5-16 GMC YUKON 2003 Owner's Manual

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 with engine speed, outside
temperature and oil viscosity, but readings above the
low pressure zone indicate the normal operating range.A reading in the low pressure zone may be caused by a
dangerously low oil level or some other problem
causing low oil pressure. Check your oil as soon as
possible. SeeOil Pressure LowunderDIC Warnings
and Messages on page 3-64andEngine Oil on
page 5-16.
{CAUTION:
Don’t keep driving if the oil pressure is low. If
you do, your engine can become so hot that it
catchesre. You or others could be burned.
Check your oil as soon as possible and have
your vehicle serviced.
Notice:Damage to your engine from neglected oil
problems can be costly and is not covered by
your warranty. United States
Canada
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2003 - Yukon/Yukon XL

Average Fuel Economy
Press the fuel information button until AVG appears in
the display. Average fuel economy is how many
miles per gallon your vehicle is getting based on current
and past driving conditions.
Press and hold the select button while AVG.ECON is
displayed to reset the average fuel economy. Average
fuel economy will then be calculated starting from
that point. If the average fuel economy is not reset, it
will be continually updated each time you drive.
Instant Fuel Economy
Press the fuel information button until INST appears in
the display. Instant fuel economy is how many miles
per gallon your vehicle is at the particular moment
in time. The instant fuel economy cannot be reset.
GM Oil Life System™
Press the fuel information button until ENGINE OIL LIFE
appears in the display. The GM Oil Life System™
shows an estimate of the oil’s remaining useful life. It
will show 100% when the system is reset after an
oil change. It will alert you to change your oil on a
schedule consistent with your driving conditions.Always reset the engine oil life after and oil change. To
reset the Oil Life System press and hold the select
button while ENGINE OIL LIFE is displayed. OIL LIFE
RESET will appear on the display for 10 seconds
to let you know the system is reset.
The DIC does not replace the need to maintain your
vehicle as recommended in the Maintenance Schedule
in this manual. Also, the oil change reminder does
not measure how much oil you have in your engine. So,
be sure to check your oil level often. SeeEngine Oil
on page 5-16.
Personalization Button
You can program certain features to a preferred setting
for up to two people. Press the personalization button
to scroll through the following personalization features.
All of the personalization options may not be available
on your vehicle. only the options available will be
displayed on your DIC.
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2003 - Yukon/Yukon XL

If you accidentally choose a language that you don’t
want or understand, press and hold the personalization
button and the trip information button at the same
time. The DIC will begin scrolling through the languages
in their particular language. English will be in English,
French will be in French and so on. When you see
the language that you would like, release both buttons.
The DIC will then display the information in the
language you chose.
Select Button
The select button is used to reset certain functions and
turn off or acknowledge messages on the DIC display.
The select button also toggles through the options
available in each personalization menu. For example, this
button will reset the trip odometers, turn off the FUEL
LEVEL LOW message, and toggle through the languages
you can select the DIC to display information in.
DIC Warnings and Messages
Warning messages are displayed on the DIC to notify
the driver that the status of the vehicle has changed and
that some action may be needed by the driver to
correct the condition. If there is more than one message
that needs to be displayed they will appear one after
another. Some messages may not require immediate
action but you should press the select button to
acknowledge that you received the message and clear itfrom the display because they are more urgent. These
messages require action before they can be removed
from the DIC display. The following are the possible
messages that can be displayed and some information
about them.
CHANGE ENGINE OIL
This message is displayed when the engine oil needs to
be changed.
When you change the engine oil, be sure to reset the
CHANGE ENGINE OIL message. SeeEngine Oil, When
to ChangeunderEngine Oil on page 5-16.
LOW COOLANT LEVEL
If the engine coolant level is low, this message will
appear on the DIC. Adding coolant will clear the
message.
ENGINE COOLANT HOT
If the cooling system temperature gets hot, this message
will appear in the DIC. Stop the vehicle and let the
engine idle in PARK (P) to allow the coolant to reach a
safe temperature. This message will clear when the
coolant temperature drops to safe operating
temperature.
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2003 - Yukon/Yukon XL

Service............................................................5-3
Doing Your Own Service Work.........................5-3
Adding Equipment to the Outside of Your
Vehicle......................................................5-4
Fuel................................................................5-4
Gasoline Octane............................................5-4
Gasoline Specifications....................................5-4
California Fuel...............................................5-5
Additives.......................................................5-5
Fuel E-85 (85% Ethanol).................................5-6
Fuels in Foreign Countries...............................5-7
Filling Your Tank............................................5-7
Filling a Portable Fuel Container.....................5-10
Checking Things Under
the Hood....................................................5-10
Hood Release..............................................5-11
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-16
Engine Air Cleaner/Filter................................5-21
Automatic Transmission Fluid.........................5-23
Engine Coolant.............................................5-26
Coolant Surge Tank Pressure Cap..................5-29Engine Overheating.......................................5-29
Cooling System............................................5-32
Engine Fan Noise.........................................5-37
Power Steering Fluid.....................................5-38
Windshield Washer Fluid................................5-39
Brakes........................................................5-40
Battery........................................................5-43
Jump Starting...............................................5-44
All-Wheel Drive..............................................5-49
Rear Axle.......................................................5-50
Four-Wheel Drive............................................5-51
Front Axle......................................................5-52
Bulb Replacement..........................................5-52
Halogen Bulbs..............................................5-53
Headlamps..................................................5-53
Front Turn Signal, Sidemarker and Daytime
Running Lamps.........................................5-54
Side Identification Marker Lamps.....................5-55
Roof Marker Lamps......................................5-55
Taillamps.....................................................5-57
Replacement Bulbs
.......................................5-59
Section 5 Service and Appearance Care
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2003 - Yukon/Yukon XL

Engine Oil
If the CHECK OIL LEVEL message appears on the
instrument cluster, it means you need to check
your engine oil level right away.
For more information, see“CHECK OIL LEVEL”under
DIC Warnings and Messages on page 3-64.
You should check your engine oil level regularly; this is
an added reminder.
Checking Engine Oil
It’s a good idea to check your engine oil every time you
get fuel. In order to get an accurate reading, the oil
must be warm and the vehicle must be on level ground.The engine oil dipstick has a yellow ring handle and is
located in the engine compartment on the passenger’s
side of the vehicle. SeeEngine Compartment Overview
on page 5-12for more information on location.
Turn off the engine and give the oil several minutes to
drain back into the oil pan. If you don’t, the oil
dipstick might not show the actual level.
Pull out the dipstick and clean it with a paper towel or
cloth, then push it back in all the way. Remove it again,
keeping the tip down, and check the level.
8.1L Engine
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2003 - Yukon/Yukon XL

Cooling System Capacity
ApplicationCapacities
English Metric
Cooling System
VORTEC™4800 V8 Automatic with front A/C 14.4 quarts 13.6 L
VORTEC™4800 V8 Automatic with front and rear A/C 15.8 quarts 15.0 L
VORTEC™5300 V8 Automatic with front A/C 14.4 quarts 13.6 L
VORTEC™5300 V8* Automatic with front and rear A/C 15.8 quarts 15.0 L
VORTEC™6000 V8 Automatic 15.8 quarts 15.0 L
VORTEC™6000 V8** Automatic with engine oil cooler 15.4 quarts 14.6 L
VORTEC™8100 V8 Automatic 20.7 quarts 19.6 L
*Vehicles equipped with the optional air conditioner.
**Vehicles equipped with the optional engine oil cooler.
Add one liter if equipped with rear heating for all engines.
After refill, the level must be rechecked. Add enough engine oil so that thefluid is within the proper operating range.
SeeEngine Oil on page 5-16.
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2003 - Yukon/Yukon XL

If the system is ever reset accidentally, you must
change your oil at 3,000 miles (5 000 km) since your
last oil change. Remember to reset the oil life system
whenever the oil is changed. SeeEngine Oil on
page 5-16for information on resetting the system.
An Emission Control Service.
Lubricate chassis components with each engine oil
and filter change.
Lubricate the front suspension, ball joints, steering
linkage, transmission shift linkage, transfer case shift
linkage and parking brake cable guides. Ball joints
should not be lubricated unless their temperature is
10°F(−12°C) or higher, or they could be damaged.
See the mileage intervals following for additional
services that may be performed with an engine oil
change and chassis lubrication. After the services are
performed, record the date, odometer reading and
who performed the service on the maintenance record
pages in Part E of this schedule.7,500 Miles (12 500 km)
❑Check rear/front axlefluid level and addfluid as
needed. Check constant velocity joints and axle seals
for leaking.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-61for proper rotation pattern and additional
information.(See footnote +.)
15,000 Miles (25 000 km)
❑Inspect engine air cleanerfilter or change indicator (if
equipped). If necessary, replace thefilter. If vehicle is
driven in dusty/dirty conditions, inspectfilter or
change indicator (if equipped) at every engine oil
change. SeeEngine Air Cleaner/Filter on page 5-21
for more information.An Emission Control Service.
(See footnote†.)
❑Check rear/front axlefluid level and addfluid as
needed. Check constant velocity joints and axle seals
for leaking.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-61for proper rotation pattern and additional
information.(See footnote +.)
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2003 - Yukon/Yukon XL

Part B: Owner Checks and Services
Listed in this part are owner checks and services
which should be performed at the intervals specied to
help ensure the safety, dependability and emission
control performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever anyuids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
in Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuelfill.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-16for further
details.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-26for further details.
Windshield Washer Fluid Level Check
Check the windshield washeruid level in the windshield
washer tank and add the properuid if necessary.
SeeWindshield Washer Fluid on page 5-39for further
details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inated to the correct pressures.
Don’t forget to check your spare tire. SeeTires on
page 5-60for further details.
Cassette Tape Player Service
Clean cassette tape player. Cleaning should be done
every 50 hours of tape play. SeeAudio System(s)
on page 3-71for further details.
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Part D: Recommended Fluids and
Lubricants
Fluids and lubricants identied below by name, part
number or specication may be obtained from your
dealer.
Usage Fluid/Lubricant
Engine OilEngine oil with the American
Petroleum Institute Certied for
Gasoline Engines starburst symbol
of the proper viscosity. To determine
the preferred viscosity for your
vehicle’s engine, seeEngine Oil on
page 5-16.
Engine Coolant50/50 mixture of clean, drinkable
water and use only
DEX-COOL
®Coolant. SeeEngine
Coolant on page 5-26.
Hydraulic Brake
SystemDelco Supreme 11 Brake Fluid or
equivalent DOT-3 brakeuid.
Windshield
Washer SolventGM Optikleen
®Washer Solvent or
equivalent.
Power Steering
SystemGM Power Steering Fluid (GM Part
No. U.S. 1052884, in Canada
993294, or equivalent).
Automatic
TransmissionDEXRON
®-III Automatic
Transmission Fluid.
Usage Fluid/Lubricant
Key Lock
CylindersMulit-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474, or equivalent).
Chassis
LubricationChassis Lubricant (GM Part No.
U.S. 12377985, in Canada
88901242, or equivalent) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Front Axle
(Four-Wheel
Drive)SAE 80W-90 Axle Lubricant
(GM Part No. U.S. 1052271, in
Canada 10950849 or equivalent).
Front Axle
(All-Wheel
Drive)SAE 75W-90 Synthetic Axle
Lubricant (GM Part No. U.S.
12378261, in Canada 10953455) or
equivalent meeting GM Specication
9986115.
Rear AxleSAE 75W-90 Synthetic Axle
Lubricant (GM Part No. U.S.
12378261, in Canada 10953455) or
equivalent meeting GM Specication
9986115.
Rear Axle
(Steerable)Synthetic Axle Lubricant; use only
GM Part No. 12378557 (in Canada
88901362). Do not add friction
modier.
Transfer Case
(All-Wheel
Drive with
Stabilitrak
®)Dexron-III Automatic Transmission
Fluid.
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2003 - Yukon/Yukon XL

C
California Fuel.................................................. 5-5
Canada........................................................... 7-4
Canadian Owners................................................ ii
Canadian Roadside Assistance........................... 7-7
Capacities and Specifications..........................5-106
Car Washes for QUADRASTEER™Equipped
Vehicles.....................................................4-19
Carbon Monoxide...................4-47, 4-61, 2-12, 2-38
Care of
Safety Belts................................................5-91
Your Cassette Tape Player..........................3-124
Your CD and DVD Player...........................3-125
Your CDs and DVDs ..................................3-125
Cargo Cover..................................................2-57
Cargo Tie Downs............................................2-57
Cassette Tape Messages.................................3-94
Cassette Tape Player Service...........................6-11
CD Adapter Kits.............................................3-95
Center Console Storage Area...........................2-54
Center Instrument Panel Fuse Block................5-100
Center Passenger Position, Safety Belts.............1-36
Chains, Tires..................................................5-68
CHANGE ENGINE OIL
....................................3-64
Check
Engine Light
...............................................3-48
Check Engine Light
.........................................3-48
CHECK OIL LEVEL
.........................................3-68
CHECK WASHER FLUID
.................................3-68Checking Brake Fluid......................................5-41
Checking Coolant............................................5-28
Checking Engine Oil........................................5-16
Checking Things Under the Hood......................5-10
Checking Your Restraint Systems......................1-86
Chemical Paint Spotting...................................5-94
Child Restraints
Child Restraint Systems...............................1-50
Infants and Young Children...........................1-46
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-58
Older Children.............................................1-44
Securing a Child Restraint Designed for the
LATCH System........................................1-61
Securing a Child Restraint in a Center Rear
Seat Position...........................................1-64
Securing a Child Restraint in a Rear Outside
Seat Position...........................................1-61
Securing a Child Restraint in the Center Front
Seat Position...........................................1-66
Securing a Child Restraint in the Right Front
Seat Position...........................................1-66
Top Strap...................................................1-54
Top Strap Anchor Location............................1-55
Where to Put the Restraint
...........................1-53
Chime Level Adjustment
.................................3-126
Cigarette Lighter
.............................................3-21
Cleaning
Inside of Your Vehicle
..................................5-89
Outside of Your Vehicle
................................5-92
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2003 - Yukon/Yukon XL