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Engine Coolant Temperature Gage
This gage shows the engine coolant temperature.
If the gage pointer moves into the red area,
your engine coolant might have overheated and
your engine may be too hot. You should pull off the
road, stop your vehicle and turn off the engine
as soon as possible.
SeeEngine Overheating on page 288. If you have
a Caterpillar
®diesel engine, also see your
Caterpillar®Operation & Maintenance Manual.
Low Coolant Warning Light
You have a low coolant
warning light. If this light
comes on, your system
is low on coolant and the
engine may overheat.
The warning light should come on briefly, as a
check, when you turn on the ignition.
When it comes on, you will also hear a warning
tone at several beats per second for 10 seconds.
SeeEngine Coolant (Gas and DURAMAX
®/Isuzu
Engines) on page 284orEngine Coolant
(Caterpillar
®Diesel Engines) on page 287and
have your vehicle serviced as soon as you can.
This light may also come on if your vehicle is
equipped with the automatic engine shutdown
system and engine shutdown has begun.
SeeEngine Alarm and Automatic Shutdownunder
Starting the Diesel Engine on page 100.
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Oil Pressure Gage
The engine oil pressure gage, on the lower right
portion of your instrument panel cluster, shows
engine oil pressure in psi (pounds per square inch)
or in kPa (kilopascals). Oil pressure may vary
with outside temperature and oil viscosity,
but readings of 30 to 40 psi (205 to 275 kPa) on
gasoline engines at operating temperature
and moderate road speeds are normal. If you
have a diesel engine, the normal operating range
should be between 35 and 70 psi (240 to 480 kPa).A reading in the low pressure zone may be
caused by a dangerously low oil level or other
problem.
If you have a Caterpillar
®diesel engine, also see
your Caterpillar®Operation & Maintenance
Manual.
{CAUTION:
Do not keep driving if the oil pressure is
low. If you do, your engine can become so
hot that it catches re. 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.
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Low Oil Level Light
Your vehicle may have
a low oil level light.
This light should come on as a check, when you
start your engine. If the light fails to come on, have
it repaired as soon as possible so you will be
aware when the oil level is low.
Vehicles that have Caterpillar
®diesel engines may
not have a low oil level light. In this case, the light
will neither come on as a check when you start your
engine, nor will it come on to indicate a low oil level.
If this light comes on and stays on, it means your
engine is low on oil. You need to check the oil level
right away. SeeEngine Oil (Caterpillar
®DieselEngine) on page 268orEngine Oil (Gasoline
Engine) on page 268orEngine Oil (DURAMAX
®/
Isuzu Diesel Engine) on page 272for further
information.
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.
Change Engine Oil Light
The change engine oil
light should come on
briefly as a bulb
check when you start
the engine. If the
light does not come on,
have it serviced.
If the change engine oil light comes on and stays
on after you start the engine, have the oil
changed.
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For additional information on when to change
engine oil for gasoline engines or DURAMAX®
diesel engines, seeEngine Oil (Caterpillar®Diesel
Engine) on page 268orEngine Oil (Gasoline
Engine) on page 268orEngine Oil (DURAMAX
®/
Isuzu Diesel Engine) on page 272andScheduled
Maintenance on page 363. To reset the change
engine oil light, seeEngine Oil Life System
(Gasoline Engine) on page 276orEngine Oil Life
System (DURAMAX
®Diesel) on page 278or
Engine Oil Life System (Caterpillar®Diesel Engine)
on page 279.
Engine Overspeed Warning Light
If your vehicle has this
light, it will come on if
your engine is operating
at too many revolutions
per minute (rpm).
It will also come on for a moment as a check
when you start your engine.
If it comes on when you’re driving, reduce your
engine speed immediately.
Engine Shutdown Warning Light
If your vehicle has the
engine shutdown
feature, this light will
come on when engine
shutdown is active.
For more information, seeEngine Alarm and
Automatic ShutdownunderStarting the Diesel
Engine on page 100.
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Fuel Gage
Your fuel gage is
located on the right side
of your instrument
panel cluster.
When the ignition is on, your fuel gage lets you
know about how much fuel you have left. When the
gage first shows empty, you’ll still have a little fuel
left, but you should get more fuel soon.
If your vehicle has dual fuel tanks, the reading on
the gage is the total fuel left in both tanks.Here are four concerns of some operators. None
of these shows a problem with your fuel gage:•The gage moves a little when you turn a
corner or speed up.
•The gage does not go back to empty when
you turn off the ignition.
•At the gas station, the pump shuts off before
the gage reads full.
•It takes a little more or less fuel to fill up than
the gage indicated.
If you have a Caterpillar
®diesel engine, also see
your Caterpillar®Operation & Maintenance
Manual.
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Water in Fuel Warning Light
This light is located
above the climate
controls in the center of
the instrument panel.
If your vehicle has the 6.6L DURAMAX
®or Isuzu
6H diesel engine, this light will come on to
warn you that there is water in the fuel system.
For more information on how this light works, see
Water in Fuel on page 256.
Air Filter Restriction Indicator
If your vehicle has this
feature, the gage is
located above the
switchbank in the center
of the instrument
panel. It monitors the
engine air filter.
As the filter gets dirty, the yellow indicator will
begin to rise. When it reaches 25 inches of
vacuum on the scale, the filter should be replaced.
After replacing the filter, reset the gage by
pressing in the yellow reset button at the bottom
of the gage.
If you have a Caterpillar
®diesel engine, also see
your Caterpillar®Operation & Maintenance Manual.
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Appearance Care........................................ 331
Cleaning the Inside of Your Vehicle.......... 331
Fabric/Carpet............................................. 333
Instrument Panel, Vinyl, and Other
Plastic Surfaces..................................... 334
Care of Safety Belts.................................. 334
Weatherstrips............................................ 334
Washing Your Vehicle............................... 335
Cleaning Exterior Lamps/Lenses................ 335
Finish Care............................................... 335
Windshield and Wiper Blades.................... 336
Aluminum or Chrome-Plated Wheels......... 337
Tires......................................................... 337
Sheet Metal Damage................................. 337
Finish Damage.......................................... 338
Underbody Maintenance............................ 338
Chemical Paint Spotting............................ 338Vehicle Identi cation.................................. 340
Vehicle Identification Number (VIN)........... 340
Service Parts Identification Label............... 340
Electrical System........................................ 340
Add-On Electrical Equipment..................... 340
Headlamp Wiring....................................... 341
Windshield Wiper Fuses............................ 341
Fusible Links............................................. 341
Power Windows and Other Power
Options.................................................. 341
Fuses and Circuit Breakers....................... 341
Instrument Panel Fuse Block..................... 342
Underhood Fuse Block.............................. 344
Capacities and Speci cations.................... 347
Normal Maintenance Replacement Parts..... 352
Engine Drive Belt Routing......................... 355
Section 5 Service and Appearance Care
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Doing Your Own Service Work
{CAUTION:
You can be injured and your vehicle could
be damaged if you try to do service work
on a vehicle without knowing enough
about it.
Be sure you have sufficient knowledge,
experience, the proper replacement
parts, and tools before you attempt any
vehicle maintenance task.
Be sure to use the proper nuts, bolts,
and other fasteners. English and metric
fasteners can be easily confused. If you
use the wrong fasteners, parts can later
break or fall off. You could be hurt.If you want to do some of your own service work,
you will want to use the proper service manual.
It tells you much more about how to service your
vehicle than this manual can. To order the
proper service manual, seeService Publications
Ordering Information on page 415.
Your vehicle has an airbag system. Before
attempting to do your own service work, see
Servicing Your Airbag-Equipped Vehicle on
page 80.
You should keep a record with all parts receipts
and list the mileage and the date of any service
work you perform. SeePart D: Maintenance
Record on page 400.
249