2010 CHEVROLET CORVETTE coolant temperature

If the oil temperature is low, the display will show OIL
TEMPERATURE LOW. If the oil temperature is high, the
display will show OIL TEMPERATURE HIGH.
Coolant Temperature : This display shows the engine
coolant temperature.
Press the gauges button again to display the coolant
temperature, such as:
.COOLANT TEMPERATURE 51°C or
.COOLANT TEMPERATURE 123°F
If the coolant temperature is low, the display will show
COOLANT TEMPERATURE LOW. If the coolant
temperature is high, the display will show COOLANT
TEMPERATURE HIGH.
Transmission Fluid Temperature : If you have an
automatic transmission vehicle, this display shows the
automatic transmission fluid temperature.
Press the gauges button again to display the automatic
transmission fluid temperature, such as:
.TRANS FLUID TEMP 51°C or
.TRANS FLUID TEMP 123°F If the transmission fluid temperature is low, the
display will show TRANS FLUID TEMP LOW. If the
transmission fluid temperature is high, the display
will show TRANS FLUID TEMP HIGH.
Battery Voltage :
This display shows the current
battery voltage.
Press the gauges button again to display the battery
voltage, such as:
.BATTERY VOLTAGE 13.5 VOLTS
Tire Pressure : This display shows the tire pressure for
each tire.
Press the gauges button again to display the tire
pressure for the front tires, such as:
.FRONT TIRE PRESSURES L 234 kPa
R 228 kPa or
.FRONT TIRE PRESSURES L 34 PSI R 33 PSI
Press the gauges button again to display the tire
pressure for the rear tires, such as:
.REAR TIRE PRESSURES L 234 kPa R 228 kPa or
.REAR TIRE PRESSURES L 34 PSI R 33 PSI
4-50

COOLANT OVER TEMPERATURE
This message displays and a sound will be heard if the
engine coolant exceeds 124°C (255°F). If you have
been operating the vehicle under normal driving
conditions, pull off the road, stop the vehicle, and
turn off the engine as soon as possible.
You can monitor the coolant temperature with the
gauges button on the DIC or the engine coolant
temperature gauge on the instrument panel cluster.
See Engine Overheating
on page 6‑38,DIC Operation
and Displayson page 4‑47, and Engine Coolant
Temperature Gauge on page 4‑40.
To acknowledge the message, press the RESET button.
The message and sound will come back on until this
condition changes. If you do not press the RESET
button, the message remains on until the condition
changes.
CRUISE DISENGAGED
This message displays briefly when you disengage
the cruise control system by stepping on the brake on
an automatic transmission vehicle or the clutch on a
manual transmission vehicle, or by turning off the cruise
control switch. See Cruise Control
on page 4‑7for
more information.
ENGINE DRAG CONTROL ACTIVE
This message displays when engine drag control is
active. When driving in a lower gear in rainy, snowy,
or icy conditions and then letting up on the accelerator
or downshifting, the rear wheels may begin to slip and
this message displays. This message stays on for a few
seconds following the engine drag control event.
ENGINE OVERHEATED –STOP ENGINE
This message displays and a sound will be heard when
the engine has overheated. Stop and turn the engine
off immediately to avoid severe engine damage.
See Engine Overheating on page 6‑38.
ENGINE PROTECTION REDUCE
ENGINE RPM
This message displays if the engine oil temperature
exceeds 160°C (320°F). Check the engine coolant
temperature and engine oil level. If the engine is
too hot, see Engine Overheating
on page 6‑38.
The vehicle may need service, so see your dealer/
retailer.
You can monitor the oil temperature with the gauges
button on the DIC. See DIC Operation and Displays
on
page 4‑47.
4-56

Multiple chimes sound when this message is displayed.
This message remains displayed and active until the
issue is resolved.
HEADLAMPS SUGGESTED
This message displays if it is dark enough outside and
the headlamps and the Twilight Sentinel®controls are
off. This message informs the driver that turning on the
exterior lamps is recommended. It has become dark
enough outside to require the headlamps and/or other
exterior lamps.
HIGH TIRE PRESSURE
This message may be displayed when one or more of
the tires is over-inflated. This message also displays
LEFT FRONT, RIGHT FRONT, LEFT REAR, or
RIGHT REAR to indicate which tire is affected.
You can receive more than one tire pressure message
at a time. To read other messages that may have been
sent at the same time, press the RESET button . If a tire
pressure message appears on the DIC, stop as soon as
you can. Have the tire pressures checked and set to
those shown on the Tire Loading Information label. See
Run-Flat Tires
on page 6‑69, Loading the Vehicleon
page 5‑28, Inflation - Tire Pressureon page 6‑70, and
Tire Pressure Monitor Systemon page 6‑72. The DIC
also shows the tire pressure values. See DIC Operation
and Displays
on page 4‑47. To acknowledge the message, press the RESET button.
A message reappears every 10 minutes until the
condition is corrected.
HOT ENGINE AIR CONDITIONING OFF
This message displays when the engine coolant
becomes hotter than the normal operating temperature.
To avoid added strain on a hot engine, the air
conditioning compressor is automatically turned off.
When the coolant temperature returns to normal,
the A/C operation automatically resumes. You can
continue to drive the vehicle. If this message continues
to appear, have the system repaired by your dealer/
retailer as soon as possible to avoid compressor
damage.
ICE POSSIBLE
This message displays when the outside air
temperature is cold enough to create icy road
conditions. Adjust your driving accordingly.
LOW FUEL
This message displays when the fuel tank is less than
10 percent full and the display is turned off. A sound
will be heard when this message is displayed. Refill the
fuel tank as soon as possible. See
Fuel Gauge
on
page 4‑46.
4-57

PERF TRAC 5–RACE ACTIVE
HANDLING OFF
This message displays and a sound will be heard
when this Performance Traction Management mode
is selected. The instrument panel cluster light will also
be on when this mode is selected. Launch Control is
available when this mode selected. In this mode the
Traction Control is available but intended for use on dry
race track conditions. The Active Handling System is
disabled when this mode is selected. This mode will
require more driver skill than modes 1-4. Adjust your
driving accordingly. This system is available only on
ZR1 models. See “Performance Traction Management”
and “Launch Control” underCompetitive Driving Mode
on page 5‑9andRacing or Other Competitive Drivingon page 5‑19for more information about the use of
this mode.
PRESS BRAKE TO START ENGINE
(Automatic Transmission Only)
This message displays if you try to start the engine by
pressing the keyless ignition start button without having
the brake pressed. The brake needs to be pressed
when starting the engine. See Ignition Positions
on
page 3‑23for more information.
REDUCED ENGINE POWER
If this message displays and the check engine light
comes on, a noticeable reduction in the vehicle's
performance may occur. If the REDUCED ENGINE
POWER message is displayed, but there is no
reduction in performance, proceed to your destination.
The performance may be reduced the next time the
vehicle is driven.
The vehicle may be driven at a reduced speed while the
REDUCED ENGINE POWER message is displayed, but
acceleration and speed may be reduced. Anytime the
check engine light stays on, the vehicle should be taken
to your dealer/retailer as soon as possible for diagnosis
and repair. See Malfunction Indicator Lamp
on
page 4‑41for more information.
Multiple chimes sound when this message is displayed.
To acknowledge the message, press the RESET button.
The message reappears every five minutes until this
condition changes.
If the REDUCED ENGINE POWER message is
displayed in combination with the COOLANT OVER
TEMPERATURE message, see Engine Overheating
on
page 6‑38.
4-62

TRANSMISSION HOT IDLE ENGINE
This message displays and four chimes sound if the
transmission fluid temperature rises above 132°C
(270°F) or rises rapidly. The transmission may shift
gears or apply the torque converter clutch to reduce the
fluid temperature. Driving aggressively or driving on
long hills can cause the transmission fluid temperature
to be higher than normal. If this message appears, you
may continue to drive at a slower speed. Monitor the
transmission fluid temperature and allow it to cool to at
least 110°C (230°F). The transmission fluid temperature
can be monitored with the gauges button on the DIC.
See DIC Operation and Displays
on page 4‑47and
Automatic Transmission Fluidon page 6‑31. Also
check the engine coolant temperature. If it is also hot,
see Engine Overheating on page 6‑38.
If this message is displayed during normal vehicle
operation on flat roads, the vehicle may need service.
See your dealer/retailer for an inspection.
If driving in a performance or competitive manner, the
use of (S) Sport Automatic Mode or (S) Sport Manual
Paddle Shift gear selection is recommended. See
Automatic Transmission Operation
on page 3‑26for
more information. To acknowledge the message, press the RESET button.
The message reappears every 10 minutes until this
condition changes. If you do not press the RESET
button, the message remains on the display until the
condition changes.
TURN SIGNAL ON
This message displays and a sound will be heard if a
turn signal is left on for 1.2 km (three-quarters of a mile).
Move the turn signal/multifunction lever to the off
position.
To acknowledge this message, press the RESET
button.
UNLATCH HEADER TO MOVE TOP
This message displays and a sound will be heard if you
try to lower the convertible top without first unlocking
the top. Move the latch handle to unlock the convertible
top. See
Convertible Top (Manual)
on page 3‑59or
Convertible Top (Power) on page 3‑66.
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When to Check and What to Use
The hydraulic clutch fluid
reservoir cap has this
symbol on it. See Engine
Compartment Overview
on page 6‑14for
reservoir location.
Refer to the Maintenance Schedule for the proper
fluid to use. See Recommended Fluids and Lubricants
on page 7‑10. The fluid requires changing every
two years. See Scheduled Maintenance on page 7‑3.
How to Check and Add Fluid
Visually check the clutch fluid reservoir to make sure
the fluid level is at the MIN (minimum) line on the side
of the reservoir. The hydraulic clutch fluid system
should be closed and sealed.
Do not remove the cap to check the fluid level or to
top‐off the fluid level. Remove the cap only when
necessary to add the proper fluid until the level
reaches the MIN line.
Cooling System (Engine)
The cooling system allows the engine to maintain the
correct working temperature.
7.0L Engine shown, 6.2L Engine similar
A. Electric Engine Cooling Fan
B. Coolant Surge Tank with Pressure Cap
6-32

What to Use
{WARNING:
Adding only plain water to the cooling system
can be dangerous. Plain water, or some other
liquid such as alcohol, can boil before the proper
coolant mixture will. The vehicle's coolant warning
system is set for the proper coolant mixture.
With plain water or the wrong mixture, the engine
could get too hot but would not get the overheat
warning. The engine could catch fire and you or
others could be burned. Use a 50/50 mixture of
clean, drinkable water and DEX-COOL
®coolant.
Use a 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant. If using this mixture, nothing else
needs to be added. This mixture:
.Gives freezing protection down to −37°C (−34°F),
outside temperature.
.Gives boiling protection up to 129°C (265°F),
engine temperature.
.Protects against rust and corrosion.
.Will not damage aluminum parts.
.Helps keep the proper engine temperature. Notice:
If an improper coolant mixture is used,
the engine could overheat and be badly damaged.
The repair cost would not be covered by the vehicle
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core, and
other parts.
Notice: If extra inhibitors and/or additives are used
in the vehicle's cooling system, the vehicle could be
damaged. Use only the proper mixture of the engine
coolant listed in this manual for the cooling system.
See Recommended Fluids and Lubricants
on
page 7‑10for more information.
Checking Coolant
The vehicle must be on a level surface when checking
the coolant level.
Check to see if coolant is visible in the coolant surge
tank. If the coolant inside the coolant surge tank is
boiling, do not do anything else until it cools down.
If coolant is visible but the coolant level is not at or
above the FULL COLD mark, add a 50/50 mixture of
clean, drinkable water and DEX-COOL coolant at the
coolant recovery tank, but be sure the cooling system
is cool before this is done. See Engine Coolant
on
page 6‑34for more information.
6-35

4. With the coolant surge tank pressure cap off, start the engine and let it run until you can feel the
upper radiator hose getting hot. Any time during
this procedure, watch out for the engine
cooling fan.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower, add
more of the proper mixture to the coolant surge
tank until the level stabilizes at the FULL COLD
mark on the coolant surge tank. 5. Replace the pressure cap. Be sure the pressure
cap is hand-tight and fully seated.
Check the level in the surge tank when the system
has cooled down. If the coolant is not at the proper
level, repeat Steps 1 through 4, then reinstall the
pressure cap. If the coolant is not at the proper
level when the system cools down again, see your
dealer/retailer.
Notice: If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
Engine Overheating
The vehicle has several indicators to warn of engine
overheating.
There is an engine coolant temperature gauge on
the instrument panel cluster. See Engine Coolant
Temperature Gauge
on page 4‑40. The vehicle may
also display a COOLANT OVER TEMPERATURE
message on the Driver Information Center (DIC).
See DIC Warnings and Messages
on page 4‑52for more information.
You may decide not to lift the hood but to get service
help right away. See Roadside Assistance Program
on
page 8‑7.
6-38