2012 CHEVROLET COLORADO engine overheat

Black plate (9,1)Chevrolet Colorado Owner Manual - 2012
Instruments and Controls 5-9
Here are four things that some
owners ask about. None of these
indicate a problem with the vehicle's
fuel gauge:
.At the gas station, the gas pump
shuts off before the gauge
reads full.
.It takes a little more or less
fuel to fill up than the gauge
indicated. For example, the
gauge may have indicated the
tank was half full, but it actually
took a little more or less than
half the tank's capacity to fill
the tank.
.The gauge moves a little while
turning a corner or speeding up.
.The gauge does not go back
to empty when the ignition is
turned off.
When the fuel in the fuel tank is
low, a LOW FUEL message will
display on the Driver Information
Center (DIC). See Fuel System
Messages on page 5‑24 for more
information.
Engine Coolant
Temperature Gauge
This gauge shows the engine
coolant temperature.
If the gauge pointer is near the top
of the gauge, the engine is too hot.
It means that the engine coolant
has overheated. If the vehicle has
been operating under normal driving
conditions, pull the vehicle off the
road, stop the vehicle and turn off
the engine as soon as possible. See
Engine Overheating on
page 10‑22 for more information.
Safety Belt Reminders
Driver Safety Belt Reminder
Light
When the engine is started, a chime
sounds for several seconds to
remind a driver to fasten the safety
belt, unless the driver safety belt is
already buckled.
The safety belt light comes on and
stays on for several seconds, then
flashes for several more.

Black plate (23,1)Chevrolet Colorado Owner Manual - 2012
Instruments and Controls 5-23
Brake System Messages
ABS (Antilock Brake System)
FAULT
This message displays if there is a
problem with the Antilock Brake
System (ABS). Check the ABS as
soon as possible and have your
vehicle serviced by your dealer. See
Braking on page 9‑4andAntilock
Brake System (ABS) Warning Light
on page 5‑16 for 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. See Braking on page 9‑4
and Antilock Brake System (ABS)
Warning Light on page 5‑16 for
more information. Press and release
the reset stem to acknowledge the
message and clear it from the
display.
FLUID
This message displays if the brake
fluid is low. Check the brake fluid
as soon as possible and have your
vehicle serviced by your dealer.
See Braking on page 9‑4 for more
information. Press and release the
reset stem to acknowledge the
message and clear it from the
display.
PARK BRK (Brake)
This message displays when the
parking brake is set. See Parking
Brake on page 9‑41 andAntilock
Brake System (ABS) Warning Light
on page 5‑16 for more information.
The message clears from the
display after the parking brake
is released or by pressing and
releasing the reset stem.
Door Ajar Messages
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.
Engine Cooling System
Messages
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. See
Engine Overheating on page 10‑22
and Climate Control Systems on
page 8‑1 for more information. This
message displays along with the
ENG HOT message.

Black plate (24,1)Chevrolet Colorado Owner Manual - 2012
5-24 Instruments and Controls
ENG (Engine) HOT
This message displays when the
engine coolant temperature is
hot. Check the engine coolant
temperature gauge. SeeEngine
Coolant Temperature Gauge on
page 5‑9. Have your vehicle
serviced by your dealer as soon
as possible if you suspect the
engine is overheating. See Engine
Overheating on page 10‑22 for more
information.
Engine Oil Messages
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. See Engine Oil on
page 10‑9 andMaintenance
Schedule on page 11‑3 for more
information. Press and release the
reset stem to acknowledge the
message and clear it from the
display.
OIL
This message displays when the oil
pressure is low. See Engine Oil
Pressure Light on page 5‑18 and
Engine Oil on page 10‑9 for more
information.
Engine Power Messages
REDUCED POWER
This message displays when the
vehicle's engine power is reduced.
Reduced engine power can affect
the vehicle's ability to accelerate.
If this message is on, 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 this message is on,
but acceleration and speed may be
reduced. Anytime this message
stays on, the vehicle should be
taken to your dealer for service as soon as possible. Press and release
the reset stem to acknowledge
the message and clear it from the
display.
Fuel System Messages
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. See
Malfunction Indicator Lamp on
page 5‑13
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.

Black plate (8,1)Chevrolet Colorado Owner Manual - 2012
9-8 Driving and Operating
.Use headlamps even during the
day to make the vehicle more
visible.
{WARNING
Driving to the top of a hill at high
speed can cause an accident.
There could be a drop-off,
embankment, cliff, or even
another vehicle. You could be
seriously injured or killed. As you
near the top of a hill, slow down
and stay alert.
.Never go downhill forward or
backward with either the
transmission or transfer case in
N (Neutral). The brakes could
overheat and you could lose
control.
{WARNING
If the vehicle has the two‐speed
automatic transfer case, shifting
the transfer case to N (Neutral)
can cause your vehicle to roll
even if the transmission is
in P (Park) for an automatic
transmission or any gear position
for a manual transmission. This is
because the N (Neutral) position
on the transfer case overrides the
transmission. You or someone
else could be injured. If leaving
the vehicle, set the parking
brake and shift the transmission
to P (Park) for an automatic
transmission or any gear position
for a manual transmission. Shift
the transfer case to any position
but N (Neutral).
.When driving down a hill, keep
the vehicle headed straight
down. Use a low gear because
the engine will work with the
brakes to slow the vehicle and
help keep the vehicle under
control.
{WARNING
Heavy braking when going down
a hill can cause your brakes to
overheat and fade. This could
cause loss of control and you or
others could be injured or killed.
Apply the brakes lightly when
descending a hill and use a low
gear to keep vehicle speed under
control.

Black plate (15,1)Chevrolet Colorado Owner Manual - 2012
Driving and Operating 9-15
Run the engine for short periods
only as needed to keep warm, but
be careful.
To save fuel, run the engine for only
short periods as needed to warm
the vehicle and then shut the engine
off and close the window most of
the way to save heat. Repeat this
until help arrives but only when you
feel really uncomfortable from the
cold. Moving about to keep warm
also helps.
If it takes some time for help to
arrive, now and then when you run
the engine, push the accelerator
pedal slightly so the engine runs
faster than the idle speed. This
keeps the battery charged to restart
the vehicle and to signal for help
with the headlamps. Do this as little
as possible to save fuel.If the Vehicle Is Stuck
Slowly and cautiously spin the
wheels to free the vehicle when
stuck in sand, mud, ice, or snow.
See“Rocking Your vehicle to get It
Out” later in this section.
If stuck too severely for the traction
system to free the vehicle, turn the
traction system off and use the
rocking method.
{WARNING
If the vehicle's tires spin at high
speed, they can explode, and you
or others could be injured. The
vehicle can overheat, causing an
engine compartment fire or other
damage. Spin the wheels as little
as possible and avoid going
above 55 km/h (35 mph).
For information about using tire
chains on the vehicle, see Tire
Chains on page 10‑66.
Rocking the Vehicle to get
It Out
Turn the steering wheel left and
right to clear the area around the
front wheels. For four-wheel drive
vehicles, shift into 4HI. Turn off any
traction system. Shift back and forth
between R (Reverse) and a forward
gear, or with a manual transmission,
between 1 (First) or 2 (Second) and
R (Reverse), spinning the wheels
as little as possible. To prevent
transmission wear, wait until the
wheels stop spinning before shifting
gears. Release the accelerator
pedal while shifting, and press
lightly on the accelerator pedal
when the transmission is in gear.
Slowly spinning the wheels in the
forward and reverse directions
causes a rocking motion that could
free the vehicle. If that does not
get the vehicle out after a few tries,
it might need to be towed out.
Recovery hooks can be used, if the
vehicle has them. If the vehicle does
need to be towed out, see Towing
the Vehicle on page 10‑89.

Black plate (25,1)Chevrolet Colorado Owner Manual - 2012
Driving and Operating 9-25
Starting the Engine
Place the transmission in the
proper gear.
Automatic Transmission
Move the shift lever to P (Park) or
N (Neutral). The engine will not start
in any other position. To restart the
vehicle when it is already moving,
use N (Neutral) only.
Notice:Do not try to shift to
P (Park) if the vehicle is moving.
If you do, you could damage the
transmission. Shift to P (Park)
only when the vehicle is stopped.
Manual Transmission
The shift lever should be in
N (Neutral) and the parking brake
engaged. Hold the clutch pedal
down to the floor and start the
engine. The vehicle will not start
if the clutch pedal is not all the
way down.
Starting Procedure
1. With your foot off the accelerator pedal, turn the ignition key to
START. When the engine starts,
let go of the key. The idle speed
will go down as the engine
warms. Do not race the engine
immediately after starting it.
Operate the engine and
transmission gently to allow the
oil to warm up and lubricate all
moving parts.
The vehicle has a
Computer-Controlled Cranking
System. This feature assists in
starting the engine and protects
components. If the ignition key is
turned to the START position,
and then released when the
engine begins cranking, the
engine will continue cranking
for a few seconds or until the
vehicle starts. If the engine does
not start and the key is held
in START for many seconds,
cranking will be stopped after
15 seconds to prevent cranking
motor damage. To prevent gear damage, this system also
prevents cranking if the engine
is already running. Engine
cranking can be stopped by
turning the ignition switch
to ACC/ACCESSORY or
LOCK/OFF.
Notice: Cranking the engine for
long periods of time, by returning
the key to the START position
immediately after cranking has
ended, can overheat and damage
the cranking motor, and drain the
battery. Wait at least 15 seconds
between each try, to let the
cranking motor cool down.
2. If the engine does not start
after 5‐10 seconds, especially
in very cold weather (below 0°F
or−18°C), it could be flooded
with too much gasoline. Push
the accelerator pedal all the way
to the floor and holding it there
as you hold the key in START
for a maximum of 15 seconds.
Wait at least 15 seconds
between each try, to allow
the cranking motor to cool.

Black plate (26,1)Chevrolet Colorado Owner Manual - 2012
9-26 Driving and Operating
When the engine starts, let go
of the key and accelerator. If
the vehicle starts briefly but
then stops again, repeat the
procedure. This clears the extra
gasoline from the engine. Do not
race the engine immediately
after starting it. Operate the
engine and transmission gently
until the oil warms up and
lubricates all moving parts.
Notice: The engine is designed
to work with the electronics in
the vehicle. If you add electrical
parts or accessories, you could
change the way the engine
operates. Before adding electrical
equipment, check with your
dealer. If you do not, the engine
might not perform properly. Any
resulting damage would not be
covered by the vehicle warranty.Engine Heater
The engine coolant heater can
provide easier starting and better
fuel economy during engine
warm-up in cold weather conditions
at or below −18°C (0°F ). Vehicles
with an engine coolant heater
should be plugged in at least
four hours before starting.
An internal thermostat in the
plug-end of the cord may exist
which will prevent engine coolant
heater operation at temperatures
above −18°C (0°F).
To Use the Engine 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 side of the vehicle.
3. Plug it into a normal, grounded 110-volt AC outlet.
{WARNING
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 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 to prevent damage.
The length of time the heater should
remain plugged in depends on
several factors. Ask a dealer in the
area where you will be parking the
vehicle for the best advice on this.

Black plate (28,1)Chevrolet Colorado Owner Manual - 2012
9-28 Driving and Operating
Leaving the Vehicle With the
Engine Running (Automatic
Transmission)
{WARNING
It can be dangerous to leave the
vehicle with the engine running.
The vehicle could move suddenly
if the shift lever is not fully in
P (Park) with the parking brake
firmly set. And, if you leave the
vehicle with the engine running, it
could overheat and even catch
fire. You or others could be
injured. Do not leave the vehicle
with the engine running.
If you have to leave the vehicle with
the engine running, be sure the
vehicle is in P (Park) and the
parking brake is firmly set before
you leave it. After you have moved
the shift lever into P (Park), hold the
regular brake pedal down. Then,
see if you can move the shift lever
away from P (Park) without first pulling it toward you. If you can, the
shift lever was not fully locked into
P (Park).
Torque Lock (Automatic
Transmission)
If you are parking on a hill and
you do not shift the transmission
into P (Park) properly, the weight
of the vehicle may put too much
force on the parking pawl in the
transmission. You may find it difficult
to pull the shift lever out of P (Park).
This is called torque lock. To
prevent torque lock, set the parking
brake and then shift into P (Park)
properly before you leave the driver
seat. To find out how, see
“Shifting
Into Park (Automatic Transmission)”
in this section.
When you are ready to drive, move
the shift lever out of P (Park) before
you release the parking brake.
If torque lock does occur, you may
need to have another vehicle push
yours a little uphill to take some of the pressure from the parking pawl
in the transmission, so you can pull
the shift lever out of P (Park).
Shifting out of Park
(Automatic Transmission)
The vehicle has an automatic
transmission shift lock control
system. You have to fully apply the
brake pedal before you can shift
from P (Park) when the ignition
is ON/RUN. See
Automatic
Transmission on page 9‑31.
The shift lock control system is
designed to do the following:
.Prevent the ignition key from
being removed unless the shift
lever is in P (Park).
.Prevent movement of the shift
lever out of P (Park), unless the
ignition is in ON/RUN and the
brake pedal is applied.
The shift lock control system is
always functional except in the case
of a dead battery or low voltage
(less than 9 V) battery.