GMC YUKON DENALI 2003 Owners Manual

Notice: Machine compounding or aggressive
polishing on
a basecoatklearcoat paint finish may
dull the finish or leave swirl marks.
Foreign materials such as calcium chloride and other
salts, ice melting agents, road oil and tar, tree sap, bird
droppings, chemicals from industrial chimneys, etc.,
can damage your vehicle’s finish
if they remain
on painted surfaces. Wash the vehicle as soon as
possible.
If necessary, use non-abrasive cleaners that
are marked safe for painted surfaces
to remove
foreign matter.
Exterior painted surfaces are subject
to aging, weather
and chemical fallout that can take their
toll over a
period of years. You can help
to keep the paint finish
looking new by keeping your vehicle garaged or covered
whenever possible.
Protecting Exterior Bright Metal Parts
Bright metal parts should be cleaned regularly to keep
their luster. Washing with water is all that is usually
needed. However, you may use chrome polish
on
chrome or stainless steel trim, if necessary. Use
special care with aluminum trim.
To avoid damaging
protective trim, never use auto or chrome polish,
steam or caustic soap
to clean aluminum. A coating of
wax, rubbed
to high polish, is recommended for all
bright metal parts.
Windshield, Backglass and Wiper
Blades
If the windshield is not clear after using the windshield
washer, or
if the wiper blade chatters when running,
wax, sap or other material may be on the blade or
windshield.
Clean the outside of the windshield with a full-strength
glass cleaning liquid. The windshield is clean
if beads do
not form when you rinse it with water.
Grime from the windshield will stick
to the wiper blades
and affect their performance. Clean the blade by
wiping vigorously with a cloth soaked in full-strength
windshield washer solvent. Then rinse the blade
with water.
Check the wiper blades and clean them as necessary; replace blades that look worn.
5-82

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

Underbody Maintenance
Chemicals used for ice and snow removal and dust
control can collect on the underbody. If these are not
removed, accelerated corrosion (rust) can occur on
the underbody parts such as fuel lines, frame, floor pan
and exhaust system even though they have corrosion protection.
At least every spring, flush these materials from the
underbody with plain water. Clean any areas where mud
and debris can collect. Dirt packed in close areas of
the frame should be loosened before being flushed. Your dealer or an underbody car washing system can
do this for you.
Chemical Paint Spotting
Some weather and atmospheric conditions can create a
chemical fallout. Airborne pollutants can fall upon and
attack painted surfaces
on your vehicle. This damage
can take two forms; blotchy, ringlet-shaped
discolorations, and small irregular dark spots etched into
the paint surface.
Although no defect in the paint job causes this,
GM will
repair, at no charge
to the owner, the surfaces of
new vehicles damaged by this fallout condition within
12 months or 12,000 miles (20 000 km) of purchase,
whichever occurs first.
GM Vehicle Care/Appearance
Materials
See your GM dealer for more information on purchasing
the following products.
GM Vehicle Care/Appearance Materials -
Description I Usage
Polishing Cloth Interior and exterior
Wax-Treated
Tar and Road Oil Removes tar, road oil and
Remover asphalt.
-
Chrome Cleaner and Use on chrome or
Polish stainless steel.
White Sidewall Tire Removes soil and black
Cleaner marks
from whitewalls.
-
I Cleans vinyl tops,
Vinvl Cleaner I upholstery-and
I convertible tops. I
Glass Cleaner Removes dirt, grime,
smoke and fingerprints.
Removes dirt and grime
from chrome wheels and
wire wheel covers.
Cleaner
Chrome and Wire
5-84

GM Vehicle Care/Appearance Materials
(cont’d) GM Vehicle
Care/Appearance Materials
(cont’d)
I Descrbtion I Usage
r- ~
Finish Enhancer
Ren-loves dust,
fingerprints, and surface contaminants, Spray on
wiDe
off.
Removes swirl marks,
fine scratches and other
contamination. Removes light scratches
and protects finish.
Description I Usage
I Medium foaming
shampoo. Cleans and
Biodegradable and
phosphate free.
Wash Wax
Concentrate lightly
waxes.
Spot Lifter Quickly and easily
removes spots and stains
from carpets, vinyl and
cloth upholstery.
Odor Eliminator Odorless spray odor
eliminator used on
fabrics, vinyl, leather and
carpet.
See your General Motors parts department for these
products. See Part
D: Recommended Fluids and
Lubricants on paqe
6- 15.
5-85

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

Electrical System
Add-on Electrical Equipment
Notice: Don’t add anything electrical to your
vehicle unless you check with your dealer first.
Some electrical equipment can damage your vehicle
and the damage wouldn’t be covered by your
warranty. Some add-on electrical equipment can
keep other components from working as they
should.
Your vehicle has an air bag system. Before attempting
to add anything electrical to your vehicle, see
Servicing Your Air Bag-Equipped Vehicle on page
1-85.
Windshield Wiper Fuses
The windshield wiper motor is protected by an internal
circuit breaker and a fuse. If the motor overheats due to
heavy snow, etc., the wiper will stop until the motor
cools. If the overload is caused by some electrical
problem and not snow, etc., be sure to get it fixed.
Power Windows and Other Power
Options
Circuit breakers protect the power windows and other
power accessories. When the current load is too heavy,
the circuit breaker opens and closes, protecting the
circuit until the problem is fixed or goes away.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses, circuit breakers
and fusible thermal links. This greatly reduces the
chance of fires caused by electrical problems.
Look at the silver-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one
of the identical
size and rating.
If you ever have a problem on the road and don’t have
a spare fuse, you can borrow one that has the same
amperage. Just pick some feature of your vehicle
that you can get along without
- like the radio or
cigarette lighter
- and use its fuse, if it is the correct
amperage. Replace it as soon as
you can.
5-87

Instrument Panel Fuse Block
The fuse block access
door is on the driver’s side
edge of the instrument
panel. Pull
off the cover to
access the fuse block.
You can remove fuses with a fuse extractor which
is
mounted to the fuse block access door. To remove fuses
if you don’t have a fuse extractor, hold the end of the
fuse between your thumb and index finger and pull
straight out.
VJ
LT DOORS
I’ I U
You may have spare fuses located behind the fuse
block access door. These can be used
to replace a bad
fuse. However, make sure it
is of the correct amperage.
5-88

Power Door Lock Relay
DRIVER UNLOCK (Driver’s
Door Unlock
Fuses
VEH CHMSL
LT TRLR ST/TRN
LT TRN
VEH STOP
Usage
Vehicle and Trailer High
Mounted Stoplamp
Left Turn SignaVStop Trailer
Left Turn Signals and
Sidemarkers
Vehicle Stoplamps, Brake Module, Electronic Throttle
Control Module
RT TRLR ST/TRN Right Turn Signal/Stop Trailer
-
RT TRN Right Turn Signals and
Sidemarkers
AUX
PWR 2 I
Rear Cargo Area Power
Outlets
5-89

Center Instrument Panel Fuse Block
The center instrument panel utility block is located
underneath the instrument panel,
to the left of the
steering column.
A FRT
[ 12-WAY) BODY (A) WHT (B)
HDLNR 1 (A)
12-WAY
1 2-WAY
5-90
SL RIDE
HDLR
2 Headliner Wiring Connector
Ride Control
Harness
Connection ~~ [BODY I Body Wiring Connector ---- - I Utl-uti Rear Defogger Relay
HDLNR
1 Headliner Wiring Connector 1
SPARE RELAY Not Used
CB
SEAT
CB RT DOOR Driver
and Passenger Seat
Module Circuit Breaker
Right Power Window Circuit
Breaker
SPARE Not Used
INFO Infotainment Harness
Connection

Underhood Fuse Block The underhood fuse block in the engine compartment
on the driver’s side
of the vehicle near the battery.
Lift the cover for access to the fuse/relay block.
To remove fuses, hold the end of the fuse between your
thumb and index finger and puli straight out.
See Engine Compartment Overview on page
5-12 for
more information on
its location.
5-91