oil change CHEVROLET CORVETTE 1993 4.G Owners Manual

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Transmitter Range Suggestions:
The range of the Passive Keyless
EMry system is very dependent on
bow
the transmitter is held. For
opthum range hd performance,
hold the transmitter
vertically when
approaching the vehicle.
If the range gradually decreases over
time even though the transiitter is
held
vertically, change the battery in
the transmitter.
The range will decrease if mure than
one3ransmitter is in range at the same
time.
Avoid taking more than one-
transmitter into vehicle range at the
same time.
Do not put the transmitter into a
metal container, which
will prevent
the
.signal from getting- to the vehicle.
hen you move the transmitter into
vehicle range, the
theft deterrent system
automatically disengages and the
driver's door automatically unlocks.
When you move the transmitter out of
vehide range with the' do.ors closed and
the
key out af the ignition, the system
will automatically:
Lock both .dooxs after -a five-second
Immediately arm the theft deterrent
Sound the horn once to signal that
Turn-off the interior lights.
delay.
system.
the doors are locked.
The theft deterrent system will still
operate using the .pma d0.w lock. See
the Index under .Universal The#?
DeZerrenzt.
You mEQT also Llnbclr the passenger
door by pressing the-DOOR-buttoil Qn
the transmitter, and the hatch by
pressing the HATCH button, but only
when the ignition is off.

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LT1 Engine: Engine' Oil temperature
Gage
"LT5 Engiie: Engine Oil Temperature,
Gage
Voltmeter
Your chafging system gage will show
the rate of chafge-.when the engine is
running.
(When the engine is not
running, the- display measures the
voltage-
output of your battery.)
The reading will change sts the rate of
charge changes (with .engine speed,
etc.), but readings between the shaded
are.as indkate the noma1 operating.
range. Readings in either shaded area
indicate-a passible-problem with ydur
charging
system. The CHECK
GAUGES light will come on du-g
both high and.10-w battery voltages. See
your dealer
to have your system
sewiced immediately.
For accurate gage measurements refer
to the. GAUGES button on the Trip
Monitor
(se.e -the In&x under Trip
Monitor).

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1 Engine ~e. oni it or
The Engine Oil Life Monitor us&&
engine oil temperature and engine
revolutions
to 'determine when the oil is
nearly worn out.
There ,is a CHANGE OIL light on the
left side ,of the- instrument cluster. It
comes
on for a fkw seconds as a bulb
check when you sta-rtyour vehicle. It
mrnes on and stays on when it is time
to change yuur oil.
The CHANGE OIL light is only a
reminder.
You should change, your oil at
$he intervals recommended in your
Maintersance- Schedule menif the
CHANGE OIL 1-ight hasn't come on.
Resetting the Engine Oil Life
Monitor:
1, %LEU the key to the Run pasition, but
don't
start the engine.
2. Press the ENG MET button .on the
Trip Monitor. Within five seconds,
press the ENG MET button again.
3. Within five seconds of step 2, press
and hold the GAUGES button on
the Trip Monitor. The CHANGE
OIL light d flash.
4..Hold the GAUGES button until the.
CHANGE OIL light stops flashing
and goes out; This should take about
ten seconds. When the light goes out,
the Engine Oil Life Monitor is reset.
If it doesn't reset, tum the- ignition to
Of€ and repeat the procedure.

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TRIP OD0 Press. this button to.
change the odometer. Ee,ading to- a trip
odometer--teading. P1es.s again ta-retm
the display to the odometer reading.,
The trip odometer can be u-sehl to
measure the actual distance you travel
on a trip. TQ -set it to zero, see TRIP
RESET below. The..adometer will.
ihrninate
with the fgni"tion off .and the
parkifig lights on.
TRIP RESET: With TRIP OD0
selected for, dis.play, .p ms ..and hold.the
TRJP button for two seconds to change
the trip odometer ,reading to zero.
ENG MET This batton chaqp the
display from customary .Uaited States
measures. (English) tu Canadian
measures (mettic).
OH femperature Display
GAUGES: E+& time this button is
prwsed the:
oil temperature
-4 coolant temperature.
.- or battery voltage
will be- digitally displayed.
The displey will change to:
HI OIL
HI COUL
HI VOLT
or LO VOLT,
.If conditions in the. c.prresponding gages
read higher or lower th.m normal.
If the oil mdxoolant ternpxatur.e$ arc
below 32°F (O,*C), the trip monitor will
display LO when the,actual gage
ternpiratwe is displayed I
Coolant Temperature Dtsplay
Battery Voltage Displ,ay

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On She Road
Uidess you are the -only driver, it is good
to share the driving task with others.
Limit turns behind
the wheel to about
100 miles (160 km) Or two hours at a
sitting.-Then, either change drivers ar
stop for some rdreshment like coffee,
tea or
soft drinks and some limbering
up.
But do stop and move around. Eat
lightly along the way. Heavier meals
tend to
mdke some people sleepy.
On two-lane highways or
undivided
multilane highways that do not have
controlled .access,.you’ll
wmt to watch
for some situations :not usustlly found
on freeways. Examples: are: stop signs
and signals, shopping tenters with
direct access
to the highway, no passing
zones and school zones, vehicles
turning
le& and- right off the-road,
pedestrians, cyclists, parked vehicles, and even a&&.
Highway Hypnosis
Is thete-actually such a condition as
“highway hypnosis”? Or
is it just plain
falling asleep at the wheel? Call it
highway hypnosis, lack
of awareness, or
whatever.
There is
something about an easy
stretch
of road with the same scenery,
along with the
hum of the tires on the
road, the drone of the engine; and the
rush of the wind against the vehicle that
can make you sleepy. Don’t let it
happen
to you! If it does, your vehicle
can leave the road in less than a
second, and you could crash and be
injured.
What can you do about highway
hypnosis? First, be aware that it can
happen.
Then here
are some tips:
4 Make sure your vehicle is well
ventilated,
with a comfortably cool
interior.
Keep your eyes moving. Sca.n the road
ahead and
-to the sides. Check your
rearview mirrors frequently and your
instruments from time to time. This
can help you avoid
a fixed stare.
Wear good sunglasses in bright light.
Glare can cause drowsiness. But
don’t
wear sunglasses at night. They will.
drastically reduce-your,overall.~sion
at the very time you need all the.
seeing power
you have.
If you get sleepy, pull off the road into
a rest, service, &‘parking area and
take a nap, get so.me exercise, or both.
For safety, treat drowsiness on the
highway
as an emergency.
As in any driving situation, keep pace
with traffic and allow adequate
foIlowing distances.

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Substitute Oil (LTI Engine Only)
When adding .oil to maintain engine oil
level, if an oil meeting GM St.aidard
GM4718M is not available, you can use
oil designated either SAE 5W-30 API
Service SG at all temperatures, or SAE
1OW-30 API Service SC at temperatures
above
0°F (-18°C) : This oil should not
be used for an oil change.
Substitute. 01 (LTS Engine Only)
When adding oil to maintain engine oil
level,
if an oil meeting GM Standard
GM4718M is not available, you can use
oil designated. SAE 1OW-30 API Service
SG at all temperatures. This oil should
not be used for an oil change.
Engine 0il.Addifives
Don't add anything to your oil.>Your
Chemolet dealer is ready to
ad a ,'se if
you think something should be ,added. I
When to Change Engine Oil
See if my one of these is true !€or-you:
Most trips are less than 4 miles
(6 lm).
It's below freezing outside and most
trips are less than
10 miles (16 km) .
TEie engine is at low speed most of the
time
(as in stop-and-go traEc).
Most trips are through dusty places.
If any one of these is true for your
vehicle, you need to change
your oil
and filter every 3,000 miles
(5 000 km) or 3 months-whichever
comes first. (See
the Index under
Engine Oil Life Monitor.)
If none of them.is true, change the oil
every 7,500 miles (12 500 lun) or 12
months-whichever comes first.
Change the filter
at the first oil change
and
at every other oil change after that.
(See the Index under Engine Oil Life
Monitor.)

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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
z 'A
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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262
Rear Axle (CONT~)
What to Use:
To add lubricant when the level
use Me Lubricant (GM Part Na
12345977) or SAE BOW-90 GL-5
lubricant. To completely refill after
-draining, add four ounces (118 mQ af
Limited-Slip Dlfferential Lubricant
Additive (GM Part No. 1052358). Zmn
fill to the bottom of the filler plug hole
with Axle ‘Lubricant (GM Part No.
12345977) o,r SAE 8OW-90 GL-5 gear
lubricant.
Engine Coolant
e foUowing explains your cooling
sgstm and how to add coolant when it
is Im. If you have a problem with
e~@e overheating, see the Index under
Engine Ouerheating.
The proper coolant for your Corvette
* Give freezing protection down to
Give boiling protection up. to 262°F
Protect against rust and corrosion.
Help keep the proper engine
Let the warning lights work as they
-3m (-37°C).
(128°C) ~
temperature.
should.
What to Use:
Use a mixture of one-half clean wafer
(preferably distilled) and one-half
antifreeze that
meets “GM Specification
1825-M,” which won’t damage
aluminum parts. You can also use a
recycled coolant conforming to GM
Specification 1825-M with a complete
coolant
flush and refill. If you have the
LTl engine, use GM Engine Coolant
Supplement (sealer)
with any complete
coolant change.
If you use these, you
don’t need to add anything else.