2021 CHEVROLET CORVETTE fuel additives

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
176 Driving and Operating
Driving and Operating
Driving Information
Driving for Better Fuel Economy . . . . . . . 177
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . 177
Defensive Driving . . . . . . . . . . . . . . . . . . . . . . 178
Impaired Driving . . . . . . . . . . . . . . . . . . . . . . . 178
Control of a Vehicle . . . . . . . . . . . . . . . . . . . 178
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 179
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 180
Track Events and Competitive Driving(Z51 Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Driving on Wet Roads . . . . . . . . . . . . . . . . . 186
Hill and Mountain Roads . . . . . . . . . . . . . . 187
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . 188
If the Vehicle Is Stuck . . . . . . . . . . . . . . . . . 189
Vehicle Load Limits . . . . . . . . . . . . . . . . . . . . 189
Starting and Operating
New Vehicle Break-In . . . . . . . . . . . . . . . . . . 192
Front Air Dam (and Splitter) . . . . . . . . . . . 192
Composite Materials . . . . . . . . . . . . . . . . . . . 192
Ignition Positions . . . . . . . . . . . . . . . . . . . . . . 193
Starting the Engine . . . . . . . . . . . . . . . . . . . . 194
Retained Accessory Power (RAP) . . . . . . . 195
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . 196
Shifting out of Park . . . . . . . . . . . . . . . . . . . 196
Parking over Things That Burn . . . . . . . . . 197 Active Fuel Management . . . . . . . . . . . . . . 197
Extended Parking . . . . . . . . . . . . . . . . . . . . . . 197
Engine Exhaust
Engine Exhaust . . . . . . . . . . . . . . . . . . . . . . . . 197
Running the Vehicle While Parked . . . . . 198
Dual Clutch Transmission
Dual Clutch Transmission . . . . . . . . . . . . . . 198
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . 201
Brakes
Electric Brake Boost . . . . . . . . . . . . . . . . . . . 204
Antilock Brake System (ABS) . . . . . . . . . . 204
Electric Parking Brake . . . . . . . . . . . . . . . . . 205
Brake Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Hill Start Assist (HSA) . . . . . . . . . . . . . . . . . 206
Ride Control Systems
Traction Control/Electronic Stability
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Hill Rollback Control . . . . . . . . . . . . . . . . . . . 208
Driver Mode Control . . . . . . . . . . . . . . . . . . 208
Front Lift System . . . . . . . . . . . . . . . . . . . . . . 214
Competitive Driving Mode . . . . . . . . . . . . . 215
Limited-Slip Differential (Without Z51) . . . . . . . . . . . . . . . . . . . . . . . . 218
Limited-Slip Differential (With Z51) . . . . . 218
Cruise Control
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . 218
Driver Assistance Systems
Driver Assistance Systems . . . . . . . . . . . . . 220
Assistance Systems for Parking or Backing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Side Blind Zone Alert (SBZA) . . . . . . . . . . . 224
Fuel
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Recommended Fuel . . . . . . . . . . . . . . . . . . . . 226
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . . . . 226
Fuels in Foreign Countries . . . . . . . . . . . . . 227
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . 227
Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . 227
Filling a Portable Fuel Container . . . . . . . 228
Trailer Towing
General Towing Information . . . . . . . . . . . 229
Conversions and Add-Ons
Add-On Electrical Equipment . . . . . . . . . . . 229

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
Driving and Operating 181
{Warning
Some of the adjustments and procedures
specified in this section may require
specialized skill, training, and equipment.
Failure to perform these procedures
properly could cause malfunction,
potentially resulting in death, personal
injury, or damage to the vehicle or
property. Do not attempt to perform
these adjustments or procedures unless
properly qualified.
Be sure to follow all service procedures
before driving the vehicle at track events or
competitively.
{Warning
Prior to each track event and again
before returning to public roads, tighten
the wheel nuts with a torque wrench to
the proper torque specification. Wheel
nuts that are improperly or incorrectly
tightened can cause the wheels to
become loose or come off, resulting in a
crash. See Capacities and Specifications
0 305 for wheel nut torque specifications. If equipped, the front license plate bracket
should be removed and replaced with the
aero cover for track use.
Engine Sound Management Setting
Caution
Do not place the vehicle in Engine Sound
Management–Stealth mode. Damage
could result to exhaust valve actuators.
Engine Oil
Caution
If the vehicle is used for track events and
competitive driving, the engine may use
more oil than it would with normal use.
Low oil levels can damage the engine.
Check the oil level often and maintain
the proper level. See Engine Oil0237.
Check the oil level often during track events
and competitive driving. See “Checking the
Engine Oil" in Engine Oil0237.
Engine Cooling
If reduced performance is experienced during
track events or competitive driving, turning
off the A/C will help to improve engine
performance. Maintain a mixture of 40% DEX-COOL
coolant and 60% clean, drinkable water to
optimize engine performance.
Fuel
Unleaded gasoline, rated at 93 octane or
higher, is required.
Caution
Some high octane fuels contain additives
and compounds that may damage the
vehicle and void the vehicle warranty. See
Prohibited Fuels
0226.
Dual Clutch Transmission Fluid
The transmission fluid and external filter
should be changed after every 24 hours of
track usage. If prompted by the transmission
fluid life monitor that remaining fluid life is
low, the fluid and external filter should be
changed as soon as possible.
Add an additional 2 L (2 qt) of DCT
transmission fluid prior to track usage. It is
not required to remove the additional 2 L
(2 qt) of DCT fluid.
Any transmission level set or change should
be performed at your dealer.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
Driving and Operating 227
Caution (Continued)
.Fuel containing metals such as
methylcyclopentadienyl manganese
tricarbonyl (MMT), which can damage
the emissions control system and
spark plugs.
.Fuel with a posted octane rating of
less than the recommended fuel. Using
this fuel will lower fuel economy and
performance, and may decrease the
life of the emissions catalyst.
Fuels in Foreign Countries
The U.S., Canada, and Mexico post fuel
octane ratings in anti-knock index (AKI). For
fuel not to use in a foreign country, see
Prohibited Fuels0226.
Fuel Additives
TOP TIER Detergent Gasoline is highly
recommended for use with your vehicle.
If your country does not have TOP TIER
Detergent Gasoline, add ACDelco Fuel
System Treatment Plus−Gasoline to the
vehicle’s gasoline fuel tank at every oil
change or 15 000 km (9,000 mi), whichever
occurs first. TOP TIER Detergent Gasoline and
ACDelco Fuel System Treatment Plus −Gasoline will help keep your vehicle’s
engine fuel deposit free and performing
optimally.
Filling the Tank
An arrow on the fuel gauge indicates which
side of the vehicle the fuel door is on. See
Fuel Gauge
083.
{Warning
Fuel vapors and fuel fires burn violently
and can cause injury or death.
Follow these guidelines to help avoid
injuries to you and others:
.Read and follow all the instructions on
the fuel pump island.
.Turn off the engine when refueling.
.Keep sparks, flames, and smoking
materials away from fuel.
.Do not leave the fuel pump
unattended.
.Avoid using electronic devices while
refueling.
.Do not re-enter the vehicle while
pumping fuel.
(Continued)
Warning (Continued)
.Keep children away from the fuel
pump and never let children
pump fuel.
.Before touching the fill nozzle, touch a
metallic object to discharge static
electricity from your body.
.Fuel can spray out if the fill nozzle is
inserted too quickly. This spray can
happen if the tank is nearly full, and is
more likely in hot weather. Insert the
fill nozzle slowly and wait for any hiss
noise to stop before beginning to
flow fuel.
The fuel door unlocks when the vehicle
doors are unlocked. See Remote Keyless
Entry (RKE) System Operation 07.

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