2003 GMC YUKON air suspension

After Off-Road Driving
Remove any brush or debris that has collected on the
underbody, chassis or under the hood. These
accumulations can be are hazard.
After operation in mud or sand, have the brake linings
cleaned and checked. These substances can cause
glazing and uneven braking. Check the body structure,
steering, suspension, wheels, tires and exhaust
system for damage. Also, check the fuel lines and
cooling system for any leakage.
Your vehicle will require more frequent service due to
off-road use. Refer to the Maintenance Schedule
for additional information.
Driving at Night
Night driving is more dangerous than day driving.
One reason is that some drivers are likely to be
impaired—by alcohol or drugs, with night vision
problems, or by fatigue.
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2003 - Yukon/Yukon XL

Automatic Level Control
The automatic level control rear suspension is available
on C/K 1500 vehicles and comes as a part of the
Autoride™suspension.
This type of level control is fully automatic and will provide
a better leveled riding position as well as better handling
under a variety of passenger and loading conditions. An
air compressor connected to the rear shocks will raise or
lower the rear of the vehicle to maintain proper vehicle
height. The system is activated when the ignition key is
turned to RUN and will automatically adjust vehicle height
thereafter. The system may exhaust (lower vehicle
height) for up to ten minutes after the ignition key has
been turned off. You may hear the air compressor
operating when the height is being adjusted.
If a self-equalizing hitch is being used, it is
recommended to allow the shocks to inate, thereby
leveling the vehicle prior to adjusting the hitch.
Autoride™
The Autoride™feature will provide a superior vehicle ride
and handling under a variety of passenger and loading
conditions.The system is fully automatic and uses a computer
controller to continuously monitor vehicle speed, wheel to
body position, lift/dive and steering position of the vehicle.
The controller then sends signals to each shock absorber
to independently adjust the damping level to provide the
optimum vehicle ride.
Autoride™also interacts with the tow/haul switch that,
when engaged, will provide additional control of the shock
absorbers. This additional control results in better ride
and handling characteristics when the vehicle is loaded or
towing a trailer. SeeTow/Haul Mode Light on page 3-52
for more information.
Trailer Recommendations
You must subtract your hitch loads from the Cargo
Weight Rating (CWR) for your vehicle. CWR is the
maximum weight of the load your vehicle can carry. It
doesn’t included the weight of the people inside. But you
cangure about 150 lbs. (68 kg) for each seat. The total
cargo load must not be more than your vehicle’s CWR.
Weigh your vehicle with the trailer attached, so that you
won’t go over the GVWR or GAWR. If you are using
a weight-distributing hitch, weigh the vehicle without the
spring bars in place.
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2003 - Yukon/Yukon XL

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. SeeEngine Oil on
page 5-16for 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, transfer case 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.
See the mileage intervals following for additional
services that may be performed with an engine oil
change and chassis lubrication. 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)
❑Check rear/front axlefluid level and addfluid as
needed. Check constant velocity joints and axle seals
for leaking.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-61for proper rotation pattern and additional
information.(See footnote +.)
15,000 Miles (25 000 km)
❑Inspect engine air cleanerfilter or change indicator (if
equipped). If necessary, replace thefilter. If vehicle is
driven in dusty/dirty conditions, inspectfilter or
change indicator (if equipped) at every engine oil
change. SeeEngine Air Cleaner/Filter on page 5-21
for more information.An Emission Control Service.
(See footnote†.)
❑Check rear/front axlefluid level and addfluid as
needed. Check constant velocity joints and axle seals
for leaking.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-61for proper rotation pattern and additional
information.(See footnote +.)
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2003 - Yukon/Yukon XL

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 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. SeeService Publications
Ordering Information on page 7-10.
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, chang, 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 theoor pan or could let
exhaust fumes into the vehicle. SeeEngine Exhaust
on page 2-38.
Fuel System Inspection
Inspect the complete fuel system for damage or leaks.
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2003 - Yukon/Yukon XL

Reporting Safety Defects to the
Canadian Government
If you live in Canada, and you believe that your vehicle
has a safety defect, you should immediately notify
Transport Canada, in addition to notifying General
Motors of Canada Limited. You may write to:
Transport Canada
330 Sparks Street
Tower C
Ottawa, Ontario K1A 0N5
Reporting Safety Defects to General
Motors
In addition to notifying NHTSA (or Transport Canada) in
a situation like this, we certainly hope you’ll notify us.
Please call us at 1-800-GMC-8782 (1-800-462-8782), or
write:
Pontiac-GMC Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172
In Canada, please call us at 1-800-263-3777 (English)
or 1-800-263-7854 (French). Or, write:
General Motors of Canada Limited
Customer Communication Centre, 163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
Service Publications Ordering
Information
Service Manuals
Service Manuals have the diagnosis and repair
information on engines, transmission, axle, suspension,
brakes, electrical, steering, body, etc.
RETAIL SELL PRICE: $120.00
Transmission, Transaxle, Transfer
Case Unit Repair Manual
This manual provides information on unit repair service
procedures, adjustments, and specications for GM
transmissions, transaxles, and transfer cases.
RETAIL SELL PRICE: $50.00
Service Bulletins
Service Bulletins give technical service information
needed to knowledgeably service General Motors cars
and trucks. Each bulletin contains instructions to
assist in the diagnosis and service of your vehicle.
In Canada, information pertaining to Product Service
Bulletins can be obtained by contacting your General
Motors dealer or by calling 1-800-GM-DRIVE
(1-800-463-7483).
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2003 - Yukon/Yukon XL

SERVICE STABILITY......................................3-70
Setting Preset PTYs (RDS Only).....3-79, 3-89, 3-102
Setting Preset Stations..........3-73, 3-77, 3-87, 3-100
Setting the Time
Radios with Radio Data Systems (RDS).........3-72
Radios without Radio Data Systems (RDS).....3-71
Setting the Tone
(Bass/Treble)....................3-73, 3-78, 3-87, 3-100
Sheet Metal Damage.......................................5-94
Shifting Into Park (P).......................................2-35
Shifting Out of Park (P)...................................2-37
Side Impact Air Bags.......................................1-77
Skidding........................................................4-21
Some Other Rainy Weather Tips.......................4-41
Spare Tire.....................................................5-88
Spare Tire Check............................................6-12
Special Fabric Cleaning Problems.....................5-90
Specifications, Capacities...............................5-106
Speedometer..................................................3-39
Split Bench Seat (50/50)..................................1-11
Split Bench Seat (60/40).................................... 1-9
Stabilitrak
®, All-Wheel Drive..............................2-31
Stabilitrak®System.........................................4-12
STABILITY SYS ACTIVE..................................3-70
STABILITY SYS DISABLED..............................3-70
Stalling on an Incline.......................................4-34
Starter Switch Check
.......................................6-13
Starting Your Engine
.......................................2-20
Steering
........................................................4-14Steering and Suspension Inspection..................6-15
Steering in Emergencies..................................4-15
Steering Tips..................................................4-14
Steering Wheel Controls, Audio.......................3-122
Step-Bumper Pad...........................................4-74
Stereo RCA Jacks.........................................3-117
Storage Areas
Center Console Storage Area........................2-54
Convenience Net.........................................2-56
Cupholder(s)...............................................2-54
Front Storage Area......................................2-54
Glove Box..................................................2-54
Luggage Carrier..........................................2-55
Rear Storage Area.......................................2-56
Storing a Flat or Spare Tire, Jack and Tools.......5-80
Stuck in Sand, Mud, Ice or Snow......................4-52
Sun Visors.....................................................2-15
Sunroof.........................................................2-57
Supplemental Brake Assist System...................... 4-9
T
Tachometer....................................................3-39
Taillamps.......................................................5-57
Temperature and Compass Display....................2-40
Temperature Display........................................2-43
Testing the Alarm............................................2-17
Theft-Deterrent, Radio....................................3-122
Theft-Deterrent Systems...................................2-16
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2003 - Yukon/Yukon XL