Chevrolet Duramax 2006 Owner's Manual

2006 DURAMAX

Diesel Engine M

Features and Controls

Starting and Operating Your Vehicle

Instrument Panel

Warning Lights, Gages and Indicators

Driving Your Vehicle

Towing

..................................................... 4-2

..................................... 2-1

............................................. 3-1

....................................... 4-1

............. 2-2

........... 3-2

Service and Appearance Care

Diesel Fuel Requirements and Fuel System Checking Things Under the Hood Capacities and Speciﬁcations

Maintenance Schedule

......................................................................... 1

Index

..................................... 6-1

.......................... 5-1

............... 5-18

..................... 5-50

................................ 6-2

..... 5-2

General Motors, GM, GMC, CHEVROLET, the GM Emblem, the GMC Truck Emblem, the CHEVROLET Emblem, and the names SIERRA, SILVERADO, SAVANA and EXPRESS are registered trademarks of General Motors Corporation.

This manual contains information that pertains to the operation of your diesel engine. It also contains your Diesel Maintenance Schedule. The sections in this manual correspond to the sections in your owner manual. This manual, along with your owner manual, will assist you in the proper use and maintenance of your vehicle.

Keep this manual with the owner manual in your vehicle, so it will be there if you ever need it while you are on the road. If you sell your vehicle, leave this manual and the owner manual with the vehicle.

This manual includes the latest information at the time it was printed. We reserve the rights to make changes in the product after that time without notice.

Canadian Owners

A French language copy of this manual can be obtained from your dealer or from:

Helm, Incorporated P.O. Box 07130 Detroit, MI 48207

Litho in U.S.A. Part No. 15105920 B Second Printing

Section 2 Features and Controls

Starting and Operating Your Vehicle .................2-2

Starting the Diesel Engine ...............................2-2

Winter Cover (Pickup Models Only) ...................2-6

Fuel Operated Heater (FOH) (Van Models Only) ....2-8

Engine Coolant Heater ....................................2-8

2-1

Starting and Operating Your Vehicle

Starting the Diesel Engine

Your diesel engine starts differently than a gasoline engine.

Automatic Transmission

Move your shift lever to PARK (P) or NEUTRAL (N). Your engine won’t start in any other position — that’s a safety feature. To restart when you’re already moving, use NEUTRAL (N) only.

Notice: Do not try to shift to PARK (P) if your vehicle is moving. If you do, you could damage the transmission. Shift to PARK (P) only when your vehicle is stopped.

Manual Transmission (Pickup Models Only)

Move your shift lever to neutral and hold the clutch pedal to the ﬂoor while starting the engine. Your vehicle won’t start if the clutch pedal is not all the way down — that’s a safety feature.

Starting Your Engine

1. Turn your ignition key to RUN. Observe the wait to start light. See Wait to Start

Light on page 3-7. This light may not come on if the engine is hot.

2. As soon as the wait to start light goes off, immediately turn the ignition key to START. When the engine starts, let go of the key.

Your engine has a fast warm-up glow plug system. The wait to start light will illuminate for a much shorter time than most diesel engines, due to the rapid heating of the glow plug system.

Notice: Holding your key in START for longer than 15 seconds at a time will cause your battery to be drained much sooner. And the excessive heat can damage your starter motor.

Notice: If the wait to start light stays on after starting your vehicle, your vehicle may not run properly. Have your vehicle serviced right away.

3. If the engine does not start after 15 seconds of cranking, turn the ignition key to LOCK. Wait one minute for the starter to cool, then try the same steps again.

If you’re trying to start your engine after you’ve run out of fuel, follow the steps in Running Out of Fuel on page 5-11.

2-2

When your engine is cold, let it run for a few minutes before you move your vehicle. This lets oil pressure build up. Your engine will sound louder when it’s 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 your vehicle. Do not let your engine run when you are not in your vehicle.

Cold Weather Starting (Diesel Engine)

The following tips will help you get good starting in cold weather.

Use the recommended engine oil when the outside temperature drops below freezing. See Engine Oil on page 5-21. When the outside temperature drops below 0° F (–18°C), use of the 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 your engine coolant heater. See Engine Coolant Heater on page 2-8.

See Diesel Fuel Requirements and Fuel System on page 5-2 for information on what fuel to use in cold weather.

If Your Diesel Engine Won’t Start

If you’ve run out of fuel, look at Running Out of Fuel on page 5-11. See Diesel Fuel Requirements and Fuel System on page 5-2.

If you’re not out of fuel, and your engine won’t start, do this:

Turn your ignition key to RUN. Immediately after the wait to start light goes off, turn the ignition key to START.

If the light doesn’t go off, wait a few seconds, then try starting your engine again. See your dealer as soon as you can for a starting system check.

If the light comes on and then goes off and you know your batteries are charged, but your engine still won’t start, your vehicle needs service.

If the light does not come on when the engine is cold, your vehicle needs service.

If your batteries don’t have enough charge to start your engine, see “Battery” in the owner’s manual Index.

Be sure you have the right oil for your engine, and that you’ve changed the oil at the proper times. If you use the wrong oil, your engine may be harder to start.

2-3

Be sure you are using the proper fuel for existing weather conditions. See Diesel Fuel Requirements and Fuel System on page 5-2.

If the engine starts, runs a short time, then stops, your vehicle needs service.

{CAUTION:

Do not use gasoline or starting aids, such as ether, in the air intake. They could damage your engine. There could also be a ﬁre, which could cause serious personal injury.

Elevated Idle/Exhaust Restrictor

The engine has a cold temperature high idle and exhaust restrictor feature which elevates the engines idle speed from 680 to 1200 rpms, and restricts the exhaust gas ﬂow, when outside temperatures are below 32°F (0°C), and the engine coolant temperature is below 150°F (65°C.) This feature enhances heater performance by raising the engine coolant temperature faster.

For pickup models, this feature can be turned off and on using the DIC steering wheel control buttons. If your vehicle is not equipped with the DIC steering wheel control buttons, do the following to turn on this feature:

1. Turn the ignition to RUN, with the vehicle off.

2. Press the accelerator pedal to the ﬂoor and hold while quickly pressing the brake pedal three times in less than eight seconds.

3. Release the accelerator pedal and start the engine.

When the engine is started, it will slowly ramp up to the high idle speed after a delay of a few seconds up to approximately two minutes. For this method to work properly there must be no throttle or brake pedal faults.

The engine idle speed will return to normal once the following conditions are met:

• Once engine coolant temperature reaches

150°F (65°C).

• Air intake temperature reaches 32°F (0°C).

2-4

The high idle speed will be temporarily interrupted and the engine speed will return to normal if any of the following conditions occur:

• The brake pedal is applied.

• The accelerator pedal is pressed.

• The automatic transmission is shifted out of

PARK (P) or NEUTRAL (N).

• The clutch pedal on the manual transmission is

pressed (pickup models).

• Vehicle speed is detected.

Once these inputs are removed, the engine idle speed will slowly ramp back up to high idle after the normal delay, if the conditions for engine coolant temperature and air intake temperature are still met.

Manual High Idle System (Van Models Only)

If your vehicle has this feature, the manual high idle switch is located on the instrument panel.

This system can be used to increase your engine idle speed whenever the following conditions are met:

• The brake pedal is not pressed.

• The vehicle speed is below about 5 mph (8 km/h).

• The transmission is in NEUTRAL (N) or PARK (P).

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 may change the setting to ﬁt your needs.

2-5

Winter Cover (Pickup Models Only)

If your vehicle includes a winter cover, it will enhance heater performance and will reduce the amount of time it takes to warm the inside of your vehicle in extremely cold

conditions (below 0°F (−18°C)). The winter cover consists

of two parts, the front bumper cover (if equipped) and the grille cover. The winter cover installs over the front bumper of your vehicle and restricts the air ﬂowing to the engine compartment by covering the radiator grille.

Usage Guidelines

The winter cover should only be used while operating your vehicle in extremely cold temperatures. In these temperatures, the vehicle does not need a large amount of air to properly cool the engine. During periods of operation when more airﬂow is required to cool the vehicle, the winter cover should not be used. The following usage guidelines will allow adequate airﬂow for proper radiator grille and air cooler performance:

• Do not use the winter cover when temperatures are

expected to be above 32°F (0°C). Use of the cover in these conditions could cause your vehicle to overheat. If this happens while the cover is being used, remove the cover.

• Do not use the winter cover if towing a trailer. The

added power needed to tow a trailer requires the radiator grille to have full airﬂow under all conditions. Your vehicle may overheat if the cover is used while towing a trailer.

• Do not modify the cover. The winter cover does

not cover some sections of the front of the vehicle because these openings are needed to provide enough airﬂow to the radiator grille and air cooler in extremely cold temperatures.

2-6

• When the winter cover is used, the temperature

sensor found on the inside rearview mirror will not function properly. The temperature that is shown will be incorrect.

Installation Instructions

The following instructions explain how to install and remove your vehicle’s winter cover. When installing or removing the cover please refer to the “Usage Guidelines” mentioned previously. When you ﬁrst try to ﬁt the cover it may appear to be undersized. This is due to the nature of the special vinyl, which will stretch during installation to ensure a tight ﬁt. For this reason, the initial installation of the cover is best performed when the winter cover is warm. If you are required to use a front license plate, simply cut the black stitches on the back of the patch.

Grille Cover Installation

1. Pre-bend all the small black tabs into the shape of a J.

2. Fasten the snaps.

3. Wrap the elastic loop around the hood stopper.

4. Hook all the tabs to the edge of the grille.

5. Hook all clips to the bottom of the grille.

Lower Cover Installation

1. Pre-bend all of the small black tabs into the shape of a J.

2. Fasten each tab to edge of the bumper, as illustrated.

To remove the winter cover, reverse the steps listed previously.

2-7

Fuel Operated Heater (FOH) (Van Models Only)

If your vehicle includes a fuel operated heater (FOH), it will enhance heater performance and will reduce the amount of time it takes to warm the inside of your vehicle in cold conditions below 40°F (4.4°C). The fuel operated heater is installed in the frame rail on the driver’s side of the vehicle and uses diesel to warm up the engine coolant, which ﬁnally warms up the passenger’s cabin air. The FOH works automatically, depending on the fuel level, engine coolant temperature and outside air temperature. It works only with the engine running.

Engine Coolant Heater

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.

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, on the passenger’s side of the vehicle, near the right side engine mount.

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 110-volt AC outlet. If the cord will not reach, use a heavy-duty three-prong extension cord rated for at least 15 amps.

2-8

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. You may wish to use your coolant heater to improve ease

of starting at temperatures between 0°F (−18°C) and −20°F (−29°C).

Keep the coolant heater plugged in for

a minimum of four hours. At temperatures below −20°F (−29°C), the coolant heater should remain plugged in for

at least eight hours. It will not harm either the coolant heater or the vehicle to leave the coolant heater plugged in longer than the times stated. Be sure to remove and store the cord before starting the engine. See Diesel Fuel Requirements and Fuel System on page 5-2 for information on what fuel to use in cold weather.

2-9

✍ NOTES

2-10

Section 3 Instrument Panel

Warning Lights, Gages and Indicators ...............3-2

Instrument Panel Cluster .................................3-2

Malfunction Indicator Lamp ..............................3-4

Oil Pressure Gage ..........................................3-6

Wait to Start Light ..........................................3-7

Reduced Engine Power Light (Van Models Only) ...3-7

Fuel Gage .....................................................3-8

Water in Fuel Warning Light (Van Models Only) .....3-9

Driver Information Center (DIC)

(Pickup Models Only) ....................................3-9

3-1

Warning Lights, Gages and Indicators

Instrument Panel Cluster

United States Pickup automatic transmission version shown, manual transmission and Canada similar

3-2

United States Van version shown, Canada similar

Your instrument cluster is designed to let you know at a glance how your vehicle is running. You’ll know how fast you’re going, about how much fuel you have and many other things you’ll need to know to drive safely and economically.

3-3

Malfunction Indicator Lamp

Check Engine Light

Pickup Models

Your vehicle has a computer which monitors operation of the fuel, timing, 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.

Van Models

The check engine light comes on to indicate when 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.

Notice: If you keep driving your vehicle with this light on, after awhile, your emission controls may not work as well, your fuel economy may not be as good, and your engine may not run as smoothly. This could lead to costly repairs that may not be covered by your warranty.

Notice: Modiﬁcations made to the engine, transmission, exhaust, intake, or fuel system of your vehicle or the replacement of the original tires with other than those of the same Tire Performance Criteria (TPC) can affect your vehicle’s emission controls and may cause this light to come on. Modiﬁcations to these systems could lead to costly repairs not covered by your warranty. This may also result in a failure to pass a required Emission Inspection/Maintenance test.

3-4

If the Light Comes On

This light should come on, as a check to show you it is working, when the ignition is on and the engine is not running. If it does not, have it repaired. This light will also come on if an emission control system malfunction has been detected on your vehicle. Diagnosis and service may be required.

You also may be able to correct the emission system malfunction by considering the following:

Did you just drive through a deep puddle of water?

If so, your electrical system may be wet. The condition will usually be corrected when the electrical system dries out. A few driving trips should turn the light off.

Are you low on fuel?

As your engine starts to run out of fuel, your engine may not run as efficiently as designed since small amounts of air are sucked into the fuel line. The system can detect this. Adding fuel should correct this condition. It will take a few driving trips to turn the light off.

If none of the above steps have made the light turn off, your dealer can check the vehicle. Your dealer has the proper test equipment and diagnostic tools to ﬁx any mechanical or electrical problems that may have developed.

Emissions Inspection and Maintenance Programs

Some state/provincial and local governments have or may begin programs to inspect the emission control equipment on your vehicle. Failure to pass this inspection could prevent you from getting a vehicle registration.

Here are some things you need to know in order to help your vehicle pass an inspection:

Your vehicle will not pass this inspection if the check engine light is on or not working properly.

Your vehicle will not pass this inspection if the OBD (on-board diagnostic) system determines that critical emission control systems have not been completely diagnosed by the system. The vehicle would be considered not ready for inspection. This can happen if you have recently replaced your battery or if your battery has run down. The diagnostic system is designed to evaluate critical emission control systems during normal driving. This may take several days of routine driving. If you have done this and your vehicle still does not pass the inspection for lack of OBD system readiness, your GM dealer can prepare the vehicle for inspection.

3-5

Oil Pressure Gage

The oil pressure gage shows the engine oil pressure in psi (pounds per square inch) when the engine is running. Canadian vehicles indicate pressure in kPa (kilopascals).

Oil pressure may vary under different driving conditions and oil types. The DURAMAX oil pressure in excess of 80 psi (548 kPa) under certain conditions, especially in cold temperatures. This is a normal operating range.

engine may generate

{CAUTION:

United States

(Pickup Models)

United States

(Van Models)

3-6

Canada

(Pickup Models)

Canada

(Van Models)

Do not keep driving if the oil pressure is low. If you do, your engine can become so hot that it catches ﬁre. You or others could be burned. Check your oil as soon as possible and have your vehicle serviced.

Notice: Lack of proper engine oil maintenance may damage the engine. The repairs would not be covered by your warranty. Always follow the maintenance schedule in this manual for changing engine oil.

Wait to Start Light

Your diesel engine has a glow plug system to aid in starting your vehicle.

For pickup models, this light shows that the system is functioning properly and tells you when the engine is ready to be started. For van models, an instrument panel WAIT TO START indicator light shows that the system is functioning properly and tells you when the engine is ready to be started.

Your vehicle has a fast warm-up glow plug system. The wait to start light will illuminate for a considerably shorter time than most diesel engines due to the rapid heating of the glow plug system.

For more information, see Starting the Diesel Engine on page 2-2.

Reduced Engine Power Light (Van Models Only)

If the reduced engine power light comes on while you are driving, the computer is indicating that your vehicle has a problem. You should take your vehicle in for service soon.

3-7

Fuel Gage

Pickup Models,

United States

version shown

Pickup Models,

Canada

version shown

Van Models

When the ignition is on, the fuel gage shows you approximately how much fuel you have left in your tank. The gage will ﬁrst indicate E (empty) before you are out of fuel, but you should get more fuel as soon as possible.

Listed are four situations you may experience with your fuel gage:

• At the gas station, the fuel pump shuts off before

the gage reads F (full).

• It takes a little more or less fuel to ﬁll up than the

fuel gage indicated. For example, the gage 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 gage moves a little when you turn a corner or

speed up.

• The gage doesn’t go back to E (empty) when you

turn off the ignition.

None of these indicate a problem with the fuel gage.

For information on how to ﬁll your fuel tank, see Filling the Tank on page 5-15.

Your vehicle also has a fuel cooler. To clean, powerwash the bottom of the vehicle.

3-8

Water in Fuel Warning Light (Van Models Only)

The light will come on to warn you if there is water in the diesel fuel system.

For more information on how this light works, see Diesel Fuel Requirements and Fuel System on page 5-2.

Driver Information Center (DIC) (Pickup Models Only)

The Driver Information Center (DIC) is located on the instrument panel cluster above the steering wheel. The DIC comes on when the ignition is on. After a short delay the DIC will display the current driver and the information that was last displayed before the engine was last turned off.

If a problem is detected, a warning message will appear on the display. Pressing the select button on the DIC steering wheel buttons, or the trip odometer reset stem for vehicles without DIC steering wheel buttons, will acknowledge some current warning or service messages.

Some messages that your DURAMAX show are:

diesel may

ELEVATED IDLE OFF

This message will appear when the elevated idle/exhaust restrictor feature has been turned off. For more information on the elevated idle/exhaust restrictor feature, see Starting the Diesel Engine on page 2-2.

ELEVATED IDLE ON

This message will appear when the elevated idle/exhaust restrictor feature has been turned on. For more information on the elevated idle/exhaust restrictor feature, see Starting the Diesel Engine on page 2-2.

REDUCED ENGINE POWER

A computer monitors the operation of the electric accelerator. If the REDUCED ENGINE POWER message comes on while you are driving, the computer is indicating that your vehicle has a problem. You should take your vehicle in for service soon.

WATER IN FUEL

This message will come on to warn you if there is water in the diesel fuel system. For more information on how this message works, see Diesel Fuel Requirements and Fuel System on page 5-2.

3-9

FUEL FILTER LIFE ###%

This feature is available on vehicles with steering wheel controls. When the fuel button is pressed and FUEL FILTER LIFE appears on the display, this information will give the percentage of fuel ﬁlter life remaining.

FUEL FILTER LIFE RESET

This message will appear when a reset is performed either by using the steering wheel controls or the following manual procedure.

For vehicles with steering wheel controls, press and hold the select button for ﬁve seconds while the FUEL FILTER LIFE message is displayed. This message will appear on the DIC for ten seconds.

For vehicles without steering wheel controls, do the following:

1. Without pressing the pedals, turn the ignition key to the on position without starting the engine.

2. Wait ﬁve seconds.

3. Completely press the brake and the accelerator pedals simultaneously and hold for ten seconds. The system is now reset.

4. Turn the ignition key off.

The next time the engine is started, the message will no longer be displayed. Always reset the FUEL FILTER LIFE system after a fuel ﬁlter change.

CHANGE FUEL FILTER

This message will appear on the DIC for ten seconds when a fuel ﬁlter change is required. See Fuel Filter Replacement on page 5-12 for more information.

3-10

Section 4 Driving Your Vehicle

Towing ............................................................4-2

Towing a Trailer .............................................4-2

4-1

Towing

Towing a Trailer

When towing at high altitude on steep uphill grades, consider the following:

Engine coolant will boil at a lower temperature than sea level. 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 automatic transmission equipped vehicles in PARK (P) or manual transmission equipped vehicles in NEUTRAL with the park brake applied for at least ﬁve minutes before turning the engine off. If you do get the overheat warning, see Engine Overheating on page 5-39.

4-2

Section 5 Service and Appearance Care

Diesel Fuel Requirements and Fuel System .......5-2

Diesel Engine Fuel .........................................5-2

What Fuel to Use ...........................................5-3

Very Cold Weather Operation ...........................5-5

Water in Fuel .................................................5-5

Water in Fuel Light Chart ................................5-6

Running Out of Fuel .....................................5-11

Fuel Filter Replacement .................................5-12

Filling the Tank ............................................5-15

Filling a Portable Fuel Container .....................5-17

Checking Things Under the Hood ....................5-18

Engine Compartment Overview .......................5-18

Engine Oil ...................................................5-21

Engine Oil Life System ..................................5-24

Engine Air Cleaner/Filter ................................5-25

Automatic Transmission Fluid .........................5-29

Engine Coolant .............................................5-34

Radiator Pressure Cap ..................................5-39

Coolant Surge Tank Pressure Cap ..................5-39

Engine Overheating .......................................5-39

Cooling System ............................................5-41

Capacities and Speciﬁcations ..........................5-50

Speciﬁcation Charts ......................................5-50

5-1

Diesel Fuel Requirements and Fuel System

Some states and provinces have restrictions on the purchase of diesel fuel for light-duty vehicles and require you to buy permits or pay special taxes. Some of these restrictions apply only to residents, and others apply to both residents and visitors. These restrictions can change. To learn the current restrictions in any state or province, contact your auto club, the police or other officials.

Diesel Engine Fuel

Notice: Diesel fuel or fuel additives not recommended in this manual could damage your fuel system, fuel-operated heater (FOH) (Van models only) and engine. Your warranty would not cover this damage. And:

• Diesel fuel that has been mixed with engine oil

or automatic transmission ﬂuid could damage your engine and emission controls.

• Aftermarket diesel fuel additives are not tested

by General Motors. Some additives, particularly those which contain alcohol or water emulsiﬁers, may damage your fuel system. If you believe that unique circumstances call for a fuel additive to be used, consult your dealer for advice.

• If you ever run out of diesel fuel, it can be difficult

to restart your engine. To avoid all this, never let your tank get empty.

If gasoline is ever accidentally added to the fuel tank, to avoid severe engine damage, do not run the engine until the fuel tank can be drained.

If you run out of fuel, Running Out of Fuel on page 5-11 tells you how to restart your engine.

5-2

What Fuel to Use

In the United States, for best results use No. 2-D diesel fuel year-round (above and below freezing conditions) as oil companies blend No. 2-D fuel to address climate differences. No. 1-D diesel fuel may be used in very

cold temperatures (when it stays below 0°F or −18°C);

however, it will produce a power and fuel economy loss. Avoid the use of No. 1-D diesel fuel in warm or hot climates. It may result in stalling, poor starting when the engine is hot, and may damage the fuel injection system.

At a minimum, the diesel fuel you use should meet the latest version of ASTM speciﬁcation D 975 (Grade Low Sulfur) in the United States. In addition, the Engine Manufacturers Association (EMA) has identiﬁed properties of an improved diesel fuel for better engine performance and durability. Diesel fuels corresponding to the EMA Recommended Guideline on Premium Diesel Fuel (FQP-1A) could provide better starting, less noise, and better vehicle performance. If there are questions about the fuel you are using, contact your fuel supplier.

It is acceptable to use diesel fuel containing up to 5% biodiesel (B5), but the ﬁnal blended fuel must meet the same speciﬁcation, ASTM D 975 (Grade Low Sulfur), as other fuels used in your vehicle, and the biodiesel used for making this fuel must meet the latest version of ASTM speciﬁcation D 6751. Biodiesel is produced from vegetable oils or animal fat that have been chemically modiﬁed to reduce the possibility of damage to your fuel system and engine. Higher concentration (i.e., greater than B5) biodiesel-containing fuels or the use of unmodiﬁed bio-oils blended into diesel fuel at any concentration is not recommended and could damage your fuel system and engine. Such damage would not be covered by your warranty. If there are questions about the biodiesel-containing fuels you are using, contact your fuel supplier.

5-3

Diesel fuel may foam when you ﬁll your tank. This can cause the automatic pump nozzle to shut off, even though your tank is not full. If this happens, just wait for the foaming to stop and then continue to ﬁll your tank.

{CAUTION:

Heat coming from the engine may cause the fuel to expand and force the fuel out of your tank. If something ignites the fuel, a ﬁre could start and people could be burned. To help avoid this, ﬁll your fuel tank only until the automatic nozzle shuts off. Do not try to top it off.

What Fuel to Use in Canada

Canadian fuels are blended for seasonal changes. Diesel Type “A” fuel is blended for better cold weather starting

(below 0°F or −18°C); however, you may notice some

power and fuel economy loss. If Type “A” fuel is used in warmer temperatures, stalling and hard starting may occur. Diesel Type “B” fuel is blended for temperatures

above 0°F (−18°C). The emission control system requires

the use of diesel fuel with low-sulfur (.05% by weight) content. Both low- and higher-sulfur fuels will be available in Canada. Only low-sulfur diesel fuels are available in the United States. It is important that diesel-powered trucks are refueled only with low-sulfur fuel. Use of fuels with higher-sulfur content will affect the function of the emission components and may cause reduced performance, excessive smoke, and unpleasant odor.

At a minimum, the diesel fuel you use should meet the latest version of speciﬁcation CAN/CGSB-3.517 (Low Sulfur Diesel) in Canada. In addition, the Engine Manufacturers Association (EMA) has identiﬁed properties of an improved diesel fuel for better engine performance and durability (FQP-1A). Diesel fuels corresponding to the EMA description could provide better starting, less noise, and better vehicle performance. If there are questions about the fuel you are using, contact your fuel supplier.

5-4

It is acceptable to use diesel fuel containing up to 5% biodiesel (B5), but the ﬁnal blended fuel must meet the same speciﬁcation, CAN/CGSB-3.517 (Low Sulfur Diesel) in Canada, as other fuels used in your vehicle, and the biodiesel used for making this fuel must meet the latest version of ASTM speciﬁcation D 6751. Biodiesel is produced from vegetable oils or animal fat that have been chemically modiﬁed to reduce the possibility of damage to your fuel system and engine. Higher concentration (i.e., greater than B5) biodiesel-containing fuels or the use of unmodiﬁed bio-oils blended into diesel fuel at any concentration is not recommended and could damage your fuel system and engine. Such damage would not be covered by your warranty. If there are questions about the biodiesel-containing fuels you are using, contact your fuel supplier.

Very Cold Weather Operation

Follow the instructions listed previously under the heading “What Fuel to Use.”

Notice: Never use home heating oil or gasoline in your diesel engine. They can cause engine damage.

In cold weather, your fuel ﬁlter may become clogged (waxed). To unclog it, move the vehicle to a warm garage area and warm the ﬁlter to between 32°F and 50°F (0°C to 10°C). You will not need to replace it. Additional information on the fuel ﬁlter follows.

Water in Fuel

{CAUTION:

Diesel fuel containing water is still ﬂammable. You could be burned. If you ever try to drain water from your fuel, keep sparks, ﬂames and smoking materials away from the mixture.

Notice: If there is water in your diesel fuel and the weather is warm or humid, fungus and bacteria can grow in the fuel. They can damage your fuel system and fuel operated heater (FOH) (if equipped). A diesel fuel biocide can be used to sterilize your fuel system. However, your fuel system may still need to be cleaned. Your dealer can advise you of the appropriate solution.

If your fuel tank needs to be purged to remove water, see your dealer or a qualiﬁed technician. Improper purging can damage your fuel system and block your FOH.

Sometimes, water can be pumped into your fuel tank along with your diesel fuel. This can happen if a service station doesn’t regularly inspect and clean its fuel tanks, or if it gets contaminated fuel from its suppliers.

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If you have a pickup model and this happens, a WATER IN FUEL message will appear on the Driver Information Center (DIC). The water must be drained.

If you have a van model and this happens, this water in fuel warning light will appear on the instrument panel cluster.

The water must be drained from both chassis mounted fuel ﬁlters. Your dealer can show you how to do this.

Water in Fuel Light Chart

If the WATER IN FUEL DIC message or water in fuel warning light comes on, use this chart.

Water In Fuel Light/Message Chart

Problem Recommended Action

Light/Message comes on intermittently.

Light/Message stays on:

• At temperatures

above freezing.

• At temperatures

below freezing.

Drain water from fuel ﬁlter.

Drain fuel ﬁlter immediately. If no water can be drained and light stays on, see your dealer for assistance.

Drain fuel ﬁlter immediately. If no water can be drained — water may be frozen in water drain system. Water may be frozen in the fuel lines. Move the vehicle to a warm location to thaw out, and then drain ﬁlter system.

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