2007 CHEVROLET CORVETTE coolant level

Head-Up Display (HUD)
{CAUTION:
If the HUD image is too bright, or too
high in your eld of view, it may take you
more time to see things you need to see
when it is dark outside. Be sure to keep
the HUD image dim and placed low in your
eld of view.
If your vehicle has the Head-Up Display (HUD), you
can see some of the driver information that appears
on the instrument panel cluster.
The information may be displayed in English or
metric units and appears as an image focused out
toward the front of your vehicle. The HUD consists
of the following information:
Speedometer
Turn Signal Indicators
High-Beam Indicator Symbol
Tachometer
Manual Paddle Shift Gear Indicator
(If Equipped)
These displays on the HUD are for use when
using the manual paddle shift controls to shift
the transmission. See “Manual Paddle Shift” in
Automatic Transmission Operation on page 95.
Shift Light
This light is used for performance driving to
indicate that the vehicle’s best performance
level has been reached to shift the transmission
into the next higher gear. An arrow pointing up
will light up on the display just prior to reaching
the engine fuel cut-off mode. This cut-off is
about 6,500 RPM for the LS2 engine and
7,000 RPM for the LS7 engine.
Check Gages Warning
Engine Coolant Temperature Gage
Transmission Fluid Temperature Gage,
(Automatic Transmission Vehicles Only)
Engine Oil Temperature Gage
Engine Oil Pressure Gage
G-Force Gage
Audio Functions, Street Mode Only
Navigation, Only with Navigation Radio,
Turn-by-Turn Guidance
174

CHANGE ENGINE OIL
This message displays when the life of the engine
oil has expired. SeeScheduled Maintenance on
page 433. After an oil change, the engine oil
life system must be reset. See “Engine Oil Life”
underDIC Controls and Displays on page 208.
Also, seeEngine Oil on page 333andEngine Oil
Life System on page 340for more information.
CHECK BRAKE FLUID
This message displays, a chime sounds, and the
brake system warning light on the instrument
panel cluster turns on if the ignition is on to inform
the driver that the brake uid level is low. See
Brake System Warning Light on page 196. Have
the brake system serviced by your dealer as
soon as possible. SeeBrakes on page 361.
CHECK COOLANT LEVEL
This message displays when the engine coolant
level is low. Have the cooling system serviced
by your dealer as soon as possible. SeeEngine
Coolant on page 347.
CHECK GAS CAP
This message displays if the fuel cap has not
been fully tightened. Check the fuel cap to make
sure that it is on properly. Once tightened, it takes
at least one overnight park to reset or clear this
message. If both the CHECK GAS CAP message
and the malfunction indicator lamp in the
instrument panel cluster are on, you may need to
see your dealer for service. SeeMalfunction
Indicator Lamp on page 200for more information.
CHECK OIL LEVEL
This message displays and two chimes sound if
the oil level in the vehicle is low. Once the vehicle
senses a change in the engine oil level, the
light remains off.
If this message appears after starting the engine,
the engine oil level may be too low. You may
need to add oil. SeeEngine Overheating on
page 350.
To acknowledge the message, press the RESET
button. The message reappears every 10 minutes
until this condition changes.
217

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 continuous chime
sounds when the engine has overheated. Stop and
turn the engine off immediately to avoid severe
engine damage. SeeEngine Overheating on
page 350.
ENGINE PROTECTION REDUCE
ENGINE RPM
This message displays if the engine oil
temperature exceeds 320°F (160°C). Check the
engine coolant temperature and engine oil level. If
the engine is too hot, seeEngine Overheating
on page 350. Your vehicle may need service, so
see your dealer.You can monitor the oil temperature with the
gages button on the DIC. SeeDIC Controls and
Displays on page 208.
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 displays when one or more of the
tires is over-inated. 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.
219

Have the tire pressures checked and set to those
shown on the Tire Loading Information label. See
Extended Mobility Tires on page 384,Loading Your
Vehicle on page 309,Ination - Tire Pressure on
page 386, andTire Pressure Monitor System on
page 389.
To acknowledge the message, press the RESET
button. A message reappears every 10 minutes
until the condition is corrected.
The DIC display also shows the tire pressure
values for the front and rear tires by pressing the
gages button. SeeDIC Controls and Displays
on page 208.
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 your vehicle. If this
message continues to appear, have the system
repaired by your dealer 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 multiple chime also sounds when this
message is displayed. Rell the fuel tank as soon
as possible. SeeFuel Gage on page 206.
LOW OIL PRESSURE
This message displays if low oil pressure levels
occur. If this message appears while the engine is
running, stop the engine and do not operate it
until the cause of low oil pressure is corrected.
Severe damage to the engine can result. A
multiple chime sounds when this message is
displayed. SeeEngine Oil on page 333.
220

A. Engine Air Cleaner/Filter. SeeEngine
Air Cleaner/Filter on page 342.
B. Power Steering Fluid Reservoir.
SeePower Steering Fluid on page 358.
C. Engine Compartment Fuse Block. SeeEngine
Compartment Fuse Block on page 422.
D. Remote Positive Terminal (Out of View).
SeeBattery on page 364.
E. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 333.
F. Dry Sump Engine Oil Tank. See “Changing
Engine Oil and Filter (Z06 Only)”Engine Oil
on page 333.
G. Engine Oil Fill Cap. See “When to Add
Engine Oil” underEngine Oil on page 333.
H. Coolant Surge Tank and Pressure Cap.
SeeEngine Coolant on page 347.
I. Windshield Washer Fluid Reservoir.
See “Adding Washer Fluid” under
Windshield Washer Fluid on page 360.
J. Brake Fluid Reservoir. See “Brake Fluid”
underBrakes on page 361.
K. Clutch Master Cylinder Reservoir.
SeeHydraulic Clutch on page 346.Engine Oil
Checking Engine Oil (Except Z06)
If the CHECK OIL LEVEL message on the Driver
Information Center (DIC) comes on, check the
engine oil level right away. For more information,
seeDriver Information Center (DIC) on page 207.
You should check the engine oil level regularly;
this is an added reminder.
It is a good idea to check the engine oil level
every time you get fuel. In order to get an accurate
reading, the oil must be warm and the vehicle
must be on level ground.
The engine oil dipstick handle is a yellow loop.
SeeEngine Compartment Overview on page 330
for the location of the engine oil dipstick.
1. Turn off the engine and give the oil a few
minutes to drain back into the oil pan. If
you do not do this, the oil dipstick might not
show the actual level.
2. Pull out the dipstick and clean it with a
lint-free paper towel or a cloth, then push
it back in all the way. Remove it again,
keeping the tip down.
333

Checking Coolant
The engine coolant
surge tank is located
toward the rear of the
engine compartment
on the driver’s side of
the vehicle. SeeEngine
Compartment Overview
on page 330for more
information on location.
{CAUTION:
Turning the surge tank pressure cap when
the engine and radiator are hot can allow
steam and scalding liquids to blow out
and burn you badly. Never turn the surge
tank pressure cap — even a little — when
the engine and radiator are hot.The vehicle must be on a level surface. When
your engine is cold, the coolant level should
be at the FULL COLD mark. The FULL COLD
mark is on the front of the coolant surge tank.
Do not overll the surge tank. Too much coolant
can result in an overow when the uid is hot.
Adding Coolant
If you need more coolant, add the proper
DEX-COOL®coolant mixture at the surge tank,
but only when the engine is cool.
{CAUTION:
You can be burned if you spill coolant
on hot engine parts. Coolant contains
ethylene glycol, and it will burn if
the engine parts are hot enough.
Do not spill coolant on a hot engine.
When replacing the pressure cap, make sure
it is hand-tight and fully seated.
349

Cooling System
When you decide it is safe to lift the hood,
here is what you will see:
A. Electric Engine Cooling Fan
B. Coolant Surge Tank with Pressure Cap{CAUTION:
An electric engine cooling fan under the
hood can start up even when the engine
is not running and can injure you. Keep
hands, clothing, and tools away from
any underhood electric fan.
If the coolant inside the coolant surge tank is
boiling, do not do anything else until it cools down.
The vehicle should be parked on a level surface.
353

The coolant level should be at the FULL COLD
mark on the front of the coolant surge tank. If it is
not, you may have a leak at the pressure cap or in
the radiator hoses, heater hoses, radiator, water
pump or somewhere else in the cooling system.
{CAUTION:
Heater and radiator hoses, and other
engine parts, can be very hot. Do not
touch them. If you do, you can be burned.
Do not run the engine if there is a leak.
If you run the engine, it could lose all
coolant. That could cause an engine re,
and you could be burned. Get any leak
xed before you drive the vehicle.
If there seems to be no leak, with the engine on,
check to see if the electric engine cooling fan is
running. If the engine is overheating, the fan should
be running. If it is not, your vehicle needs service.Notice:Engine damage from running your
engine without coolant is not covered by your
warranty. SeeOverheated Engine Protection
Operating Mode on page 352for information
on driving to a safe place in an emergency.
Notice:Using coolant other than DEX-COOL
®
may cause premature engine, heater core,
or radiator corrosion. In addition, the engine
coolant could require changing sooner,
at 30,000 miles (50 000 km) or 24 months,
whichever occurs rst. Any repairs would
not be covered by your warranty. Always
use DEX-COOL
®(silicate-free) coolant in
your vehicle.
How to Add Coolant to the Coolant
Surge Tank
If you have not found a problem yet, check
to see if coolant is visible in the surge tank.
If coolant is visible but the coolant level is not
at the FULL COLD mark on the front of the
coolant surge tank, add a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant at
354