 months.
Transmission Service
I
See “Explanation of Scheduled Maintenance
Services” following Schedules
I and 11.
Spark Plug Replacement* Every 100,000 miles (166 000 km).
Spark Plug Wire
Inspection*t Every 30,000 miles (50 000 km).
Air Cleaner Filter Replacement* I
See
“Explanation of Scheduled Maintenance
Services” following Schedules
I and 11.
Fuel Tank, Cap and Lines Inspection*t I Every 30,000 miles (50 000 km).

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
C L Section A: Scheduled Maintenance Services (Cont.)
Explanation of Scheduled
Maintenance Services
Following are explanations of the services
listed in Schedule I and Schedule
11.
The proper fluids and lubricants to use are
listed in Section D. Make sure whoever
services your vehicle uses these. All parts
should be replaced and all necessary
repairs done before you or anyone else
drives the vehicle.
NOTE: To determine your engine’s
displacement and code, see
“Engine Identification” in the
Index.
ITEM
NO. SERVICE
1 Engine Oil and Filter Change* -
Always use SH or SG Energy
Conserving I1 oils of proper
viscosity. The engine requires a
special oil meeting GM Standard
GM4718M. Oils meeting this
Standard may be identified as
synthetic, and should also be
identified as API Service
SH or
SG. However, not all Synthetic
API Service
SH oils will meet
ITEM
NO. SERVICE
this GM Standard. You should
look for and use only an oil that
meets GM Standard GM4718M.
To determine the preferred
viscosity for your vehicle’s
engine (e.g.,
SAE 5W-30 or SAE
10W-30), see “Engine Oil” in
the Index.
Your vehicle has an Engine Oil
Life Monitor. This monitor will
show you when to change the oil
- usually between 3,000 miles
(5 000 km) and 7,500 miles
( 12 500 km) since your last oil
change. Under severe conditions
the indicator may come on before
3,000 miles
(5 000 km). Never
drive your vehicle more than
7,500 miles (12
500 km) or 12
months without an oil change.
The system won’t detect dust in
the oil..
So if you drive in a dusty
area be sure
to change your oil
every 3,000 miles
(5 000 km) or
sooner if the “Change Oil” light
comes on.
ITEM
NO.
2
3
4
SERVICE
Remember to reset the Oil Life
Monitor when the oil has been
changed. For more information, see “Engine Oil Life Monitor”
in the Index.
Chassis Lubrication
- Lubricate
suspension and steering linkage.
Lubricate the transmission shift
linkage, and parking brake cable guides, underbody contact points
and linkage.
Engine Accessory Drive Belt(s) Inspection
- Inspect the belt(s)
for cracks, fraying, wear and
proper tension. Replace as needed. (Belts can have many
small cracks in individual ribs
without affecting performance.)
Cooling System Service*
-
Drain, flush and refill the system with
new or approved recycled
coolant conforming to GM
Specification 1825M. Keep
coolant at the proper mixture as
specified. See “Coolant” in the
* An Emission Control Service.
. . .236