coolant temperature CHEVROLET CAMARO 2002 4.G Owners Manual

2-35
Engine Coolant Heater (Canada Only)
In very cold weather, 0
F (-18
C) or colder, the engine
coolant heater can help. You'll get easier starting and
better fuel economy during engine warm
-up. Usually, the
coolant heater should be plugged in a minimum of four
hours prior to starting your vehicle. At temperatures above
32
F (0
C), use of the coolant heater is not required.
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord.
The cord is attached to the outside of the underhood
fuse box.3. Plug it into a normal, grounded 110
-volt AC outlet.
CAUTION:
Plugging the cord into an ungrounded outlet
could cause an electrical shock. Also, the wrong
kind of extension cord could overheat and cause
a fire. You could be seriously injured. Plug the
cord into a properly grounded three
-prong
11 0
-volt AC outlet. If the cord won't reach, use a
heavy
-duty three-prong extension cord rated for
at least 15 amps.
4. Before starting the engine, be sure to unplug
and store the cord as it was before to keep it away
from moving engine parts. If you don't, it could
be damaged.
How long should you keep the coolant heater plugged
in? The answer depends on the outside temperature, the
kind of oil you have, and some other things. Instead of
trying to list everything here, we ask that you contact
your dealer in the area where you'll be parking your
vehicle. The dealer can give you the best advice for that
particular area.

2-44
This feature helps you to get the best possible
fuel economy.
It will come on under these conditions:

The engine coolant temperature is greater
than 170F (77C),

you are going 15 to 20 mph (24 to 32 km/h) and

you are at 35 percent throttle or less.
Follow the shift speeds listed below when the SKIP
SHIFT light is on.
Computer
-Aided Manual Transmission Shift Speeds

1st to 4th @ 15 mph (24 km/h)

4th to 5th @ 25 mph (40 km/h)*

5th to 6th @ 49 mph (64 km/h)**
Each time you come to a stop, the engine's Powertrain
Control Module (PCM) determines when to activate
the skip shift upshift system. The skip shift upshift
system is bypassed when you accelerate with more
than 35 percent throttle.
*30 mph (48 km/h) when accelerating to
highway speeds.
**45 mph (72 km/h) when accelerating to
highway speeds.
Parking Brake
To set the parking brake, hold the brake pedal down and
pull up on the parking brake lever. If the ignition is on,
the brake system warning light will come on.

2-91
Engine Coolant Temperature Gage
United States Canada
This gage shows the engine coolant temperature. If the
gage pointer moves into the red area, your engine is
approaching an overheating condition.
If you have been operating your vehicle under normal
driving conditions, you should pull off the road, stop
your vehicle and turn off the engine as soon as possible.
See ªEngine Overheatingº in the Index.
Malfunction Indicator Lamp (Service
Engine Soon Light in the United States or
Check Engine Light in Canada)
United States Canada
Your vehicle is equipped with a computer which
monitors operation of the fuel, ignition and emission
control systems.
This system is called OBD II (On
-Board
Diagnostics
-Second Generation) and is intended to assure
that emissions are at acceptable levels for the life of the
vehicle, helping to produce a cleaner environment. The
SERVICE ENGINE SOON or CHECK ENGINE light
comes on to indicate that there is a problem and service is
required. Malfunctions often will be indicated by the
system before any problem is apparent. This may prevent
more serious damage to your vehicle. This system is also
designed to assist your service technician in correctly
diagnosing any malfunction.

3-3
(Bi-Level): This setting directs air through the
upper air vents and the heater ducts.
(Vent): This setting directs air through the upper
air vents.
(Heater): This setting directs most of the air
through the heater ducts and some of the air through the
windshield defroster vents.
(Blend): This setting directs air through the
windshield defroster vents and the heater ducts.
(Defrost): This setting directs most of the air
through the windshield defroster vents and some of the
air through the heater ducts.
Cooling
The air conditioner works best if you keep your
windows closed. On very hot days, open the windows
just long enough for the hot air to escape.
1. Turn the mode knob to A/C for normal cooling.
For faster cooling turn the knob to MAX.
2. Turn the temperature knob to a comfortable setting.
3. Turn the fan knob to the desired speed.
Heating
The heater works best if you keep your windows closed
while using it.
1. Turn the mode knob to the heater symbol.
2. Turn the fan knob to the desired speed.
3. Turn the temperature knob to a comfortable setting.
During initial start
-up only, if your vehicle is equipped
with an engine coolant heater, you can use it in cold
weather (around 20
F/
-8
C or lower) to improve heater
performance. See ªEngine Coolant Heaterº in the Index.
Bi
-Level
You may want to use bi
-level on cool, but sunny days.
This setting directs cool air toward your body and
warmer air toward your feet.
1. Turn the mode knob to the bi
-level symbol.
2. Turn the temperature knob to a comfortable setting.
3. Turn the fan knob to the desired speed.

5-9
Engine Overheating
You will find a coolant temperature gage on your
instrument panel cluster. See ªEngine Coolant
Temperature Gageº in the Index.
Overheated Engine Protection
Operating Mode
This emergency operating mode allows your vehicle
to be driven to a safe place in an emergency situation.
If an overheated engine condition exists, an overheat
protection mode which alternates firing groups of
cylinders helps prevent engine damage.In this mode, you will notice a significant loss in power
and engine performance. The low coolant light may
come on and the temperature gage will indicate an
overheat condition exists. Driving extended miles (km)
and/or towing a trailer in the overheat protection mode
should be avoided.NOTICE:
After driving in the overheated engine protection
operating mode, to avoid engine damage, allow
the engine to cool before attempting any repair.
The engine oil will be severely degraded. Repair
the cause of coolant loss, change the oil and reset
the oil life system. See ªEngine Oilº in the Index.

6-27 What to Use
Standard Differential
Use SAE 75W
-90 Synthetic Gear Lubricant
(GM Part No. 12378261) or equivalent meeting
GM Specification 9986115.
Limited
-Slip Differential
To add lubricant when the level is low, use SAE 75W
-90
Synthetic Gear Lubricant (GM Part No. 12378261) or
equivalent meeting GM Specification 9986115. To
completely refill after draining, add 4 ounces (118 ml)
of Limited
-Slip Differential Lubricant Additive (GM
Part No. 1052358) or equivalent. Then fill to the bottom
of the filler plug hole with the Synthetic Gear Lubricant.
Engine Coolant
The cooling system in your vehicle is filled with
DEX
-COOL engine coolant. This coolant is designed
to remain in your vehicle for 5 years or 150,000 miles
(240 000 km), whichever occurs first, if you add only
DEX
-COOL extended life coolant.
The following explains your cooling system and how to
add coolant when it is low. If you have a problem with
engine overheating or if you need to add coolant to your
radiator, see ªEngine Overheatingº in the Index.A 50/50 mixture of clean, drinkable water and
DEX
-COOL coolant will:

Give freezing protection down to
-34F (-37C).

Give boiling protection up to 265F (129C).

Protect against rust and corrosion.

Help keep the proper engine temperature.

Let the warning lights and gages work as
they should.
NOTICE:
When adding coolant, it is important that you use
only DEX
-COOL (silicate-free) coolant.
If coolant other than DEX-COOL is added to the
system, premature engine, heater core or
radiator corrosion may result. In addition, the
engine coolant will require change sooner
-- at
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the
use of coolant other than DEX
-COOL is not
covered by your new vehicle warranty.