2003 GMC YUKON lock

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to LOCK in each shift lever position.
The key should turn to LOCK only when the
shift lever is in PARK (P).
The key should come out only in LOCK.
Parking Brake and Automatic
Transmission Park (P) Mechanism
Check
{CAUTION:
When you are doing this check, your vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front of your vehicle in
case it begins to roll. Be ready to apply the
regular brake at once should the vehicle begin
to move.Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set the
parking brake.
To check the parking brake’s holding ability: With the
engine running and transmission in NEUTRAL (N),
slowly remove foot pressure from the regular brake
pedal. Do this until the vehicle is held by the parking
brake only.
To check the PARK (P) mechanism’s holding ability:
With the engine running, shift to PARK (P). Then
release the parking brake followed by the regular
brake.
Underbody Flushing Service
At least every spring, use plain water toush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
6-14
2003 - Yukon/Yukon XL

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.
6-17
2003 - Yukon/Yukon XL

GM Mobility Program for Persons
with Disabilities
This program, available to
qualied applicants, can
reimburse you up to
$1,000 toward aftermarket
driver or passenger
adaptive equipment you
may require for your
vehicle (hand controls,
wheelchair/scooter
lifts, etc.).
This program can also provide you with free resource
information, such as area driver assessment centers and
mobility equipment installers. The program is available
for a limited period of time from the date of vehicle
purchase/lease. See your dealer for more details or call
the GM Mobility Assistance Center at 1-800-323-9935.
Text telephone (TTY) users, call 1-800-833-9935.
GM of Canada also has a Mobility Program. Call
1-800-GM-DRIVE (463-7483) for details. All TTY users
call 1-800-263-3830.
Roadside Assistance Program
GMC’s Roadside Assistance Provides stranded owners
with over-the-phone roadside repairs, location of the
nearest GMC dealer or the following special services:
Flat Tire Change:Installation of spare tire will be
covered at no charge (customer is responsible for repair
or replacement of tire).
Fuel Delivery:Delivery of enough fuel for the customer
to get to the nearest service station (up to $5.00)
will be covered.
Jump Start:No-start situations which require a battery
jump start will be covered at no charge.
Lock Out:Replacement keys or locksmith service will be
covered at no charge if you are unable to gain entry
into your vehicle. Delivery of the replacement key will be
covered within 10 miles (16 km).
Emergency Towing Service:Towing to the nearest GMC
dealer for warranty related disablements will be
covered.
7-5
2003 - Yukon/Yukon XL

A
Accessory Power Outlets.................................3-20
Adding Washer Fluid.......................................5-39
Additional Program Information........................... 7-9
Additives, Fuel................................................. 5-5
Add-On Electrical Equipment............................5-97
Adjustable Throttle and Brake Pedal..................2-21
Adjusting the Speakers
(Balance/Fade)..................3-74, 3-78, 3-88, 3-101
After Off-Road Driving.....................................4-37
Air Bag
Passenger Status Indicator...........................3-40
Readiness Light..........................................3-40
Air Bag Systems.....................................1-70, 1-77
Adding Equipment to Your Air Bag-Equipped
Vehicle...................................................1-86
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
When Should an Air Bag Inflate?...................1-76
Where Are the Air Bags?..............................1-74
Air Cleaner/Filter, Engine.................................5-21
Air Conditioning
..............................................3-29
All Overseas Locations
...................................... 7-4
All-Wheel Drive
...............................................5-49
All-Wheel Drive with Stabilitrak
®........................2-31
AM
.............................................................3-123AM-FM Radio.................................................3-72
Antenna, Fixed Mast......................................3-125
Antenna, XM™ Satellite Radio Antenna System . . . 3-126
Anti-lock Brake System..................................... 4-7
Anti-Lock Brake, System Warning Light..............3-44
Appearance Care............................................5-88
Care of Safety Belts....................................5-91
Chemical Paint Spotting...............................5-94
Cleaning the Inside of Your Vehicle................5-89
Cleaning the Outside of Your Vehicle..............5-92
Finish Damage............................................5-94
GM Vehicle Care/Appearance Materials..........5-95
Sheet Metal Damage...................................5-94
Underbody Maintenance...............................5-94
Weatherstrips..............................................5-91
Approaching a Hill..........................................4-29
Ashtrays........................................................3-21
Audio Output................................................3-118
Audio System(s).............................................3-71
AM-FM Radio.............................................3-72
Audio Steering Wheel Controls....................3-122
Care of Your Cassette Tape Player...............3-124
Care of Your CD and DVD Player
................3-125
Care of Your CDs and DVDs
.......................3-125
Chime Level Adjustment
.............................3-126
Fixed Mast Antenna
...................................3-125
Radio with Cassette and CD
.........................3-85
Radio with CD
............................................3-75
Radio with Six-Disc CD
................................3-98
Rear Seat Audio (RSA)
...............................3-120
1
2003 - Yukon/Yukon XL

Audio System(s) (cont.)
Setting the Time for Radios with Radio Data
Systems (RDS)........................................3-72
Setting the Time for Radios without Radio
Data Systems (RDS)................................3-71
Theft-Deterrent Feature...............................3-122
Understanding Radio Reception...................3-123
XM™Satellite Radio Antenna System...........3-126
Automatic Headlamp System............................3-15
Automatic Level Control...................................4-60
Automatic Transfer Case..................................2-26
Automatic Transmission
Fluid..........................................................5-23
Operation...................................................2-22
Automatic Transmission Check..........................6-12
Automatic Transmission Shift Lock Control
System Check.............................................6-13
Autoride™.....................................................4-60
Auxiliary Roof Mounted Lamp Switch.................3-17
B
Backing Up....................................................4-69
Battery..........................................................5-43
BATTERY NOT CHARGING.............................3-65
Battery Replacement......................................... 2-6
Battery Run-Down Protection............................3-20
Battery Warning Light......................................3-42
Before Leaving on a Long Trip.........................4-44
Before You Drive...........................................3-111Before You Go Off-Roading..............................4-25
Bench Seat....................................................1-15
Bench Seat Split (50/50)..................................1-11
Bench Seat, Split (60/40)................................... 1-9
Body Lubrication Service..................................6-12
Brake
Parking......................................................2-34
System Inspection.......................................6-16
System Warning Light..................................3-43
Brake Adjustment............................................5-43
Brake Fluid
....................................................5-40
Brake Pedal, Throttle
.......................................2-21
Brake Pedal Travel
.........................................5-43
Brake Wear
...................................................5-42
Brakes
..........................................................5-40
Braking
........................................................... 4-6
Braking in Emergencies
..................................... 4-9
Break-In, New Vehicle
.....................................2-18
Bucket Seats, Rear
.........................................1-20
Bulb Replacement
...........................................5-52
Front Turn Signal, Sidemarker and Daytime
Running Lamps
........................................5-54
Halogen Bulbs
............................................5-53
Headlamps
.................................................5-53
Replacement Bulbs
......................................5-59
Roof Marker Lamps
.....................................5-55
Side Identification Marker Lamps
...................5-55
Taillamps
....................................................5-57
Buying New Tires
...........................................5-64
2
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
3
2003 - Yukon/Yukon XL

D
Daytime Running Lamps..................................3-16
Defensive Driving............................................. 4-2
Defogging and Defrosting.........................3-24, 3-30
Delayed Locking............................................... 2-9
Dinghy Towing................................................4-55
Doing Your Own Service Work........................... 5-3
Dolly Towing..................................................4-57
Dome Lamps .................................................3-20
Door
Delayed Locking........................................... 2-9
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Programmable Automatic Door Locks............... 2-9
Rear Door Security Locks.............................2-11
Driver
Position, Safety Belt.....................................1-28
DRIVER DOOR AJAR.....................................3-69
Driver Information Center (DIC).........................3-53
DIC Operation and Displays..........................3-54
DIC Warnings and Messages........................3-64
Driving
At Night
.....................................................4-37
City
...........................................................4-42Driving (cont.)
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-43
Hill and Mountain Roads..............................4-45
In Rain and on Wet Roads...........................4-39
Winter........................................................4-47
Driving Across an Incline..................................4-33
Driving Downhill..............................................4-32
Driving in Mud, Sand, Snow or Ice....................4-35
Driving in Water..............................................4-36
Driving On Grades..........................................4-70
Driving on Off-Road Hills.................................4-28
Driving on Snow or Ice....................................4-48
Driving Through Deep Standing Water...............4-40
Driving Through Flowing Water.........................4-41
Driving Uphill..................................................4-29
Driving with a Trailer.......................................4-68
Dual Automatic Climate Control System.............3-26
Dual Climate Control System............................3-22
DVD
Cleaning the Video Screen..........................3-125
Distortion..................................................3-123
Rear Seat Entertainment System..................3-111
DVD Player..................................................3-111
5
2003 - Yukon/Yukon XL

Fluid
Automatic Transmission................................5-23
Power Steering...........................................5-38
Windshield Washer......................................5-39
FM Stereo....................................................3-123
Fog Lamps
....................................................3-17
Folding the Seatback
.......................................1-16
Folding the Seatbacks
.......................1-9, 1-11, 1-20
Following Distance
..........................................4-69
Footnotes
........................................................ 6-5
Four-Wheel Drive
....................................2-26, 5-51
Front Axle
......................................................5-52
Front Axle Locking Feature
...............................2-26
Front Reading Lamps
......................................3-19
Front Storage Area
.........................................2-54
Frontal Air Bags
.............................................1-76
Fuel
............................................................... 5-4
Additives
...................................................... 5-5
California Fuel
.............................................. 5-5
E-85 (85% Ethanol)
....................................... 5-6
Filling a Portable Fuel Container
....................5-10
Filling Your Tank
........................................... 5-7
Fuels in Foreign Countries
.............................. 5-7
Gage
.........................................................3-52
Gasoline Octane
........................................... 5-4
Gasoline Specifications
.................................. 5-4Fuel (cont.)
Low Warning Light.......................................3-53
System Inspection.......................................6-15
Fuel Information Button....................................3-56
FUEL LEVEL LOW.........................................3-67
Fuses
Fuses and Circuit Breakers...........................5-98
Windshield Wiper.........................................5-97
G
Gage
Engine Coolant Temperature.........................3-46
Fuel..........................................................3-52
Oil Pressure...............................................3-51
Speedometer..............................................3-39
Tachometer.................................................3-39
Transmission Temperature.............................3-46
Voltmeter Gage...........................................3-43
Garage Door Opener.......................................2-50
Gasoline
Octane........................................................ 5-4
Specifications............................................... 5-4
Gate Operator and Canadian Programming........2-53
Getting Familiar with Off-Road Driving................4-26
Glove Box.....................................................2-54
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
7
2003 - Yukon/Yukon XL