2003 GMC YUKON DENALI power steering fluid

Engine Coolant Heater
Your vehicle may be equipped with an engine
coolant heater.
I
Usually, the coolant heater sho In very cold weather,
0°F
(-18°C) or
colder, the
engine coolant heater can
help. You’ll get easier
starting and better
fuel economy during
engine warm-up.
luld be ph Jgged in a
minimum of four hours prior to starting your vehicle.
At temperatures above 32°F (OOC), use of the coolant
heater is not required.
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord.
The cord is located on the driver’s side of the
engine compartment, near the power steering
fluid reservoir. 3.
Plug it into a normal, grounded 1 IO-volt AC outlet.
PIL,ging the cord inl, an ,..grc,.lded out.,_
could cause an electrical shock. Also, the
wrong kind
of extension cord could overheat
and cause a fire. You could be seriously
injured. Plug the cord into a properly grounded
three-prong
11 0-volt AC outlet. If the cord
won’t reach, use a heavy-duty three-prong
extension cord rated for at least
15 amps.
4. Before starting the engine, be sure to unplug and
store the cord as it was before to keep it away
from moving engine parts.
If you don’t, it could be
damaged.
How long should you keep the coolant heater plugged
in? The answer depends on the outside temperature, the
kind of oil you have, and some other things. Instead
of trying to list everything here, we ask that you contact
your dealer in the area where you’ll be parking your
vehicle. The dealer can give you the best advice for that
particular area.
2-21

Section 5 Service and Appearance Care
Service ............................................................ 5.3
Doing Your Own Service Work
......................... 5-3
Adding Equipment
to the Outside of Your
Vehicle
.................................................. 5-4
................................................................ Fuel 5.5
Gasoline Octane ............................................ 5.5
Gasoline Specifications ................................... 5-5
California Fuel ............................................... 5-6
Additives
....................................................... 5.6
Fuels in Foreign Countries
............................... 5-6
Filling Your Tank
............................................ 5-7
Filling a Portable Fuel Container ....................... 5.9
the Hood .................... , .................... 5.10
Hood Release ...................... ................ 5-10
Engine Compartment Overview ....... ......... 5-12
Engine Oil ....................................... ..... 5.13
Engine Air Cleaner/Filter ............................. 5.17
Automatic Transmission Fluid ......................... 5-20
Engine Coolant ......................................... 5-22
Checking Things Under
~~
Coolant Surge Tank Pressure Cap ............... 5-25
Engine Overheating ....................................... 5-25
Cooling System ............................................ 5.28
Engine Fan Noise ......................................... 5.33
Power Steering Fluid
..................................... 5-34
Windshield Washer Fluid
................................ 5.34
Brakes
........................................................ 5.36
Battery
........................................................ 5-39
Jump Starting
............................................... 5.40
All-Wheel Drive .............................................. 5.46
Rear Axle .................................. .......... 5-48
Bulb Replacement .......................................... 5-49
Halogen Bulbs .............................................. 5-49
Headlamps
.................................................. 5-49
Running Lamps
......................................... 5-50
Center High-Mounted Stoplamp (CHMSL) ......... 5-52
Taillamps ..................................................... 5-52
Replacement Bulbs ................................... 5.53
Front Turn Signal, Sidemarker and Daytime
5- 1

A. Engine Air CleanedFilter
B. Coolant Surge Tank
C. Air Filter Restriction Indicator
D. Engine Qii Dipstick
E. Engine Oil Fill
F. Automatic Transmission Dipstick
G. Fan
H. Remote Negative (-) Terminal (GND)
I. Remote Positive (+) Terminal
J. Power Steering Fluid Reservoir (Out of View)
K. Brake Master Cylinder Reservoir
L. Underhood Fuse Block
M. Battery
N. Windshield Washer Fluid Reservoir
Before closing the hood, be sure all filler caps are on
properly. Pull down the hood and close
it firmly.
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 3-52.
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 loop handle and
is located in the engine
compartment on the
passenger’s side of the
vehicle. See Engine
Compartment Overview on
page
5- 12 for 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.
5-1 3

Power Steering Fluid
-
When to Check Power Steering Fluid
It is not necessary to regularly check power steering fluid
unless you suspect there is a leak in the system or
you hear an unusual noise. A fluid
loss in this system
could indicate a problem. Have the system inspected
and repaired. See Engine Compartment Overview
on page
5-72 for reservoir location.
How to Check Power Steering Fluid
Turn the key off, let the engine compartment cool down.
wipe the cap and the top of the reservoir clean, then
unscrew the cap and wipe the dipstick with a clean rag.
Replace the cap and completely tighten it. Then
remove the cap again and look at the fluid level on the
dipstick.
The level should be at the
FULL COLD mark. If
necessary, add only enough fluid to bring the level up to
the mark.
What to Use
To determine what kind of fluid to use, see Part D:
Recommended Fluids and Lubricants on page 6-15.
Always use the proper fluid. Failure to use the proper
fluid can cause leaks and damage hoses and seals.
Windshield Washer Fluid
What to Use
When you need windshield washer fluid, be sure to read
the manufacturer's instructions before use. If you will
be operating your vehicle in an area where the
temperature may fall below freezing, use a fluid that has
sufficient protection against freezing. See Engine
Compartment Overview on page
5-72 for reservoir
location.
5-34

Part C: Periodic Maintenance
Inspections
Listed in this part are inspections and services which
should be performed at least twice a year (for instance,
each spring and fall).
You should let your dealer’s
service department or other qualified service center do
these jobs. Make sure any necessary repairs are
completed at once.
Proper procedures
to perform these services may be
found in a service manual. See Service Publications
Ordering Information on page
7- IO.
Steering and Suspension Inspection
Inspect the front and rear suspension and steering
system for damaged, loose or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook-up, binding, leaks,
cracks, chafing, etc.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the body
near the exhaust system. Look for broken, damaged,
missing or out-of-position parts as well as open seams,
holes, loose connections or other conditions which
could cause a heat build-up in the floor pan or could let
exhaust fumes into the vehicle. See Engine Exhaust
on page 2-29.
Fuel System Inspection
Engine Cooling System Inspection
Inspect the complete fuel system for damage or leaks.
Inspect the hoses and have them replaced
if they
are cracked, swollen or deteriorated. Inspect all pipes,
fittings and clamps; replace as needed. Clean the
outside of the radiator and air conditioning condenser.
To help ensure proper operation, a pressure test of
the cooling system and pressure cap is recommended
at least once a year.
Transfer Case and Front Axle
(All-Wheel Drive) Inspection
Every 12 months, or at engine oil change intervals,
check front axle and transfer case and add lubricant
when necessary.
A fluid loss could indicate a problem.
Check and have it repaired,
if needed. Check vent
hose at transfer case for kinks and proper installation.
Brake System Inspection
Inspect the complete system. Inspect brake lines and
hoses for proper hook-up, binding, leaks, cracks,
chafing, etc. Inspect disc brake pads for wear and rotors
for surface condition. Inspect other brake parts,
including calipers, parking brake, etc. You may need
to
have your brakes inspected more often if your driving
habits or conditions result in frequent braking.
6-1 4

Part D: Recommended Fluids and
Lubricants
Flyids and lubricants identified below by mme,
part number or specification may be obtained from
your dealer.
Usage
Engine Oil
Engine Coolant
Hydraulic Brake
System
Windshield
Washer Solvent
Fluid/Lubricant
Engine oil with the American
Petroleum Institute Certified for
Gasoline Engines starburst symbol
of the proper viscosity. To determine
the preferred viscosity for your
vehicle's engine, see Engine
Oil on
page
5- 13.
50/50 mixture of clean, drinkable
water and use only
DEX-COOL@Coolant. See Engine
Coolant on page
5-22.
Delco Supreme 1 l@ Brake Fluid or
equivalent
DOT-3 brake fluid.
GM Optikleen@Washer Solvent or
equivalent.
Usage
Power Steering System
Automatic
Transmission
Key Lock
Cylinders
Chassis
Lubrication
Front and
Rear Axle
Transfer Case
Fluid/Lubricant
GM Power Steering Fluid (GM Part No.
U.S. 1052884, in Canada
993294, or equivalent).
DEXRON@-Ill Automatic
Transmission Fluid.
Mulit-Purpose Lubricant, Superlube
(GM Part No.
U.S. 12346241 , in
Canada 10953474, or equivalent).
Chassis Lubricant (GM Part No.
U.S. 12377985, in Canada
88901242, or equivalent) or lubricant
meeting requirements of NLGl
#2,
Category LB or GC-LB.
SAE 75W-90 Synthetic Axle Lubricant (GM Part
No. U.S.
12378261, in Canada 10953455) or
equivalent meeting GM Specification
99861
15.
DEXRON@-Ill Automatic
Transmission Fluid.
6-1 5

Accessory Power Outlets ................................. 3-17
Adding Washer Fluid
....................................... 5-35
Additional Program Information
........................... 7-8
Additives, Fuel
................................................. 5-6
Add-on Electrical Equipment
............................ 5-87
Adjusting the Speakers (Balance/Fade)
.......... 3-63
Passenger Status Indicator
........................... 3-32
Readiness Light
.......................................... 3-31
Air Bag Systems
..................................... 1-72, 1-77
Vehicle
................................................... 1-85
How Does an Air Bag Restrain? .................... 1-78
Passenger Sensing System
........................... 1-81
Servicing Your Air Bag-Equipped Vehicle
......... 1-85
What Makes an Air Bag Inflate?
.................... 1-78
What Will You See After an Air Bag Inflates?
...... 1-79
Where Are the Air Bags?
.............................. 1-74
Air Cleaner/Filter, Engine
................................. 5-1 7
Air Conditioning
.............................................. 3-23
All Overseas Locations
...................................... 7-4
All-Wheel Drive
............................................... 5-46
Aluminum Wheels
........................................... 5-83
AM
............................................................... 3-87
Antenna, Fixed Mast
....................................... 3-89
Antenna, XMTM Satellite Radio System
............... 3-89
Adjustable
Throttle and Brake Pedal
.................. 2-20
Air Bag
Adding Equipment
to Your Air Bag-Equipped
When Should an
Air Bag Inflate? ................... 1-77 Anti-lock Brake System
... 4-7
Appearance Care
............................................ 5-78
Care of Safety Belts
.................................... 5-80
.......................
Anti-Lock Brake. System Warning Light .......... 3-35
Chemica! Paint Spcltting ............................... 5-84
Cleaning the Inside of Your Vehicle ................ 5-78
Cleaning the Outside of Your Vehicle
.............. 5-81
Finish Damage
............................................ 5-83
GM Vehicle Care/Appearance Materials
.......... 5-84
Sheet Metal Damage
................................... 5-83
Underbody Maintenance
... ............. 5-84
Weatherstrips
...................... ............. 5-80
Ashtrays
........................................................ 3-18
Audio Output
.................................................. 3-78
Audio System(s)
............................................. 3-58
Audio Systems Audio Steering Wheel Controls
...................... 3-86
Care of Your Cassette Tape Player
................ 3-87
Care of Your CD and DVD Player
.................. 3-89
Care of Your CD Changer
............................ 3-88
Care of Your CDs and DVDs
........................ 3-88
CD Changer
............................................... 3-83
Fixed Mast Antenna
..................................... 3-89
Radio with Cassette and CD
......................... 3-59
Rear Seat Audio (RSA)
................................ 3-81
Setting the Time
.......................................... 3-58
Theft-Deterrent Feature
................................ 3-85
Understanding Radio Reception
..................... 3-87
XMTM Satellite Radio Antenna System
............ 3-89
Automatic Climate Control System
..................... 3-19
1

Exit Lighting ........................................ 3-16
Extender, Safety Belt
....................................... 1-47
Exterior Lamps
......................... ~ ~ ................ 3-1 3
FabricKarpet
...
Engine Air Cleaner ..............................
Finding a P TY Station (RDS and XMTM) .....
Filter
Finding a Station
....................................
F
....
Finish Care
Finish Damage
................................
Fixed Mast Antenna .........................
Flash-to-Pass ...................................
Flat Tire .........................................
Flat Tire, Changing ..........................
Fluid
Automatic Transmission
.................
Power Steering ............................
Windshield Washer .......................
-
.....................................
..
.....
...
.... 5-78
.... 5-17
.... 3-63
.... 3-61
.... 5-81
.... 5-83
.... 3-89
...... 3-8
.... 5-63
............. 5-63
.......... 5-20
.......... 5-34
.......... 5-34
FM Stereo
..................................................... 3-87
Fog Lamps
.................................................... 3-1 5
Folding the Seatback ....................................... 1-17
Folding the Seatbacks
............................. 1-12, 1-22
Folding the Seatbacks (60/40 Split Bench Seat) .... 1-9
Following Distance
.......................................... 4-53
Footnotes
........................................ ......... 6-5
Front Axle
.................................... ... 5-47 Frontal
Air Bags
...................................... 1-77
Fuel
............................................................... 5-5
Additives ...................................................... 5-6
California Fuel
.............................................. 5-6
Filling Your Tank
........................................... 5-7
Fuels in Foreign Countries
.......................... 5-6
Gasoline Octane
....................................... 5-5
Gasoline Specifications .................................. 5-5
System Inspection ....................................... 6-14
Filling
a Portable Fuel Container
..................... 5-9
Gage
............................. .................... 3-42
Low Warning Light
....................................... 3-42
Fuel Information Button
.................................... 3-45
FUEL LEVEL LOW
......................................... 3-55
Fuses
Fuses and Circuit Breakers
........................... 5-87
Windshield Wiper
......................................... 5-87
G
Gage
Engine Coolant Temperature
............. .... 3-36
Fuel
...................................................... 3-42
Oil Pressure
........................................... 3-40
Speedometer
.......................................... 3-30
Tachometer
............................................. 3-30
Transmission Temperature
......................... 3-37
Voltmeter Gage ....................................... 3-34
Garage Door Opener
....................................... 2-38
6