2007 CHEVROLET COLORADO coolant temperature

Engine Coolant Heater
Your vehicle may have this feature.
In very cold weather, 0°F (–18°C) or colder, the
engine coolant heater can help. You will 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.
Your vehicle may also have an internal thermostat
in the plug end of the cord. This will prevent
operation of the engine coolant heater when the
temperature is at or above 0°F (−18°C) as
noted on the cord.
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical
cord. The cord is located in the engine
compartment behind the underhood fuse block
on the driver’s side of the vehicle.
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 re. You
could be seriously injured. Plug the cord
into a properly grounded three-prong
110-volt AC outlet. If the cord will not
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 do
not, 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/retailer in the area where you will be parking
your vehicle. The dealer/retailer can give you
the best advice for that particular area.
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Brake System Warning Light..................... 189
Anti-Lock Brake System Warning Light...... 190
Engine Coolant Temperature Gage............ 191
Tire Pressure Light.................................... 191
Malfunction Indicator Lamp........................ 192
Oil Pressure Light..................................... 195
Security Light............................................ 196
Cruise Control Light.................................. 196
Highbeam On Light................................... 196
Daytime Running Lamps (DRL)
Indicator Light........................................ 197
Fuel Gage................................................. 197
Driver Information Center (DIC).................. 198
DIC Controls and Displays........................ 198
DIC Warnings and Messages.................... 202Audio System(s)......................................... 206
Setting the Time........................................ 208
AM-FM Radio............................................ 209
Radio with CD (MP3)................................ 212
Radio with Six-Disc CD............................. 222
Using an MP3........................................... 234
XM Radio Messages................................. 240
Theft-Deterrent Feature............................. 242
Radio Reception........................................ 242
Care of Your CDs..................................... 243
Care of the CD Player.............................. 243
Fixed Mast Antenna.................................. 244
XM™ Satellite Radio Antenna System....... 244
Chime Level Adjustment............................ 244
Section 3 Instrument Panel
158

Engine Coolant Temperature Gage
This gage shows the
engine coolant
temperature.
If the gage pointer is near the top of the gage,
the engine is too hot. It means that your engine
coolant has overheated. 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.
SeeEngine Overheating on page 348for
more information.
Tire Pressure Light
This light should come
on briey when you turn
the ignition to ON.
This light will also come on when one or more
of your tires are signicantly underinated.
A LOW TIRE message will also appear in the
Driver Information Center (DIC), seeDIC Warnings
and Messages on page 202for more information.
Stop and check your tires as soon as it is safe to do
so. If underinated, inate to the proper pressure.
SeeTires on page 377for more information.
This light will ash for 60 seconds and then turn on
solid if a problem is detected with the Tire Pressure
Monitor system. SeeTire Pressure Monitor System
on page 385for more information.
191

DIC Warnings and Messages
Messages are displayed on the DIC to notify the
driver that the status of the vehicle has changed
and that some action may be needed by the driver
to correct the condition. Multiple messages may
appear one after another. The messages are
displayed for several seconds each.
Some messages may not require immediate
action, but you should press and release the
trip odometer reset stem to acknowledge that you
received the messages and to clear them from
the display. Each message must be acknowledged
individually.
Some messages cannot be cleared from the
DIC display because they are more urgent.
These messages require action before they
can be cleared. You should take any messages
that appear on the display seriously and remember
that clearing the messages only makes the
messages disappear, not correct the problem.
The following are the possible messages that can
be displayed and some information about them.
AC (Air Conditioning) OFF
This message displays when the engine coolant
temperature is too high and the air conditioning
in your vehicle needs to be turned off. SeeEngine
Overheating on page 348andClimate Control
System on page 177for more information.
This message displays along with the ENG HOT
message.
ABS (Anti-Lock Brake System) FAULT
This message displays if there is a problem
with the Anti-Lock Brake System (ABS). Check
the ABS as soon as possible and have your
vehicle serviced by your dealer. SeeBrakes on
page 357andAnti-Lock Brake System Warning
Light on page 190for more information. Press
and release the reset stem to acknowledge
the message and clear it from the display.
BRAKES
This message displays if there is a problem with
the brakes. Check the brakes as soon as possible
and have your vehicle serviced by your dealer.
202

SeeBrakes on page 357andBrake System
Warning Light on page 189for more information.
Press and release the reset stem to acknowledge
the message and clear it from the display.
CHANGE OIL
This message displays when the oil needs to be
changed. Check the oil in your vehicle as soon
as possible and have your vehicle serviced by
your dealer. SeeEngine Oil on page 333
andScheduled Maintenance on page 442for
more information. Press and release the reset
stem to acknowledge the message and clear
it from the display.
DOORS
This message displays when one or more of
the doors is ajar. Check all the doors on your
vehicle to make sure they are closed. The
message clears from the display after all of
the doors are closed.
ENG (Engine) HOT
This message displays when the engine
coolant temperature is hot. Check the
engine coolant temperature gage.SeeEngine Coolant Temperature Gage on
page 191. Have your vehicle serviced by your
dealer as soon as possible if you suspect
the engine is overheating. SeeEngine
Overheating on page 348for more information.
FLUID
This message displays if the brake uid is low.
Check the brake uid as soon as possible
and have your vehicle serviced by your dealer.
SeeBrakes on page 357for more information.
Press and release the reset stem to acknowledge
the message and clear it from the display.
FUEL CAP
This message displays if the vehicle’s fuel cap is
either off or loose. Pull over as soon as possible
and check to see if the fuel cap is secure. You may
also see the check engine light on the instrument
panel cluster. If the check engine light does
come on when the fuel cap was loose, it may
take a few driving trips before the light turns off.
SeeMalfunction Indicator Lamp on page 192
for more information if the light still remains on.
Press and release the reset stem to acknowledge
the message and clear it from the display.
203

Making Turns
Notice:Making very sharp turns while
trailering could cause the trailer to come in
contact with the vehicle. Your vehicle could
be damaged. Avoid making very sharp
turns while trailering.
When you’re turning with a trailer, make wider turns
than normal. Do this so your trailer won’t strike soft
shoulders, curbs, road signs, trees or other objects.
Avoid jerky or sudden maneuvers. Signal well
in advance.
Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle has to have
extra wiring and a heavy-duty turn signal asher.
The arrows on your instrument panel will ash
whenever you signal a turn or lane change.
Properly hooked up, the trailer lamps will also
ash, telling other drivers you’re about to
turn, change lanes or stop.
When towing a trailer, the arrows on your
instrument panel will ash for turns even if
the bulbs on the trailer are burned out.Thus, you may think drivers behind you are seeing
your signal when they are not. It’s important to
check occasionally to be sure the trailer bulbs are
still working.
Driving On Grades
Reduce speed and shift to a lower gear before
you start down a long or steep downgrade.
If you don’t shift down, you might have to use
your brakes so much that they would get hot
and no longer work well.
When towing at high altitude on steep uphill
grades, consider the following: Engine coolant
will boil at a lower temperature than at normal
altitudes. If you turn your engine off immediately
after towing at high altitude on steep uphill grades,
your vehicle may show signs similar to engine
overheating. To avoid this, let the engine run
while parked (preferably on level ground) with
the automatic transmission in PARK (P) (or
the manual transmission out of gear and the
parking brake applied) for a few minutes before
turning the engine off. If you do get the overheat
warning, seeEngine Overheating on page 348.
318

How to Check and Add Fluid
The proper uid should be added if the level does
not reach the bottom of the diaphragm when it
is in place in the reservoir. See the instructions
on the reservoir cap.
Engine Coolant
The cooling system in your vehicle is lled with
DEX-COOL®engine coolant. This coolant is
designed to remain in your vehicle for ve years
or 150,000 miles (240 000 km), whichever occurs
rst, 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, seeEngine
Overheating on page 348.A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
Give freezing protection down
to−34°F (−37°C).
Give boiling protection up
to 265°F (129°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work
as they should.
Notice:Using coolant other than DEX-COOL
®
may cause premature engine, heater core,
or radiator corrosion. In addition, the engine
coolant may require changing sooner, at
the rst maintenance service after each
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.
345

Radiator Pressure Cap
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.
SeeEngine Compartment Overview on page 332
for more information on location.
Engine Overheating
A coolant temperature gage is on the instrument
panel. SeeEngine Coolant Temperature Gage
on page 191.
The air conditioning might stop working if the
engine is too hot. This is normal and helps
cool the engine.
If Steam Is Coming From Your Engine
{CAUTION:
Steam from an overheated engine can
burn you badly, even if you just open the
hood. Stay away from the engine if you
see or hear steam coming from it. Just
turn it off and get everyone away from
the vehicle until it cools down. Wait until
there is no sign of steam or coolant
before you open the hood.
If you keep driving when your engine is
overheated, the liquids in it can catch re.
You or others could be badly burned.
Stop your engine if it overheats, and get
out of the vehicle until the engine is cool.
Notice:If your engine catches re because
you keep driving with no coolant, your vehicle
can be badly damaged. The costly repairs
would not be covered by your warranty.
348