2003 GMC YUKON ECU

4. Insert the hoist end (F)
through the hole (G) in
the rear bumper
and into the hoist
shaft.
5. Raise the tire part way upward. Make sure the
retainer is seated in the wheel opening.
6. Raise the tire fully against the underside of the
vehicle by turning the wheel wrench clockwise
until you hear two clicks or feel it skip twice. You
cannot overtighten the cable.A. Push and Pull
B. Rotate Tire
7. Make sure the tire is stored securely. Push, pull,
and then try to rotate or turn the tire. If the tire
moves, use the wheel wrench to tighten the cable.
Reinstall the spare tire lock (if equipped).
5-82
2003 - Yukon/Yukon XL

To store the tools, follow these procedures:
For Tahoe/Yukon, do the following:
1. Put the tool kit, with the jack tools and gloves, in
the tool bag and place in the retaining clip above
the jack.
2. Tighten down with the wing nut.
3. Then, assemble wheel chocks and bottle jack
together with the wing nut and retaining hook.
4. Position behind the jack storage cover in the left
rear side panel and tighten, adjusting clockwise
until the jack is secured tight in the mounting
bracket. Be sure to position the holes in the base of
the jack onto the pin in the mounting bracket.
For Suburban/Yukon XLdo the following:
1. Return the tool kit (jack tools and gloves) to the
tool bag.
2. Assemble wheel chocks and bottle jack together
with the wing nut and retaining hook.
3. Position under the jack storage tray in the left rear
side panel below the wheelbase and tighten,
adjusting clockwise until the jack is secured tight in
the mounting bracket. Be sure to position the
holes in the base of the jack onto the pin in the
mounting bracket.4. Use the retaining clip to fasten the tool kit on the
stud in the storage compartment in the rear left
trim panel and turn the wing nut clockwise to
secure.
5. Return the storage tray.
A. Tool Kit with Jack
Tools and Gloves
B. Retaining Bracket
and Wing NutC. Wing Nut Holding
Tire Blocks
D. Tire Blocks
E. Bottle Jack Tahoe/Yukon (Rear Access Panel)
5-83
2003 - Yukon/Yukon XL

7. Place the bottom edge of the jack on the wheel
blocks, separating them so that the jack is
balanced securely.
8. Attach the jack handle, extension, and wheel
wrench to the jack and place it (with the wheel
blocks) under the vehicle towards the front of the
rear bumper. Position the center lift point of the jack
under the center of the spare tire.
9. Turn the wrench clockwise to raise the jack until it
lifts the endfitting.
10. Continue raising the jack until the spare tire stops
moving upward and is heldfirmly in place. The
secondary latch has released and the spare tire is
balancing on the jack.
5-86
2003 - Yukon/Yukon XL

At Least Twice a Year
Restraint System Check
Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages
are working properly. Look for any other loose or
damaged safety belt system parts. If you see anything
that might keep a safety belt system from doing its
job, have it repaired. Have any torn or frayed safety belts
replaced.
Also look for any opened or broken air bag coverings,
and have them repaired or replaced. (The air bag
system does not need regular maintenance.)
Wiper Blade Check
Inspect wiper blades for wear or cracking. Replace
blade inserts that appear worn or damaged or that
streak or miss areas of the windshield. Also see
Cleaning the Outside of Your Vehicle on page 5-92.
Spare Tire Check
At least twice a year, after the monthly ination check of
the spare tire determines that the spare is inated to
the correct tire ination pressure, make sure that
the spare tire is stored securely. Push, pull, and then try
to rotate or turn the tire. If it moves, use the wheel
wrench/ratchet to tighten the cable. SeeChanging a Flat
Tire on page 5-69.
Weatherstrip Lubrication
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth. During very cold,
damp weather more frequent application may be
required. SeePart D: Recommended Fluids and
Lubricants on page 6-17.
Automatic Transmission Check
Check the transmissionuid level; add if needed. See
Automatic Transmission Fluid on page 5-23.Auid loss
may indicate a problem. Check the system and repair
if needed.
At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specied in Part D.
Body Lubrication Service
Lubricate all hood latch assembly, secondary latch,
pivots, spring anchor, release pawl, rear compartment
hinges, outer liftgate handle pivot points, rear door
detent link, roller mechanism, liftgate handle pivot points,
latch bolt, fuel door hinge, cargo door hinge, locks
and folding seat hardware. Part D tells you what to use.
More frequent lubrication may be required when
exposed to a corrosive environment.
6-12
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

Instrument Panel
Cluster.......................................................3-38
Overview..................................................... 3-4
Instrument Panel Brightness.............................3-18
Instrument Panel Fuse Block............................5-98
Interior Lamps................................................3-18
J
Jump Starting.................................................5-44
K
Key Lock Cylinders Service..............................6-12
Keyless Entry System....................................... 2-4
Keys............................................................... 2-3
L
Lamps
Exterior......................................................3-14
Interior.......................................................3-18
Lamps On Reminder.......................................3-16
Lap Belt........................................................1-37
Lap-Shoulder Belt...........................................1-28
LATCH System
Child Restraints...........................................1-58
Securing a Child Restraint Designed for the
LATCH System........................................1-61Leaving Your Vehicle With the Engine Running . . . 2-36
LEFT REAR DOOR AJAR................................3-69
Level Control..................................................4-59
Liftgate..........................................................2-12
Liftgate Glass and Liftgate................................2-13
Light
Air Bag Readiness.......................................3-40
Anti-Lock Brake System Warning...................3-44
Battery Warning..........................................3-42
Brake System Warning.................................3-43
Cruise Control.............................................3-52
Low Fuel Warning.......................................3-53
Malfunction Indicator....................................3-48
Passenger Air Bag Status Indicator................3-40
Safety Belt Reminder...................................3-39
Tow/Haul Mode...........................................3-52
Traction Off................................................3-45
Lighted Visor Vanity Mirror...............................2-16
Listening to a DVD................................3-97, 3-110
Loading Your Vehicle.......................................4-58
Loading Your Vehicle for Off-Road Driving..........4-25
Locking Rear Axle...........................................4-12
Lockout Protection..........................................2-12
Lock-Out Switch
.............................................2-15
Locks
Delayed Locking
........................................... 2-9
Door
........................................................... 2-7
Lockout Protection
.......................................2-12
Power Door
.................................................. 2-8
Programmable Automatic Door Locks
............... 2-9
9
2003 - Yukon/Yukon XL

Locks (cont.)
Rear Door Security Locks.............................2-11
Loss of Control...............................................4-21
LOW COOLANT LEVEL..................................3-64
Low Fuel Warning Light...................................3-53
Luggage Carrier..............................................2-55
Lumbar
Power Controls............................................. 1-5
M
Maintenance, Normal Replacement Parts..........5-109
Maintenance Schedule
At Each Fuel Fill.........................................6-11
At Least Once a Month................................6-11
At Least Once a Year..................................6-12
At Least Twice a Year..................................6-12
Brake System Inspection..............................6-16
Engine Cooling System Inspection.................6-16
Exhaust System Inspection...........................6-15
Fuel System Inspection................................6-15
How This Section is Organized....................... 6-3
Introduction.................................................. 6-2
Maintenance Requirements............................. 6-2
Part A - Scheduled Maintenance Services......... 6-4
Part B - Owner Checks and Services.............6-11
Part C - Periodic Maintenance Inspections......6-15
PartD-Recommended Fluids and
Lubricants...............................................6-17
PartE-Maintenance Record........................6-19Maintenance Schedule (cont.)
Scheduled Maintenance................................. 6-5
Steering and Suspension Inspection...............6-15
Transfer Case and Front Axle (Four-Wheel
Drive) Inspection......................................6-16
Using Your................................................... 6-4
Your Vehicle and the Environment................... 6-2
Maintenance When Trailer Towing.....................4-72
Making Turns.................................................4-70
Malfunction Indicator Light................................3-48
Manual Seats................................................... 1-3
Manual Windows............................................2-14
Matching Transmitter(s) to Your Vehicle............... 2-6
Memory Seat.................................................2-58
Message
DIC Warnings and Messages........................3-64
Mexico, Central America and Caribbean Islands/
Countries (Except Puerto Rico and U.S. Virgin
Islands)....................................................... 7-4
Mirrors
Automatic Dimming Rearview with Compass
and Temperature Display
...........................2-43
Automatic Dimming Rearview with OnStar
®,
Compass and Temperature Display
.............2-40
Manual Rearview Mirror
................................2-40
Outside Automatic Dimming Mirror
.................2-47
Outside Camper-Type Mirrors
........................2-46
Outside Convex Mirror
.................................2-48
Outside Curb View Assist Mirrors
...................2-47
Outside Heated Mirrors
................................2-48
10
2003 - Yukon/Yukon XL