2003 GMC YUKON DENALI service

Aluminum Wheels
Keep your wheels clean using a soft clean cloth with
mild soap and water. Rinse with clean water. After
rinsing thoroughly, dry with a soft clean towel. A wax
may then be applied.
The surface of these wheels is similar
to the painted
surface of your vehicle. Don’t use strong soaps,
chemicals, abrasive polishes, abrasive cleaners,
cleaners with acid, or abrasive cleaning brushes on
them because you could damage the surface. Do not
use chrome polish on aluminum wheels.
Don’t take your vehicle through an automatic car wash
that has silicone carbide tire cleaning brushes. These
brushes can also damage the surface of these wheels.
Tires
To clean your tires, use a stiff brush with tire cleaner.
Nofice: When applying a tire dressing, always take
care to wipe
off any overspray or splash from all
painted surfaces on the body
or wheels of the
vehicle. Petroleum-based products may damage the
paint finish and tires.
Sheet Metal Damage
If your vehicle is damaged and requires sheet metal
repair or replacement, make sure the body repair shop
appiies anti-corrosion materiai to parts repaired or
replaced
to restore corrosion protection.
Original manufacturer replacement parts will provide the
corrosion protection while maintaining the warranty.
Finish Damage
Any stone chips, fractures or deep scratches in the
finish should be repaired right away. Bare metal
will corrode quickly and may develop into major repair
expense.
Minor chips and scratches can be repaired with touch-up
materials avaliable from your dealer or other service
outlets. Larger areas of finish damage can be corrected
in your dealer’s body and paint shop.
5-83

Vehicle Identification
Vehicle Identification Number (VIN)
SAMPLE4UXl M072675
This is the legal identifier for your vehicle. It appears on
a plate in the front corner of the instrument panel, on
the driver’s side. You can see it
if you look through the
windshield from outside your vehicle. The VIN also
appears on the Vehicle Certification and Service Parts
labels and the certificates of title and registration.
Engine Identification
The 8th character in your VIN is the engine code. This
code will help you identify your engine, specifications
and replacement parts.
Service Parts Identification Label
You’ll find this label located in the glove box. It’s very
helpful
if you ever need to order parts. On this label is:
your VIN,
the model designation’
paint information and
a list of all production options and special
equipment.
Be sure that this label is not removed from the vehicle.
5-86

Normal Maintenance Replacement Parts
Replacement part numbers listed in this section are based on the latest information available at the time of printing,
and are subject
to change. If a part listed in this manual is not the same as the part used in your vehicle when it was
built, or
if you have any questions, please contact your GM dealer.
These specifications are for information only.
If you have any questions, see the service manual.
I Part 1 Number I
Oil Filter
G F626"
Fuel Filter 41
-974*
/ PZTR5A15t
Spark Plugs cv2001
-c* PCV Valve" AI
51 8C*
Engine Air CleanedFilter P F44*
Wiper Blades (Front)
ITTA
Wiper Blade Tvpe (Front)
151 53642**
Wiper Blade Length (Front)
ITTA WiDer Blade Tvpe (Rear) 221
54396**
Wiper Blades (Rear) 22.0
inches (56.0 cm) a. I
Wiper Blade Length (Rear) 18.0 inches (45.0 cm)
*ACDelco@ Part
No.
**GM Part No.
tNGK
5-98

Section 6 Maintenance Schedule
Maintenance Schedule ...................................... 6.2
Introduction
................................................... 6.2
Your Vehicle and the Environment
.................... 6-2
Maintenance Requirements
.............................. 6.2
How This Section is Organized
......................... 6-3
Part A: Scheduled Maintenance Services
........... 6-4
Using Your Maintenance Schedule
.................... 6-4
Scheduled Maintenance
................................... 6-5
Part
B: Owner Checks and Sewices ................ 6-10
At Each Fuel Fill
.......................................... 6-10
At Least Once a Month
................................. 6-10
At Least Twice a Year
................................... 6-10
~~
At Least Once a Year ................................... 6.11
Part C: Periodic Maintenance Inspections
......... 6.14
Steering and Suspension Inspection
................ 6.14
Exhaust System Inspection
............................ 6.14
Fuel System Inspection
.................................. 6.14
Engine Cooling System Inspection
................... 6.14
Drive) Inspection
....................................... 6.14
Brake System Inspection
................................ 6.14
Part D: Recommended Fluids and Lubricants
.... 6.15
Part E: Maintenance Record
........................... 6.17
Transfer Case and Front
Axle (All-Wheel
6- 1

How This Section is Organized
This maintenance schedule is divided into five parts:
“Part
A: Scheduled Maintenance Services” explains
what
to have done and how often. Some of these
services can be complex,
so unless you are technically
qualified and have the necessary equipment, you
should let your dealer’s service department or another
qualif
i service center do these jobs.
Performing maintenance work on a venicle can
be dangerous. In trying to do some jobs, you
can be seriously injured.
Do --- your own 1
If you want to get the service information, see Service
Publications Ordering Information on page
7- IO.
“Part B: Owner Checks and Services” tells you what
should
be checked and when. It also explains what
you can easily do
to help keep your vehicle in good
condition.
“Part
C: Periodic Maintenance Inspections” explains
important inspections that your dealer’s service
department or another qualified service center should
perform.
“Part
D: Recommended Fluids and Lubricants” lists
some recommended products necessary
to help
keep your vehicle properly maintained. These products,
or their equivalents, should be used whether you do
the work yourself or have it done.
maintenance work only
if you have the
required know-how and the proper tools and “Part E: Maintenance Record”
is a place for you to
equipment for the job. If you have any doubt, record
and keep track of the maintenance performed on
your vehicle. Keep your maintenance receipts. They
have a qualified technician do the work. may be needed
to qualify your vehicle for warranty 1 repairs.
6-3

Part A: Scheduled Maintenance
Services
This part contains engine oil and chassis lubrication
scheduled maintenance which explains the engine oil life
system and how it indicates when
to change the
engine oil and filter. Lubricate chassis components with
each oil change.
Also, listed are scheduled maintenance
services which are to be performed at the mileage
intervals specified.
Using Your Maintenance Schedule
We at General Motors want to help you keep your
vehicle in good working condition. But we don’t know
exactly how you’ll drive it. You may drive very short
distances only a few times a week. Or you may drive
long distances all the time in very hot, dusty weather.
You may use your vehicle in making deliveries. Or
you may drive it to work,
to do errands or in many
other ways.
Because of all the different ways people use their
vehicles, maintenance needs vary. You may need more
frequent checks and replacements.
So please read
the following and note how you drive. If you have any
questions on how to keep your vehicle in good condition,
see your dealer. This part tells you
the maintenance services you should
have done and when you should schedule them.
When you go
to your dealer for your service needs,
you’ll know that GM-trained and supported service
people will perform the work using genuine GM parts.
The proper fluids and lubricants
to use are listed in
Part
D. Make sure whoever services your vehicle uses
these.
All parts should be replaced and all necessary
repairs done before you or anyone else drives the
vehicle.
This schedule is for vehicles that:
carry passengers and cargo within recommended
limits. You will find these limits on your vehicle’s
Certificationflire label. See Loading Your Vehicle
on
page 4-44.
are driven on reasonable road surfaces within legal
driving limits.
are driven off-road in the recommended manner.
See Operating Your All- Wheel-Drive Vehicle
Off
Paved Roads on page 4- 16.
use the recommended fuel. See Gasoline Octane
on page 5-5.
6-4

Scheduled Maintenance
The services shown in this schedule up to 100,000 miles
(1 66 000 km) should be repeated after 100,000 miles
(166
000 km) at the same intervals for the life of
this vehicle. The services shown at
150,000 miles
(240 000 km) should be repeated at the same interval
after 150,000 miles
(240 000 km) for the life of this
vehicle.
See Part B: Owner Checks and Services
on page 6- 10
and Part C: Periodic Maintenance Inspections on
page 6- 14.
Footnotes
t The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to
the completion of the vehicle
s useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded.
+ A good time to check your brakes is during tire
rotation. See Brake System Inspection
on page 6-14.
Engine Oil and Chassis Lubrication
Scheduled Maintenance
Change engine oil and filter as indicated by the GM
Oil Life System (or every 12 months, whichever
occurs first). Reset the system.
Your vehicle has a computer system that lets you know
when
to change the engine oil and filter. This is
based on engine revolutions and engine temperature,
and not on mileage. Based on driving conditions,
the mileage at which an oil change will be indicated can
vary considerably. For the oil life system
to work
properly, you must reset the system every time the oil is
changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A CHANGE ENGINE
OIL message will
come on. Change your oil as soon as possible within
the next two times you stop for fuel.
It is possible that, if
you are driving under the best conditions, the oil life
system may not indicate that an oil change is necessary
for over a year. However, your engine oil and filter
must be changed at least once a year and at this time
the system must be reset.
It is also important to
check your oil regularly and keep it at the proper level.
6-5

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. See Engine Oil on
page
5-13 for 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 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.
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)
U Check rear/front axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.
page
5-56 for proper rotation pattern and additional
information. (See footnote
+.)
0 Rotate tires. See Tire Inspection and Rotation on
15,000 Miles (25 000 km)
17 Check readfront axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.
page
5-56 for proper rotation pattern and additional
information. (See footnote
+.)
0 Rotate tires. See Tire lnspection and Rotation on
22,500 Miles (37 500 km)
0 Check readfront axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.
page
5-56 for proper rotation pattern and additional
information. (See footnote
+.)
CI Rotate tires. See Tire Inspection and Rotation on
30,000 Miles (50 000 km)
3 Check readfront axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.
page
5-56 for proper rotation pattern and additional
information. (See footnote
+.)
(See footnote t.)
U Rotate tires. See Tire Inspection and Rotation on
U Replace fuel filter. An Emission Control Service.
6-6