transmission oil CHEVROLET CORVETTE 2021 User Guide

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
Vehicle Care 265
(1) Passenger (P-Metric) Tire:The
United States version of a metric tire
sizing system. The letter "P" as the first
character in the tire size means a
passenger vehicle tire engineered to
standards set by the U.S. Tire and Rim
Association.
(2) Tire Width
:The 3-digit number
indicates the tire section width in
millimeters from sidewall to sidewall.
(3) Aspect Ratio
:A 2-digit number that
indicates the tire height-to-width
measurements. For example, if the tire
size aspect ratio is 75, as shown in
item (3) of the illustration, it would
mean that the tire's sidewall is
75 percent as high as it is wide.
(4) Construction Code
:A letter code is
used to indicate the type of ply
construction in the tire. The letter "R"
means radial ply construction; the letter
"D" means diagonal or bias ply
construction.
(5) Rim Diameter
:Diameter of the
wheel in inches. (6) Service Description
:These
characters represent the load index and
speed rating of the tire. The load index
represents the load carrying capacity a
tire is certified to carry. The speed
rating is the maximum speed a tire is
certified to carry a load.
Tire Terminology and Definitions
Air Pressure:The amount of air inside
the tire pressing outward on each
square inch of the tire. Air pressure is
expressed in kPa (kilopascal) or psi
(pounds per square inch).
Accessory Weight
:The combined
weight of optional accessories. Some
examples of optional accessories are
automatic transmission, power
windows, power seats, and air
conditioning.
Aspect Ratio
:The relationship of a
tire's height to its width.
Belt
:A rubber coated layer of cords
between the plies and the tread. Cords
may be made from steel or other
reinforcing materials. Bead
:The tire bead contains steel
wires wrapped by steel cords that hold
the tire onto the rim.
Bias Ply Tire
:A pneumatic tire in which
the plies are laid at alternate angles
less than 90 degrees to the centerline
of the tread.
Cold Tire Pressure
:The amount of air
pressure in a tire, measured in kPa
(kilopascal) or psi (pounds per square
inch) before a tire has built up heat
from driving. See Tire Pressure0267.
Curb Weight
:The weight of a motor
vehicle with standard and optional
equipment including the maximum
capacity of fuel, oil, and coolant, but
without passengers and cargo.
DOT Markings
:A code molded into the
sidewall of a tire signifying that the tire
is in compliance with the U.S.
Department of Transportation (DOT)
Motor Vehicle Safety Standards. The
DOT code includes the Tire Identification
Number (TIN), an alphanumeric

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
Service and Maintenance 293
Because of the way people use vehicles,
maintenance needs vary. There may need to
be more frequent checks and services. The
Additional Required Services - Normal are for
vehicles that:
.Carry passengers and cargo within
recommended limits on the Tire and
Loading Information label. SeeVehicle
Load Limits 0189.
.Are driven on reasonable road surfaces
within legal driving limits.
.Use the recommended fuel. See
Recommended Fuel 0226.
Refer to the information in the Maintenance
Schedule Additional Required Services -
Normal chart.
The Additional Required Services - Severe are
for vehicles that are:
.Mainly driven in heavy city traffic in hot
weather.
.Mainly driven in hilly or mountainous
terrain.
.Used for high speed or competitive
driving.
.Used for taxi, police, or delivery service.
Refer to the information in the Maintenance
Schedule Additional Required Services -
Severe chart.
{Warning
Performing maintenance work can be
dangerous and can cause serious injury.
Perform maintenance work only if the
required information, proper tools, and
equipment are available. If they are not,
see your dealer to have a trained
technician do the work. See Doing Your
Own Service Work 0233.
Maintenance Schedule
Owner Checks and Services
Check the engine oil level. See Engine Oil
0 237.
Once a Month
.Check the tire inflation pressures. See Tire
Pressure 0267.
.Inspect the tires for wear. See Tire
Inspection 0272.
.Check the windshield washer fluid level.
See Washer Fluid 0249.
Engine Oil Change
When the CHANGE ENGINE OIL SOON
message displays, change the engine oil and
filter within the next 1 000 km (600 mi). If driven under the best conditions, the
engine oil life system may not indicate the
need for vehicle service for up to a year.
The engine oil and filter must be changed at
least once a year and the oil life system
must be reset. Your trained dealer technician
can perform this work. If the engine oil life
system is reset accidentally, service the
vehicle within 5 000 km (3,000 mi) since the
last service. Reset the oil life system when
the oil is changed. See
Engine Oil Life
System 0241.
Engine Air Filter Change
When the REPLACE AT NEXT OIL CHANGE
message displays, change the engine air
filter at the next engine oil change. When
the REPLACE ENGINE AIR FILTER SOON
message displays, the engine air filter
should be replaced at the earliest
convenience. Reset the engine air filter life
system after the engine air filter is replaced.
See Engine Air Filter Life System 0242.
Transmission Fluid Change
When the CHANGE TRANSMISSION FLUID
SOON message displays, change the fluid
and filter within the next 1 000 km (600 mi).
Failure to change the transmission fluid at
required intervals can lead to reduced

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294 Service and Maintenance
transmission performance. The transmission
fluid must be changed at least every three
years and the Fluid Life System must be
reset. Your dealer has trained service
technicians who will change the fluid and
reset the system. If the system is ever reset
accidentally, the fluid must be changed at
72 000 km (45,000 mi) since the last fluid
change. SeeDual Clutch Transmission Fluid
Life System 0242.
Air Conditioning Desiccant (Replace Every
Seven Years)
The air conditioning system requires
maintenance every seven years. This service
requires replacement of the desiccant to
help the longevity and efficient operation of
the air conditioning system. This service can
be complex. See your dealer.
Required Services Every 12 000 km
(7,500 mi)
.Check engine oil level and oil
life percentage. If needed, change engine
oil and filter, and reset oil life system.
See Engine Oil 0237 and
Engine Oil Life System 0241.
.Check the air filter life percentage.
If necessary, replace the engine air filter
and reset the engine air filter life system.
See Engine Air Filter Life System 0242.
.Check engine coolant level. See Cooling
System 0245.
.Check windshield washer fluid level. See
Washer Fluid 0249.
.Check tire inflation pressures. See Tire
Pressure 0267.
.Inspect tire wear. See Tire Inspection
0 272.
.Visually check for fluid leaks.
.Inspect brake system. See Exterior Care
0 283.
.Visually inspect steering, suspension, and
chassis components for damage, including
cracks or tears in the rubber boots, loose
or missing parts, or signs of wear at least
once a year. See Exterior Care0283.
.Inspect power steering for proper
attachment, connections, binding, leaks,
cracks, chafing, etc.
.Visually inspect halfshafts and driveshafts
for excessive wear, lubricant leaks, and/or
damage including: tube dents or cracks,
constant velocity joint or universal joint
looseness, cracked or missing boots, loose or missing boot clamps, center bearing
excessive looseness, loose or missing
fasteners, and axle seal leaks.
.Check restraint system components. See
Safety System Check
051.
.Visually inspect fuel system for damage
or leaks.
.Visually inspect exhaust system and
nearby heat shields for loose or damaged
parts.
.Lubricate body components. See Exterior
Care 0283.
.Check parking brake and dual clutch
transmission park mechanism. See Park
Brake and P (Park) Mechanism Check
0 252.
.Check accelerator pedal for damage, high
effort, or binding. Replace if needed.
.Visually inspect gas strut for signs of
wear, cracks, or other damage. Check the
hold open ability of the strut. If the hold
open is low, service the gas strut. See Gas
Strut(s) 0254.

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Service and Maintenance 295
Maintenance Schedule Additional
Required Services - Normal12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi 60 000 km/37,500 mi
72 000 km/45,000 mi84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi 120 000 km/75,000 mi 132 000 km/82,500 mi
144 000 km/90,000 mi 156 000 km/97,500 mi
168 000 km/105,000 mi 180 000 km/112,500 mi
192 000 km/120,000 mi 204 000 km/127,500 mi 216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Perform Required Services. Check engine oil level and oil
life percentage. Change engine oil and filter, if needed.
Check engine air filter life percentage and status. Change
engine air filter, if needed. (1)@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (2)@ @@@@@
Inspect evaporative control system. (3)@ @@
Check the dual clutch transmission fluid life percentage.
Change the fluid if needed. (4)@@@
Change the dual clutch transmission canister filter. (5)@ @@@@@@
Replace spark plugs. Inspect spark plug wires and/or boots.@
Drain and fill engine cooling system. (6)@
Visually inspect accessory drive belts. (7)@
Replace brake fluid. (8)
Replace front lift system fluid. (9)
Replace windshield wiper blades. (10)
@ @ @ @ @ @ @ @ @ @
Replace hatch/trunk support gas struts. (11)@ @
Replace air conditioning desiccant. (12)

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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296 Service and Maintenance
Footnotes—Maintenance Schedule
Additional Required Services - Normal
(1) Or every four years, whichever comes
first. If driving in dusty conditions, inspect
the filter at each oil change or more often
as needed. See Engine Air Cleaner/Filter
0 243.
(2) Or every two years, whichever comes
first. More frequent passenger compartment
air filter replacement may be needed if
driving in areas with heavy traffic, poor air
quality, high dust levels, or environmental
allergens. Passenger compartment air filter
replacement may also be needed if there is
reduced airflow, window fogging, or odors.
Your GM dealer can help determine when to
replace the filter.
(3) Visually check all fuel and vapor lines
and hoses for proper attachment,
connection, routing, and condition. (4)
Or every three years, whichever comes
first. If the vehicle mileage is near the
canister filter replacement interval, replace
the fluid and filter. More frequent fluid and
filter replacement may be needed if the
vehicle is competitively or aggressively
driven. This service can be complex. See
your dealer.
(5) Check the transmission fluid
life percentage. If the percentage is less
than 10%, replace the fluid and filter. The
initial transmission canister filter change
must be performed at 12 000 km (7,500 mi),
and every 36 000 km (22,500 mi) thereafter.
This service can be complex. See your
dealer.
(6) Or every five years, whichever comes
first. See Cooling System 0245. (7)
Or every 10 years, whichever comes first.
Inspect for fraying, excessive cracking,
or damage; replace, if needed.
(8) Replace brake fluid every five years. See
Brake Fluid 0251.
(9) Replace front lift system fluid every five
years. See Recommended Fluids and
Lubricants 0301
(10) Or every 12 months, whichever comes
first. See Wiper Blade Replacement 0253.
(11) Or every 10 years, whichever comes
first. See Gas Strut(s) 0254.
(12) Replace air conditioning desiccant every
seven years.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Service and Maintenance 297
Maintenance Schedule Additional
Required Services - Severe12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi 60 000 km/37,500 mi
72 000 km/45,000 mi84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi 120 000 km/75,000 mi 132 000 km/82,500 mi
144 000 km/90,000 mi 156 000 km/97,500 mi
168 000 km/105,000 mi 180 000 km/112,500 mi
192 000 km/120,000 mi 204 000 km/127,500 mi 216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Perform Required Services. Check engine oil level and oil
life percentage. Change engine oil and filter, if needed.
Check engine air filter life percentage and status. Change
engine air filter, if needed. (1)@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (2)@ @@@@@
Inspect evaporative control system. (3)@ @@
Check the dual clutch transmission fluid life percentage.
Change the fluid if needed. (4)@@@
Change the dual clutch transmission canister filter. (5)@ @@@@@@
Replace spark plugs. Inspect spark plug wires and/or boots.@
Drain and fill engine cooling system. (6)@
Visually inspect accessory drive belts. (7)@
Replace brake fluid. (8)
Replace front lift system fluid. (9)
Replace windshield wiper blades. (10)
@ @ @ @ @ @ @ @ @ @
Replace hatch/trunk support gas struts. (11)@ @
Replace air conditioning desiccant. (12)

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298 Service and Maintenance
Footnotes—Maintenance Schedule
Additional Required Services - Severe
(1) Or every four years, whichever comes
first. If driving in dusty conditions, inspect
the filter at each oil change or more often
as needed. See Engine Air Cleaner/Filter
0 243.
(2) Or every two years, whichever comes
first. More frequent passenger compartment
air filter replacement may be needed if
driving in areas with heavy traffic, poor air
quality, high dust levels, or environmental
allergens. Passenger compartment air filter
replacement may also be needed if there is
reduced airflow, window fogging, or odors.
Your GM dealer can help determine when to
replace the filter.
(3) Visually check all fuel and vapor lines
and hoses for proper attachment,
connection, routing, and condition.
(4) Or every three years, whichever comes
first. If the vehicle mileage is near the
canister filter replacement interval, replace
the fluid and filter. More frequent fluid and
filter replacement may be needed if the
vehicle is competitively or aggressively
driven. This service can be complex. See
your dealer. (5)
Check the transmission fluid
life percentage. If the percentage is less
than 10%, replace the fluid and filter. The
initial transmission canister filter change
must be performed at 12 000 km (7,500 mi),
and every 36 000 km (22,500 mi) thereafter.
This service can be complex. See your
dealer.
(6) Or every five years, whichever comes
first. See Cooling System 0245.
(7) Or every 10 years, whichever comes first.
Inspect for fraying, excessive cracking,
or damage; replace, if needed.
(8) Replace brake fluid every five years. See
Brake Fluid 0251.
(9) Replace front lift system fluid every five
years. See Recommended Fluids and
Lubricants 0301
(10) Or every 12 months, whichever comes
first. See Wiper Blade Replacement 0253.
(11) Or every 10 years, whichever comes
first. See Gas Strut(s) 0254.
(12) Replace air conditioning desiccant every
seven years.Special Application Services
.Severe Commercial Use Vehicles Only:
Lubricate chassis components every oil
change.
.Have underbody flushing service
performed. See "Underbody Maintenance"
in Exterior Care 0283.
Additional Maintenance
and Care
Your vehicle is an important investment and
caring for it properly may help to avoid
future costly repairs. To maintain vehicle
performance, additional maintenance
services may be required.
It is recommended that your dealer perform
these services —their trained dealer
technicians know your vehicle best. Your
dealer can also perform a thorough
assessment with a multi-point inspection to
recommend when your vehicle may need
attention.
The following list is intended to explain the
services and conditions to look for that may
indicate services are required.

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Service and Maintenance 301
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
Fluids and lubricants identified below by name or specification, including fluids or lubricants not listed here, can be obtained from your dealer.Usage Fluid/Lubricant
Chassis Lubrication Chassis lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Dual Clutch Transmission See your dealer. Engine Coolant 40/60 coolant/water mixture of clean, drinkable water and use only DEX-COOL Coolant. See Cooling System0245.
Engine Oil Engine oil meeting the dexos2 specification of the proper SAE viscosity grade. Mobil 1 dexos2 full synthetic is recommended. See Engine Oil0237.
Front Lift System (If Equipped) GM Approved DOT 4 Hydraulic Brake Fluid. See Front Lift System0214.
Hydraulic Brake System GM Approved DOT 4 Hydraulic Brake Fluid. Windshield Washer Automotive windshield washer fluid that meets regional freeze protection requirements.

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302 Service and Maintenance
Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can be obtained from your dealer.Part GM Part NumberACDelco Part Number
Engine Air Cleaner/Filter 84378662A3249C
Engine Oil Filter 12696048PF64
Passenger Compartment Air Filter Element 13508023CF185
Spark Plug 1262244241-149
External Transmission Filter Kit 24299326—
Wiper Blades
IDriver Side –600 mm (23.6 in) 84566977
—
IPassenger Side –525 mm (20.7 in) 84566978
—

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
330 Index
Electrical System (cont'd)Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Rear Compartment Fuse Block . . . . . . . . . 258
Electronic Stability Control (ESC) Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . 243
Check Light (Malfunction Indicator) . . . . . 86
Compartment Overview . . . . . . . . . . . . . . . . 235
Coolant Temperature Gauge . . . . . . . . . . . . 84
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 245
Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . 307
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . 241
Oil Pressure Light . . . . . . . . . . . . . . . . . . . . . . . 91
Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Power Messages . . . . . . . . . . . . . . . . . . . . . . . . 98
Running While Parked . . . . . . . . . . . . . . . . . 198
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Engine Air Filter Life System . . . . . . . . . . . . . 242
Engine Compartment Lamp . . . . . . . . . . . . . . 109
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Event Data Recorders . . . . . . . . . . . . . . . . . . . . .318
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Extended Parking . . . . . . . . . . . . . . . . . . . . . . . . 197
Extender, Seat Belt . . . . . . . . . . . . . . . . . . . . . . . . 51 Exterior Lamp Controls . . . . . . . . . . . . . . . . . . . 106
Exterior Lamps Off Reminder . . . . . . . . . . . . 106
Exterior Lighting Battery Saver . . . . . . . . . . .110
F
Filter,
Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . 243
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Flashers, Hazard Warning . . . . . . . . . . . . . . . . 108
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
Fluid Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Dual Clutch Transmission . . . . . . . . . . . . . . 241
Dual Clutch Transmission LifeSystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Front Air Dam . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Front Lift System . . . . . . . . . . . . . . . . . . . . . . . . .214
Front Lift System Light . . . . . . . . . . . . . . . . . . . 88
Front Seats
Heated and Ventilated . . . . . . . . . . . . . . . . . . 44
Front Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Fuel
Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 Fuel (cont'd)
Economy, Driving for Better . . . . . . . . . . . . 177
Filling a Portable Fuel Container . . . . . . . 228
Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . 227
Foreign Countries . . . . . . . . . . . . . . . . . . . . . . 227
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Management, Active . . . . . . . . . . . . . . . . . . . 197
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . . . . 226
Recommended . . . . . . . . . . . . . . . . . . . . . . . . . 226
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Fuses Fuses and Circuit Breakers . . . . . . . . . . . . . 255
Instrument Panel Fuse Block . . . . . . . . . . . 256
Rear Compartment Fuse Block . . . . . . . . . 258
G
Garage Door Opener . . . . . . . . . . . . . . . . . . . . . 102
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Gauges Engine Coolant Temperature . . . . . . . . . . . . 84
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Transmission Temperature . . . . . . . . . . . . . . 84
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Warning Lights and Indicators . . . . . . . . . . 79