2006 CHEVROLET DURAMAX radiator cap

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.....................5-17Checking 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 Specications..........................5-50
Specification Charts......................................5-50
Section 5 Service and Appearance Care
5-1
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Checking Coolant
The coolant surge tank
is located in the engine
compartment on the
passenger’s side of the
vehicle. SeeEngine
Compartment Overview
on page 5-18for more
information on its location.
{CAUTION:
Turning the surge tank pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids to blow out and burn you
badly. Never turn the surge tank pressure
cap — even a little — when the engine and
radiator are hot.The vehicle must be on a level surface. When your
engine is cold, the coolant level should be at the
FULL COLD mark.
Adding Coolant
If you need more coolant, add the proper DEX-COOL®
coolant mixtureat the surge tank, but only when the
engine is cool. If the surge tank is empty, seeEngine
Overheating on page 5-39.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
When replacing the pressure cap, make sure it is
hand- tight.
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If you have to add coolant more than four times a year,
have your dealer check your cooling system.
Notice:If you use extra inhibitors and/or additives
in your vehicle’s cooling system, you could damage
your vehicle. Use only the proper mixture of the
engine coolant listed in this manual for the cooling
system. SeeRecommended Fluids and Lubricants
on page 6-15for more information.
Checking Coolant
The coolant recovery tank
is located near the center
of the engine compartment.
SeeEngine Compartment
Overview on page 5-18
for more information on
its location.
{CAUTION:
Turning the radiator pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids to blow out and burn you
badly. With the coolant recovery tank, you will
almost never have to add coolant at the
radiator. Never turn the radiator pressure
cap — even a little — when the engine and
radiator are hot.
The vehicle must be on a level surface. When your
engine is cold, the coolant level should be at the
COLD FILL mark.
5-38
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Adding Coolant
If you need more coolant, add the proper DEX-COOL®
coolant mixtureat the coolant recovery tank, but be
careful not to spill it.
{CAUTION:
You can be burned if you spill coolant on hot
components in the engine compartment.
Coolant contains ethylene glycol, and it will
burn if the engine parts are hot enough. Do not
spill coolant on a hot engine or components in
the engine compartment.
When replacing the pressure cap, make sure it is
hand-tight.
Radiator Pressure Cap
The radiator pressure cap must be tightly installed.
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.
Coolant Surge Tank Pressure Cap
The surge tank pressure
cap must be tightly
installed.
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.
Engine Overheating
You will find an engine coolant temperature gage on the
instrument panel cluster. For pickup models, the ENGINE
OVERHEATED message may appear in the Driver
Information Center (DIC). See your owner’s manual for
more information.
5-39
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The coolant level should
be at or above the FULL
COLD mark. If it isn’t, you
may have a leak at the
pressure cap or in the
radiator hoses, heater
hoses, radiator, water
pump or somewhere
else in the cooling system.
{CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Do not touch them. If
you do, you can be burned.
Do not run the engine if there is a leak. If you
run the engine, it could lose all coolant. That
could cause an engine re, and you could be
burned. Get any leak xed before you drive
the vehicle.If there seems to be no leak, start the engine again. If
your vehicle is equipped with an engine driven cooling
fan, the engine cooling fan speed should increase when
idle speed is doubled by pushing the accelerator pedal
down. If it doesn’t, your vehicle needs service. Turn off
the engine.
Notice:Engine damage from running your engine
without coolant is not covered by your warranty.
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 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.
5-42
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Notice:In cold weather, water can freeze and crack
the engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mixture.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
Park the vehicle on a level
surface. You can remove
the coolant surge tank
pressure cap when the
cooling system, including
the coolant surge tank
pressure cap and upper
radiator hose, is no
longer hot.
1. Turn the pressure cap slowly counterclockwise (left)
until it first stops. Don’t press down while turning the
pressure cap. If you hear a hiss, wait for that to stop.
A hiss means there is still some pressure left.2. Then keep turning the cap, but now push down as
you turn it. Remove the pressure cap.
3. After the engine cools, open the air bleed valve on
the thermostat housing.
Fill with the proper mixture. Add coolant until you
see a steady stream of coolant coming from the
bleed valve.
4. Close the bleed valve.
5. Rinse or wipe the spilled coolant from the engine
and compartment.
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6. Then fill the coolant surge tank with the proper
mixture, to slightly above the fill mark.7. With the coolant surge tank pressure cap off, start
the engine and let it run until you can feel the upper
radiator hose getting hot. Watch out for the engine
cooling fan.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower, add
more of the proper mixture to the coolant surge tank
until the level reaches the FULL COLD mark.
8. Then replace the pressure cap.
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Van Models
When you decide it is safe to lift the hood, here is what
you will see:
A. Coolant Surge Tank
B. Coolant Surge Tank Pressure Cap
C. Engine Cooling Fan
If the coolant inside the coolant surge tank is boiling,
do not do anything else until it cools down.When the engine is cold,
the coolant level should
be at or above the
COLD FILL mark.
If it is not, you may have a leak at the pressure cap or in
the radiator hoses, heater hoses, radiator, water pump,
fuel operated heater (FOH) or somewhere else in the
cooling system.
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