CHEVROLET CORVETTE 1993 4.G Owners Manual

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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.
330

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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.
= 332

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w
c
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.
333 . .

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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

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CHECK-
I OR SERVICE
Parking Brake
and Automatic
Transmission P (Park)
Mechanism Check
Underbody
Flu&ing
WHAT TO DO
While parked, and with the parking brake set, try to mrn the key to Lack in each shift lever
position,
With an automatic transmission, the key should turn to Lock only when the shift.levex is.h
With a manual transmission, the key should turn to Lock only when the shift lever is in
On vehicles with a key release button, try to turn the key to Lock without pressing -the button.
.The key should:turn to Luck only with the key button depressed. On all vehicles, the key should
come out only .in Lack. :'a
. ~ -~
P (park).
R (Reverse).
~ ~~ ~
Park on a fairly steep hill, with the vehicle facing~downhill.- Keeping your foot on the r . cI dar
brake, set the parking .brake.
To check the. parking brake: With the- engine running and transmission .in N (Neutral), slowly
-remove foot pressure from the regular-brake pedal. Do this until the vehicleiis held by the
parking brake only.
To check the P. (Park) mechanism's holding ability: Shift to P (Park). Then release all brakes.
At least every spring use distilled water to flush any cortosive materials from the underbody.
Take care to
dean thoroughly any areas where mud.and other debris can collect.

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Section C: Periodic Maintenance Inspections
Listed below are inspections and services which should be performed at least twice a year (for instance, each spring and fall).
You should let your- GM dealer's service department or other qualified ssvj,cg [email protected] do these j-obs. Make sure any necessary
repairs are completed
at once.
INSPECTION
OR SERVICE
Steering and
Suspension Inspection
Tire and Wheel
Inspection
Exhaust System
Inspection
~-
Rear Axle Service
Brake System
Inspection
WHAT SHOULD BE DOME
Inspect. the front and rear susp-ension and steering system for damaged, loose or missing parts,
signs of wear, or lack of lubrication. Inspect the power steering lines and hoses. for proper
hookup,
bindmg-, leaks, cracks, chafing, etc.
Inspect the tires for uneven wear or damage. If there is irregular or premature wear, check the
wheel alignment. Inspect for damaged wheels.
Inspect the complete exhaust system. Inspect the
body neat the exhaust system. Look for broken,
damaged, missing or out-of-position parts as well as open seams, holes, loose connections, or
other conditions which could cause a heat buildup in the floor pan or could let exhaust fumes
into the- vehicle.
See the Index under Engine Exhaust.
Check:the gear lubricant leve1.h the rear axle and add if needed. See the Index: under Rear Axle.
A fluid loss in this system;may indicate a problem. Check the system and repair it if needed.
Inspect the complete system. Inspect brake lines and
hoses for proper hookup, binding, leaks,
cracks, chafing, etc. Inspect disc brake pads for wear and rotors for surface condition. Inspect
-other brake parts, .hcluding calipers, parking brake, etc. Check parking brake adju\
stment. You
may need
to have your brakes inspected more often if your driving habits or conditions result in
frequent braking.
NOTE:. A low brake fluid level can indicate worn disc brake pads which may need to be
serviced.
Also, if 'the brake system warning light stays on or comes on, something may be wrong
with .the brake system. See the Index under Brake System Warning Light. 'If your anti-lock brake
systemwarning light stays on, comes on or flashes, something may be wrong with the anti-lock
brake system. See the Index under Anti-Lock Brake System Warning Light.

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NOTE: Fluids and lubricants identified by name, partnumber or specification may be obtained from your GM dealer.
1 USAGE I FWID/WBRICANT 1

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Section D: Recommended Fluids .& Lubricants (Conr.>
USAGE
Key Lock Cylinders
Manual Transmission
shift Linkage
Aut~mtic Transmission
Shift Linkage
Clutch Linkage Pivot
Points
'Floor Shift Linkage
Chassis Lubrication
Windshield Washer
Solvent
m m . 338
FUJID/UIBRICANT
Lubricate with Multi-Purpose Lubricant (GM Part No. l2345120), synthetic ;sAE 5W-30. engine
oil.or silicone lubricant (GM PartNo. 105227": or 10522'77).
Chassis lubricant meeting requirements of.NLGI Grade 2,,category LB or GC-LB (or GM .Part
No. 1052@7).
Engine oil.
Engine oil.
Engine 03.
Chassis lubricant meeting requirements of KG1 Grade 2, Categury LB or GC-LB
(or GM Part No. 1052497).
AxleLubriCant (GM Part No. 12345477) or SAE. SOW-90 GL-5 Gear Lubricant,, and Limited-
Slip DBerential Lubricant. Additive (GM Part..NO. 105235,8) or .equivalent where .required. See
the lndar under Rear Axk.
GM Optikke@ Waher SQlvent [GM par?: No. .105l515) Qr equivglgpt-. ,- . -

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Hood Latch Assembly
a.
Pivots and Spring
b. Release Pawl
Anchor
FUJID/WBRICANT
a. Engine oil. 14
b. Chassis lubricant meeting requirements of 'NLGI Grade 2, Category LB or GC-LB
(or GM -Part No. 1052497).
Hood. and Door
.Hinges, Fuel Door
Compartment Lid
Hinges, Concealed
Headlight Hinges,
Hatch Hinges, Foldi
Front S-eats I
Hinge, Rear
Engine oil or Lubriplate Lubriic; 50109).
Weathersfiips Dielectric Silicone Grease (GM Part Na. 12345579) or equivalent.
I See the Index under Repkacement Parts for recommended replacement filters, valves and spark plugs.