2009 CHEVROLET KODIAK engine

Notice:If the wait to start light stays on after
starting the vehicle, the vehicle may not run
properly. Have the vehicle serviced right away.
3. If the engine does not start after 15 seconds
of cranking, turn the ignition key to OFF. Wait one
minute for the starter to cool, then try the same
steps again.
If you are trying to start the engine after you have run
out of fuel, seeRunning Out of Fuel on page 5-17.
When the engine is cold, let it run for a few minutes
before you move the vehicle. This lets oil pressure build
up. The engine will sound louder when it is cold.
Notice:If you are not in an idling vehicle and the
engine overheats, you would not be there to see the
overheated engine indication. This could damage
the vehicle. Do not let the engine run when you are
not in the vehicle.
Cold Weather Starting
If the vehicle has the 6.6L DURAMAX®Diesel Engine or
the Isuzu 6H Diesel Engine, the following notice applies:
Notice:The diesel engine has an electric air intake
heater system which reduces white smoke and
helps start the engine in cold weather. Do not spray
starting fluid into the air intake where it can
contact the heater elements.If you do not have the GM Automatic Ether Injection
System, do not use starting fluid or you could
damage the engine. If you have the GM system, use
only GM approved starting fluid that has been tested
to establish compatibility with the air inlet heater
system.
The following tips will help with engine starting in cold
weather.
•Use the recommended engine oil when the outside
temperature drops below freezing. SeeEngine Oil
(DURAMAX Diesel Engine) on page 5-24or
Engine Oil (Caterpillar Diesel Engine) on page 5-27
orEngine Oil (Isuzu Diesel Engine) on page 5-28
orEngine Oil (Gasoline Engine) on page 5-32.
When the outside temperature drops below
0°F (−18°C), use of the optional engine coolant
heater is recommended.
•If you experience longer cranking times, notice an
unusual amount of exhaust smoke or are at
higher altitudes (over 7,000 ft. or 2 135 m), you may
use the optional engine coolant heater. See
Engine Coolant Heater on page 2-25.
•SeeWhat Fuel to Use on page 5-8for information
on what fuel to use in cold weather.
2-15

Cold Weather Starting (Caterpillar®
Diesel)
Because the diesel engine uses compression ignition, it
is harder to start in cold weather than a gasoline engine.
The air intake heater, use of the proper engine oil,
optional engine coolant heater and optional ether
injection system help cold weather starting. See the
Caterpillar
®Diesel Engine Operation & Maintenance
Manual for more information.
Restarting the Diesel Engine While
Moving (Automatic Transmission)
If you have to restart the engine while the vehicle is
moving, shift to N (Neutral).
Stopping the Diesel Engine
1. Apply the parking brake. SeeParking Brake (With
Hydraulic Brakes) on page 2-38orParking Brake
(With Air Brakes) on page 2-41for parking
brake apply procedure.
2. Shift into N (Neutral) for a manual transmission or
P (Park) for an automatic transmission.3. Turn the ignition key to OFF.
If the vehicle has a two-speed axle, seeTwo-Speed
Rear Axle on page 2-36.
If you have a Caterpillar
®diesel engine, see the
Caterpillar®Diesel Engine Operation & Maintenance
Manual for additional information.
Diesel Engine Warm-Up
Several factors affect how quickly the diesel engine
warms up. These can include outside temperature,
engine load, idle time and the vehicle’s option content.
The vehicle may be equipped with some features
that can help the engine reach operating temperature
sooner. Some of these features are discussed below.
Also, remember that an automatic transmission
adds heat to the cooling system through the heat
exchanger in the radiator. Because of this, vehicles
equipped with automatic transmissions are often able to
retain engine coolant heat better than manual
transmission vehicles.
See the Caterpillar
®Operation & Maintenance manual
for additional diesel engine warm-up information.
2-16

If the Diesel Engine Will Not Start
If you have run out of fuel, seeRunning Out of Fuel on
page 5-17.
If you are not out of fuel, and the engine will not start,
do this:
Turn the ignition key to ON/RUN. Immediately after the
wait to start light goes off, turn the ignition key to START.
If the light does not go off, wait a few seconds, then try
starting the engine again. And, see your dealer/retailer
as soon as you can for a starting system check.
If the light comes on and then goes off and you know
the batteries are charged, but the engine still will
not start, the vehicle needs service.
If the light does not come on when the engine is cold,
the vehicle needs service.If the batteries do not have enough charge to start the
engine, seeBattery on page 5-61.
Be sure you have the right oil for the engine, and that
you have changed the oil at the proper times. If you use
the wrong oil, the engine may be harder to start.
Be sure you are using the proper fuel for existing
weather conditions. SeeWhat Fuel to Use on page 5-8.
If the engine starts, runs a short time, then stops, the
vehicle needs service.
{CAUTION:
Do not use gasoline or starting aids, such as
ether, in the air intake. They could damage the
engine. There could also be a fire, which could
cause serious personal injury.
2-17

Engine Alarm and Automatic
Shutdown
The check gages warning light will come on if the
system senses high engine temperature, and a low or
high engine oil pressure. If high engine temperature,
low engine oil pressure or high engine oil pressure
is detected, you will hear a tone alarm at two beats per
second. The alarm and the light will remain on until
the condition is fixed. If the engine temperature or oil
pressure condition worsens, the tone alarm will go to
five beats per second.
If the system senses low engine coolant, the five beat
per second alarm and the low coolant warning light
will come on.
The five beats per second tone alarm means that the
engine will shut down in about 25 to 30 seconds. There
is also an engine shutdown light to indicate that the
engine will shut down. SeeEngine Shutdown Warning
Light on page 3-40.
Pull off the road and shut off the engine. Do not start it
until the reason for the problem is known, and the
problem is fixed. If the engine shuts down when you are
still in traffic, you can restart the engine and get another25 to 30 seconds of operation. Do this only if you have to,
since there is a problem that can harm the engine if it is
not fixed. Engine automatic shutdown, for gasoline
engines, requires activation by your dealer/retailer.
Notice:If you try to operate the vehicle after the
engine automatically shuts down, you may damage
the vehicle. Have the vehicle repaired as soon as
possible.
Ambulance, Fire, and Rescue Packages
The check gages warning light will come on if the
system senses high engine temperature or low engine
oil pressure. If high engine temperature or low engine oil
pressure is detected, you will also hear a tone alarm
at two beats per second. The alarm and the light
will remain on until the condition is fixed. If the engine
temperature or oil pressure condition worsens, the
tone alarm will go to five beats per second.
If the system senses low engine coolant, the five beat
per second alarm and the low coolant warning light
will come on.
The engine will not shutdown, but you should have the
vehicle checked as soon as you can. SeeCheck
Gages Warning Light on page 3-43for more information.
2-18

Idle Shutdown
If the vehicle has a diesel engine it could have an
engine idle shutdown feature.
This feature automatically shuts down the engine after it
idles continuously for five minutes and if the following
conditions are met:
•The parking brake is set.
•The vehicle is at a complete stop.
•The automatic transmission is in N (Neutral) or
P (Park).
If the parking brake is not engaged, then the engine
shuts down after 15 minutes of continuous idling
operation.
The driver can reset the engine shutdown timer by
momentarily changing the position of the accelerator,
brake, or clutch pedal or by shifting the transmission out
of P (Park) or N (Neutral). Once reset, the engine idle
shutdown will restart the shutdown sequence described
above, and will continue to do so until the engine
shuts down or the vehicle is driven.The engine will not go into idle shutdown mode if:
•The Power Take-Off (PTO) equipment is operating.
SeePower Take-Off (PTO) on page 2-30for more
information.
•The engine coolant temperature is below 60°F.
The engine idle shutdown will be activated once
the vehicle coolant reaches 60°F or above.
•The Diesel Particulate Filter (DPF) is in regeneration
mode and the green DPF lamp is illuminated to
notify the driver that DPF is regenerating. The
engine idle shutdown mode will be overridden for
the time necessary to complete the regeneration
process, up to a maximum of 30 minutes.
•Service or maintenance is being performed on the
engine. The engine idle shutdown mode may be
deactivated, by using a diagnostic scan tool,
for a period of up to a maximum of 60 minutes.
2-19

The ENGINE SHUTDOWN WARNING LIGHT will come
on and a continuous chime will alert the driver
30 seconds before the engine goes into idle shutdown
mode. The engine shutdown warning light and chime will
stay on for the entire duration of the idle shutdown
event to inform the driver that the engine is in idle
shutdown mode. SeeEngine Shutdown Warning Light
on page 3-40for more information.
After the engine shutdown occurs, the engine is no
longer running, and the ignition is still in the ON/RUN
position, all accessories can be used. Turn the ignition
switch to START to restart the engine or turn it to
LOCK or OFF to prevent the battery from draining.High Idle System
High Idle System with Switch
If the vehicle has this
feature, the manual high
idle switch is located in the
instrument panel
switchbank.
2-20

This system can be used to increase the engine idle
speed whenever the following conditions are met:
•The brake pedal is not pressed.
•The vehicle is at a complete stop for vehicles with
diesel engines. The vehicle must not be moving
and the accelerator must not be pressed for vehicles
with gasoline engines.
•If the vehicle has manual transmission the clutch
pedal is not pressed or, if the vehicle has the
automatic transmission it is in N (Neutral) or
P (Park).
The manual high idle feature is activated by pressing
the switch on the instrument panel. When the switch is
pressed again, or any of the previous conditions are
not met, manual high idle will be deactivated.
The manual high idle has been preset at the factory.
Your dealer/retailer may change the setting to fit
your needs.
For vehicles with Caterpillar
®diesel engines, the high
idle switch can be used to set any desired high idle
speed.To set a new temporary engine idle speed do the
following:
1. Make sure all of the previously described conditions
are met.
2. Press the accelerator pedal to the desired engine
speed.
3. Momentarily press the manual high idle switch.
The temporary high idle speed will be set. This new high
idle rpm level will be remembered by the system until
either the ignition is turned to OFF or a new high
idle speed is set.
Automatic High Idle System
The automatic high idle feature will engage whenever
you start the vehicle and the engine is below the preset
operating temperature. This will help decrease engine
warm-up time.
On vehicles that have the Caterpillar
®diesel engine you
may have an exhaust restrictor that will operate in
High Idle mode. The exhaust brake switch must be on
for this feature to operate. SeeDiesel Engine Exhaust
Brake on page 2-26for more information.
Idle speed will then return to normal when the engine
reaches the preset operating temperature or has
been operating for at least 10 minutes.
2-21

Exhaust Restrictor (Engine
Warm-Up)
Exhaust Restrictor
If the vehicle has a Isuzu 6H Diesel Engine, it may have
a feature called an Exhaust Restrictor (NPE), which
uses an air actuated valve in the exhaust system
to restrict exhaust gas flow which enhances the engine
and heater warm-up.
Automatic Quick Warm-Up
If the vehicle has a DURAMAX®6600 engine, it has a
feature called an Automatic Quick Warm-Up, which uses
the turbocharger to restrict the exhaust gas flow
which enhances the engine and heater warm-up.
In both systems, exhaust restrictor or automatic quick
warm-up, the cold temperature high idle feature elevates
the engines idle speed, up to 1500 rpm, and restricts
the exhaust gas flow, when outside temperatures
are below 50°F (10°C), and the engine coolant
temperature is below certain levels. This feature
enhances heater performance by raising the engine
coolant temperature faster.For all engines this feature is already turned on. The
automatic quick warm-up on the DURAMAX
®engine
can be turned off and on by doing the following
procedure:
1. Turn the ignition to ON/RUN, with the vehicle off.
2. Press the accelerator pedal to the floor and
hold it while quickly pressing and fully releasing the
brake pedal three times in less than eight seconds.
3. Release the accelerator pedal and start the engine.
The green exhaust brake/restrictor light below the
radio controls will be lit for 10 seconds.
If this feature is turned off, by doing the procedure
described previously, and then the engine is
started, the exhaust brake/restrictor light will flash
for 10 seconds and then it will turn off.
When the engine is started, it will slowly increase to the
high idle speed after a delay of a few seconds; up to
about two minutes. For this method to work properly
there must be no throttle or brake pedal faults, and the
throttle pedal must not fall below 75 percent of wide
open throttle while pressing the brake pedal.
2-22