service CHEVROLET CORVETTE 1994 4.G Workshop Manual

Downloaded from www.Manualslib.com manuals search engine Service and Appearance Care
NOTICE:
Don’t let someone put in the
wrong kind of fluid. For example,
just a few drops of mineral-based
oil, such as engine oil, in your
brake system can damage brake
system parts
so badly that they’ll
have to be replaced.
Brake fluid can damage paint,
so
be careful not to spill brake fluid
on your vehicle. If you
do, wash it
off immediately. See “Appearance
Care” in the Index.
Brake Wear
Your Corvette has four-wheel disc brakes.
Disc brake pads have built-in wear
indicators that make a high-pitched
warning sound when the brake pads are
worn and new pads are needed. The
sound may come and go or be heard all
the time your vehicle is moving (except
when you are pushing
on the brake pedal
firmly).
I NOTICE:
I
Continuing to drive with worn-out
brake pads could result in costly brake repair.
Some driving conditions or climates may
cause a brake squeal when the brakes are
first applied or lightly applied. This does not mean something is wrong with your
brakes. Brake linings should always be
replaced as complete axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does
not return to normal height, or if there is
a rapid increase in pedal travel. This
could be a sign of brake trouble.
Brake Adjustment
As you make brake stops, your disc
brakes automatically adjust for wear.
Replacing Brake System Parts
The braking system on a modern vehicle
is complex. Its many parts have to be of
top quality and work well together
if the
vehicle is to have really good braking.
Vehicles we design and test have
top-quality GM brake parts in them, as
your Corvette does when it is new. When
you replace parts of your braking system
- for example, when your brake linings
wear down and you have to have new
ones put in
- be sure you get new
genuine GM replacement parts. If you
don’t, your brakes may no longer work
properly. For example,
if someone puts
in brake linings that are wrong for your
vehicle, the balance between your front
and rear brakes can change, for the worse. The braking performance you’ve come to
expect can change in many other ways
if
someone puts in the wrong replacement
brake parts.
. . .I94

Downloaded from www.Manualslib.com manuals search engine Battery
Every new Corvette has a Delco
Freedom@ battery.
You never have to add
water to one of these. When it’s time for
a new battery, we recommend a Delco
Freedom@ battery. Get one that has the catalog number shown on the original
battery’s label. For battery replacement,
see your dealer or the Corvette Service
Manual.
To purchase a service manual,
see “Service Publications” in the Index.
Vehicle Storage
If you’re not going to drive your vehicle
for
25 days or more, take off the black,
negative
(-) cable from the battery. This
will help keep your battery from running
down. Contact your
dealer to learn how to
prepare your vehicle for longer storage
periods.
Bulb Replacement
For the proper type of replacement bulb,
see “Replacement Bulbs” in the Index.
Halogen Bulbs
Headlight
1. Open the hood.
2. The headlights need to be halfway
open. Turn the headlight switch on,
then quickly back to the parking lights
setting.
You may have to do this a few
times to get the half-open position.
You can also open the headlights
manually. See “Concealed
Headlights”
in the Index.
of the headlight.
3. Remove the two screws on each side
195..

Downloaded from www.Manualslib.com manuals search engine Service and Appearance Care
4. Remove the two screws from both
sides of the cover. Before you remove
the last screw, put your hand under the
cover to hold it.
5. Reach around the hood and pull the
cover straight out. Be careful not to
scratch the paint.
6.
7.
8.
9.
Remove the four screws from the
retainer near each corner of the
headlight. Don’t move the large-head
adjusting screws or your headlight
will not be aimed properly.
Hold the headlight and remove the
retainer.
Remove the headlight and unplug the
electrical connector.
Reverse the steps with a new
headlight.
Fog Lamp
You can reach the fog lamps from under
the front bumper.
1. Remove the screw in the access door.
Open the door.
1/8 turn and pull it out.
wiring harness.
2. Turn the bulb base counterclockwise
3. Disconnect the bulb base from the
4. Reverse the steps with a new bulb.
. . ,196

Downloaded from www.Manualslib.com manuals search engine Service and Appearance Care
2. Pull the lens out.
3. Push the bulb in, turn it
counterclockwise, then pull it out.
4. Reverse the steps with a new bulb. To
prevent water from getting inside the
lens, make sure the lens seal is
properly positioned.
. . .I98
lack-up Light
I'ou can reach the back-up lights by
emoving the license plate and reaching
hrough the opening.
. Push the tab on the socket and turn it
counterclockwise.
!. Push the bulb in, turn it
counterclockwise, then pull it out.
1. Reverse the steps with a new bulb.

Downloaded from www.Manualslib.com manuals search engine Service and Appearance Care
2. Push the bulb in, turn it
counterclockwise, then pull it out.
3. Reverse the steps with a new bulb.
0
Rear Cargo Compartment Light
1. Pry the cover off with a screwdriver.
Be sure to pry from the rear side, or
you could break the tab on the cover.
(Coupe)
2. Remove the bulb.
3. Reverse the steps with a new bulb.
Rear Cargo Compartment Light
(Convertible)
1.
2.
3.
Pry the cover off with a screwdriver.
Remove the bulb.
Reverse the steps with a new bulb.
:enter High-Mounted Stoplight
Except ZR-1)
‘ou can reach the center high-mounted
toplight by removing the license plate
nd reaching through the opening.
. Turn the socket counterclockwise 1/4
turn and pull it out.
. . .200

Downloaded from www.Manualslib.com manuals search engine Service and Appearance Care
6. Rock the bulb back and forth while
pulling up to remove it.
7. Reverse the steps with a new bulb.
. . ,202
Windshield Wiper
Blades
It's a good idea to rotate the wiper blade
assembly
180" every six months. This
changes the wear pattern and makes the
wiper blade insert last longer.
To rotate 01
replace the wipers:
1.
2.
3.
Pull the wiper arm away from the
windshield.
You should be able to see part of a
spring near where the blade connects
to the arm. Press down on the spring
with a screwdriver and pull the wiper
blade
off.
Rotate the blade and push it back ontc
the arm.
TIRE-LOADING INFORMATION
FRT. CRT.
RR. TOTAL LBS KG 3 3 2 MAX. LOADING @ GVWR SAME AS VEHICLE a 1199 544
CAPACITY WEIGHT BBW OCCUPANTS VEHICLE CAP.
wi.
TIRE SIZE
60/410
3 9
INFORMATION 0 F
/
I Loading Your Vehicle
Two labels on your vehicle show how
nuch weight it may properly carry. The
rire-Loading Information label found on
he driver's door tells you the proper size,
'peed rating and recommended inflation
n-essures for the tires on your vehicle.
t also gives you important information
ibout the number
of people that can be in
Tour vehicle and the total weight that
TOU can carry. This weight is called the
iehicle Cabacity Weight and includes the
weight of all occupants, cargo, and all
lonfactory-installed options.

Downloaded from www.Manualslib.com manuals search engine t .'
Service and Appearance Care
Tires
We don't make tires. Your new vehicle
comes with high quality tires made by
a leading tire manufacturer. These tires
are warranted by the tire manufacturers
and their warranties are delivered with
every new Corvette. If your spare tire
is
a different brand than your road tires,
you will have a tire warranty folder
from each
of these manufacturers.
. . .204

Downloaded from www.Manualslib.com manuals search engine Extended Mobility Tires (omoiv)
If your Corvette has optional Goodyear
Extended Mobility Tires (EMT’s), the tires will have “EMT” molded on the
sidewalls. These tires perform
so well
without any air that a Low Tire Pressure
Warning System (LTPWS)
is used to
alert you if a tire has lost pressure.
A
“LOWELAT TIRE” light will appear on
your Driver Information Center if a tire’s
inflation pressure is less than
25 psi
(1 70 kPa). If the “LOWELAT TIRE”
light comes on, check your tire pressures
as soon as you can. See “Low Tire
Pressure Warning System” in
the Index
for additional information.
If a tire goes flat, you won’t need to stop
on the side of the road to change the tire.
You can just keep on driving. The shorter
the distance you drive and the slower the
speed, the greater the chance that the tire
will not have to be replaced. If you drive on
a deflated EMT for distances
of
50 miles (80 km) or less and at speeds of
55 mph (90 km/h) or less, there is a good
chance that the tire can be repaired. The
tire can operate effectively with no air
pressure for up to
200 miles (320 km) at
speeds up to
55 mph (90 km/h), but the
tire would then have to be replaced. Also
remember: When a tire is filled with air, it
provides a cushion between the road and
the wheel. Because you do not have this
cushion when driving on a deflated tire,
try to avoid potholes that could damage
your wheel and require replacement of it.
Some road hazards can damage a tire
beyond repair. This damage could occur
before you’ve driven on the tire in a
deflated condition. Whenever a tire has
been damaged, or if you’ve driven any
distance on a deflated EMT, check with
a Goodyear EMT Service Center to
determine whether the tire can be
repaired or should be replaced. To
maintain your vehicle’s extended
mobility feature, all replacement tires
must be Extended Mobility Tires.
See the Goodyear Extended Mobility Tire
Owner’s Manual and Limited Warranty
supplied with your Corvette for additional
information.
205. .

Downloaded from www.Manualslib.com manuals search engine Service and Appearance Care
Inflation - Tire Pressure
The Tire-Loading Information label which is on the driver’s door shows the correct
inflation pressures for your tires, when they’re cold. “Cold” means your vehicle has
been sitting for at least three hours or driven no more than a mile.
For competitive driving or high-speed driving (over
150 mph or 240 krn/h), make
sure your tires are inflated to
35 psi (240 kPa). When you end this type of driving,
reduce the “cold” inflation pressures (if necessary) to those listed
on the
Tire-Loading Information label.
NOTICE:
Don’t let anyone tell you that underinflation or overinflation is all right. It’s not.
If your tires don’t have enough air (underinflation) you can get:
0 Too much flexing
0 Too much heat
0 Tire overloading
0 Bad wear
0 Bad handling
Bad fuel economy.
If your tires have too much air (overinflation), you can get:
Unusual wear
Bad handling
0 Rough ride
Needless damage from road hazards.
When to Check: Check your tires
mce
a month or more. Don’t forget
your compact spare tire. It should be at
50 psi (420 Wa).
How to Check: Use a good quality
pocket-type gauge to check tire
pressure. Simply looking at the tires
will not tell you the pressure,
=specially if you have radial tires
-
which may look properly inflated even
if they’re underinflated.
Lf your tires have valve caps, be sure to
put them back on. They help prevent
leaks by keeping out dirt and moisture.
Tire Rotation
I’he tires on your Corvette are
lirectional, asymmetrical, and are
different sizes front to rear. Due to this,
your tires should not be rotated. Each
tire and wheel should be used only in
the position it is in.
. . .206

Downloaded from www.Manualslib.com manuals search engine I
When It’s Time for New Tires
One way to tell when it’s time for new
tires is to check the treadwear indicators,
which
will appear when your tires have
only
2/32 inch (1.6 mm) or less of tread
remaining.
You need a new tire if
0 You can see the indicators at three or
You can see cord or fabric showing
0 The tread or sidewall is cracked, cut
more places around the
tire.
through the tire’s rubber.
or snagged deep enough to show cord
or fabric.
0 The tire has a bump, bulge or split.
0 The tire has a puncture, cut, or other
damage that can’t be repaired well
because of the size or location of the
damage.
Buying New Tires
To find out what kind and size of tires
you need, look at the Tire-Loading
Information label.
The tires installed on your vehicle when it
was new had a Tire Performance Criteria
Specification (TPC Spec) number on each
tire’s sidewall. When you get new tires,
get ones with that same TPC Spec
number. That way, yobr vehicle will
continue to have tires that are designed
to give proper endurance, handling,
speed rating, traction, ride and other
things during normal service on your
vehicle. If your tires have an all-season
tread design, the TPC number will be
followed by a
“MS” (for mud and snow).
If you ever replace your tires with those
not having a TPC Spec number, make
sure they are the same size, load range,
speed rating and construction type (bias,
bias-belted or radial) as your original
tires.
Uniform Tire Quality Grading
The following information relates to the
system developed by the United States
National Highway Traffic Safety
Administration which grades tires by
treadwear, traction and temperature
performance. (This applies only to
vehicles sold in the United States.)
Treadwear
The treadwear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled conditions
207. . .