service CHEVROLET CORVETTE 1993 4.G Manual Online

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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.

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Section A: Scheduled Maintenance Services
Selecting the. RjgM Schedule
First you'll need to decide which of the two. s-chedules is
.right for your vehiJe. Here's how to decide which schedule
to follow:
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Section A: Scheduled Maintenance Sewices (cont.1
Schedule I
Follow Schedule I if your vehick is
MAINLY driven under one or more of
the following conditions:
-* When most trips are less than 4 miles
When most trips are less than 10
(6 h).
miles (16 km) and outside
temperatures remain below -freezing.
When most trips indude extended
idling and/or frequent low-speed
operation, as in stop-and-go trafiic.
When operating in dusty areas.
Schedule I should also be fallowed if
the vehicle is used for delivery service,
police, taxi or other comercid
applications.
An Emission Control Service.
The
US. Environmental Protection
Agency has determined that the failure to
perforpn this maintenance item wiE mi
nullify the emission warranty or limit
recall liability prior to the compl&km of
vehicle useful life. General Motors,
however, urges that all TecommM
maintenance services be performed at thz
indicated intervals and the rnaintmnce
be recorded in Section E: Maintenance
Recurd.
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Maintenance Schedule
Section A: Scheduled Maintenance Services (Cant.)
Schedule II
Foilow Schedule 11 ONLY i€ none .of
the driving conditions specified in
Schedule 1 apply.
* An Emission Control Service.
* me- US. Environmental Protection
Agency has determined that the failare to
perform thismaintenance item will not
nullify the emission wawanty or limit
recall liability
prior to the compktion 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: Maintmance
Record.
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Downloaded from www.Manualslib.com manuals search engine Theservices shown in this schedule up to 45,000 miles (75 OOO km) '.are to be
performed after 45,000 des at the same intervals.
MILES (000)
KILOMETERS (000) I
x5 I 15 I 22.5 I 30 I 37.5 I 45
I 0 I *-

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Section A: Scheduled Maintenance Services (cant.)
€xplanation of Scheduled Maintenance Services
Below are explanations of the services listedh Schedule I
and Schedule 11.
ITEM
NO. SERVICE
1 Engine OiI and Filter .Change*-Use -only API
Service SG Energy Conserving II oils of the proper
viscpsity.
To determine the preferred viscosity for
your vehicle'-s engine, see the Index under Engine
Oil. The engine requires a special oil rneethg-GM
Standard GM4718M. Oils meeting-this Standard
may be identgied. as synthetic, and should also be
ifientified as APT .Sc?rvice SG. However, not all
Synthetic
API Service SG oils will meet this GM
Standard. You should look for and use only an.oi1.
that. meets GM, Standard GM47-18M.
Your- vehicle has an Engine Oil Life Monitor. This
monitor will show you when to change the oil. See
the Index under Engine Oil Life Monitor.
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.
ITEM
NO.
2
3
SERVICE
Chassis Lubrication-Lubricate- the transmission
shift
.linkage, parkhg brake cable guides,
underbody contact points and linkage. Lubricate
the front sus.pension.
Engine
A~ctxsory Drive Beit In'spectim-.Inspect
the bekfor-cixxlcs, fraying, wear and proper
tension. Replace as -needed.
.. -NOTE: .To determine your engine's dispta6mmt and code, see the Index under Eagine Identification.
* An Emission Cpntrol Service.
-i? The US. Environmental ProteGtion Agency has. &ermined that the. failure to perform this maintenance item will not nullify the ewsii;sion
warranty
or limit recallliabilfty priorto ;he completion .of vehicle useful life. Geizel-a1 Motors, however, urgs that a12 recmimended
mairztenanceseruices
be:performed at the indicated intervals and the-maintenance be recorded in Section E: Maintenance Record.
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6 Transmissi-on Servic.e-For.a manual transmission,
the fluid doesnY req.uire changing.
ITEM
NO. SERVICE
For an automatic transmission, change koth the
fluid and f&r every 15,000 miles (25 000 lun) if
the vehicle is mainly dr-iven under .one ox more of,
these conditions:
In heavy city traffic where the outside
temperature regularly reaches 9OoF (32°C) or
higher..
9 In. hilly .or mguntain.ous te.min.
Uses such ,asTound in taxi, police ~ar or delivery
If you do not use your vehicle under- any of these
conditions, change both the fluid and fiiter every
100,000 miles (160 000 lan).
‘6 Spark Plug RepIacement’e-Replaee zpaik plugs
with the proper type. See the Index under
Replacem~ent Parts;
burns, cracks or Other damage. Check the boot fit
at. the coils .and at the spark plugs.. Redtice wires
as needed.
service.
7 Spark Plug Wire Inspection*B-Inspect for

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Section A: Scheduled Maintenance Sewices (cant.)
ITEM
NO.
.8
SERVICE
Air Cleaner Filter Replacement*-Replace every
30,000-miles (50 000 km) or more often under
dusty conditions. Ask your dealer for the proper
replacement intervals for your driving conditions.
ITEM
NO. SERVICE
9 Fuel Tank, Cap and Lines Inspection*+inspect
the- fuel tank, cap and lines (including fuel rails
and injection assembly) for damage or leaks.
Inspect fuel cap gasket for 'm even filler ,neck.
imprint oi: any damage.. Replace parts as needed.
Perio-dic replacement of the .fuel filter is not
required.
. * An Emission Control Si?rvi&.
b The U.S. Environmental Protection Agency has determined that the failure to perform this maintenance item will not nullify tho emission
wmlranty or .limit recall liability prior ta the completion of vehicle useful life. General Motors, however, urges that all recommended
maintenance services
be perJomzed at the indicatedtntmals.a.nd the.maintenance be. recorded in Sectioit E: Maintenance Reccyd.
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Section B: Owner Checks & Servrces
Listed below are owner checks and s&vice:s which should be
performed at the intervals specified to help ensure th-e
safety, dependability and emission control performance of
your vehicle.
Be sure any r~ecessary repairs .are completdat once,
Whenever any fluids or lubricants-are added to your vehicle,
make
sure they are the proper ones, -as shown in Section D.
CHECK
OR SERVICE _. -
Engine Oil Level
Engine
Coolant Level
Windshield WashGl
Fluid .Level
WHAT .TO. DO *
Check the engine oil level and add the proper oil if necess-ary. If you have a ZR-1 you-should
check your engine oil when the engine is cold. See the Indecx under Engine OiG for Mer details.
Check the engine. coolant level in the coolant recovery tank and add the proper coalant mix if
necessary. See the Index under Coolant for further details.
Check the windshield washer flui.d level in the windshield washer’ tank and add the proper fluid
if necessary. See the Ida under W7ndshieZd Wusher.nuid for further details.
At Least Once a Month
CHECK WHAT TO DO 0R.SERVICE
Tire Inflation Check tire inflation. Make sure they are inflated to the pressures specified on the Tire-Loading
Information label. located on the rear edge of the driver’s door. See the Index under Eres for
further details.
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Section 6: Owner Checks & Services (Cant.)
CHECK
OR .SERVICE
Key Lock Cylinders
Body Lubrication
WHAT TO DO
Lubricate the key lock cylinders with the lubricant specified ii.1 Section D.
Lubricate all body door hinges. Also lubricate all hinges and latches, .including those for the
hood, rear compartment, glove. box dool; console door and any folding- seat hardware. Section D
tells you what to use.
I. Before you start, be sure you have enough room around the vehicle.
2. Firmly apply both the parking brake (see the Index under Parking Brake if necessary) md the
regular brake.
NOTE: Do not use the accelerator pedal, and be -ready to turn off the engine immediately if -it
Starts.
work only in P (Park) or N (Neutral). If the starter works in any other positbn, your vehicle
needs service.
On manual transmission vehicles, put the shift lever in N (Neutral], push the clutch down
halfway,
and try to start the engine. The starter should work only when the c1.utch.i~ pushed
down d the way to the floor. If the .starter works when the clutch isn't pushed all the way
down, your vehicle needs service.
3. On aummtic transmission vehicles, try to start the engine in ea& gi%i&. The startejc should