2003 GMC YUKON DENALI air suspension

BATTERY
If the battery is not charging during operation, this
message will appear
on the DIG. Driving with this
problem could drain your battery. Have the electrical
system checked as soon as possible. Pressing the
select button will acknowledge this message and clear
it
from the DIC display.
SERVlCE AIR
If there is a problem with the air bag system, this
message will be displayed on the DIC. Have a qualified
technician inspect the system for problems. Pressing
the select button will acknowledge this message
and clear
it from the DIC display.
SERVICE BRAKE SYSTE
If a problem occurs with the brake system, this message
will appear on the DIC. If this message appears, stop
as soon as possible and turn
off the vehicle. Restart the
vehicle and check for the message
on the DIC display.
If the message is still displayed, or appears again when
you begin driving, the brake system needs service.
SERVICE 4W
If a problem occurs with the all-wheel drive system? this
message will appear on the DIG.
If this message
appears, stop as
soon as possible and turn off the
vehicle. Restart the vehicle and check for the message
3-54
on the DIC display. If the message is still displayed, or
appears again when you begin driving, the four
wheel drive system needs service.
ONTROL
If a problem occurs with the suspension system, this
message will appear on the DIC.
If this message
appears, stop and turn
off the vehicle. Restart the
vehicle and check for the message on the
DIC display.
If the message is still displayed, or appears again
when you begin driving, the suspension system needs
service.
TURN SIGNAL ON
If a turn signal is left on for 3/4 of a mile (1.2 km), this
message will appear on the display and you will hear a
chime. Move the turn signal/multifunction lever
to the
off position. Pressing the select button will acknowledge
this message and clear
it from the DIC display.
If the liftgate is open while the ignition is in
RUN, this
message will appear on the DIC and you will hear
a chime. Turn
off the vehicle and check the liftgate.
Restart the vehicle and check for the message on the
DlC display. Pressing the select button will acknowledge
this message and clear it from the
DIC display.

Automatic Level Control
The automatic level control rear suspension comes as a
part of the AutorideTMsuspension. See AutorideTM on
page
4-46.
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
10 minutes after the ignition key has been turned to
OFF. You may hear the air compressor operating when
the height is being adjusted.
If a weight-distributing hitch is being used, it is
recommended
to allow the shocks to inflate, thereby
leveling the vehicle prior to adjusting the height.
AutorideTM
The AutorideTM feature provides 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, IifVdive 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.
AutorideTM also interacts with the towlhaul mode that,
when activated, 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. See "Tow/Haul Mode"
under Towing a Trailer on page
4-47 for more
information.
4-46

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

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 48232-51 72
In Canada, please call us at 1-800-263-3777 (Englishj
or 1-800-263-7854 (French). Or, write:
General Motors of Canada Limited
Customer Communication Centre, 163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1
H 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 specifications for GM
transmissions, transaxles, and transfer cases.
RETAIL
SELL PRICE: $50.00
7-1 0

Inspection (cont.)
Instrument Panel
Steering
and Suspension
...............
Cluster ......................... .....................
Overview ..............................................
Instrument Panel Brightness ............................
Instrument Panel Fuse Block ...........................
Interior Lamps ...............................................
Interior Plastic Components .............................
Introduction
Transfer Case (All-Wheel Drive) Inspection
.....
. 6-14
. 3-29
... 3-4
. 3-16
. 5-88
. 3-16
. 5-79
. 6-14
Jump Starting
........................ 5-40
Key Lock Cylinders Service
........ ........... 6-1 1
Keys
........................................................... 2-3
Keyless
Entry System
....................................... 2-4
L
Lamps
Exterior
...................................................... 3-1 3
Interior
....................................................... 3-1 6
Lamps On Reminder
....................................... 3-14
Lap-Shoulder Belt
........................................... 1-31 LATCH
System
Child Restraints
........................................... 1-61
Securing a Child Restraint Designed for the
LATCH System
........................................ 1-63
Leather
......................................................... 5-79
LEFT REAR DOOR AJAR
................................ 3-56
Liftgate/LiftgIass
.............................. ........ 2-13
Liftglasdliftgate
.............................. .... 2-13
Light Leaving Your Vehicle With the Engine Running
...... 2-27
Air Bag Readiness
....................................... 3-31
Anti-Lock Brake System Warning
................... 3-35
Brake System Warning
................................. 3-34
Charging System
..................................... 3-33
Cruise Control
................. ................ 3-41
Low Fuel Warning
................................... 3-42
Malfunction Indicator
................................ 3-38
Passenger Air Bag Status Indicator
............ 3-32
Safety Belt Reminder
................................... 3-30
Security
..................................................... 3-41
Tow/Haul Mode
........................................... 3-42
Traction
Off ................................................ 3-36
Listening
to a DVD ..................................... 3-72
Loading Your Vehicle
................................... 4-44
Lockout Protection
.......................................... 2-13
Locks Delayed Locking
........................................... 2-9
Door
........................................................... 2-8
Lockout Protection
....................................... 2-13
Power Door
.................................................. 2-9
8

Seats
50/50 Split Bench Seat ................................. 1-1 1
60/40 Split Bench Seat
.................................. 1-9
Bench Seat
................................................ 1-17
Bucket Seats,
Rear ...................................... 1-22
Head Restraints ............................................ 1-6
Heated Seats
............................................... 1-4
Heated Seats, Rear
....................................... 1-8
Memory
..................................................... 2-47
Power Lumbar
.............................................. 1-4
Power Seats
................................................. 1-3
Rear Seat Operation
...................................... 1-7
Reclining Seatbacks
...................................... 1-5
Second Row
.................................................. 1-66
Second Row
- Lap-Shoulder Belt ...................... 1-39
Securing a Child Restraint
Center Rear Seat Position
............................ 1-65
Designed for the LATCH System
................... 1-63
Rear Outside Seat Position
........................... 1-63
Right Front Seat Position
.............................. 1-68
Select Button
................................................. 3-44
Service
........................................................... 5-3
Adding Equipment
to the Outside of
Your Vehicle
.............................................. 5-4
Doing Your Own Work
................................... 5-3
Engine Soon Light
.................... , ........... 3-38
Publications Ordering Information
.... ........ 7-10
SERVICE
4WD ............................................ 3-54
SERVICE AIR BAG
......................................... 3-54
Security Light
................................................. 3-41 SERVICE BRAKE
SYSTEM
............................. 3-54
Service Bulletins
............................................. 7-11
Service Manuals
............................................. 7-10
SERVICE RIDE CONTROL
.............................. 3-54
SERVlCE STABILITY ...................................... 3-57
Setting Preset PTYs (RDS Only) ....................... 3-64
Setting Preset Stations
.................................... 3-61
Setting the Time
............................................. 3-58
Setting the Tone (BasslTreble)
.............. ..... 3-62
Sheet Metal Damage
....................................... 5-87
Shifting Into Park (P)
....................................... 2-26
Side Impact Air Bags
....................................... 1-77
Skidding
........................................................ 4-15
Spare Tire
..................................................... 5-81
Specifications, Capacities
............................. 5-96
Speedometer
.................................................. 3-30
Split Bench Seat
(50/50) .................................. 1-11
Split Bench Seat (60140)
.................................... 1-9
Stabilitrak System 4-9
Shifting
Out of
Park (P) ................................... 2-28
Some Other Rainy Weather Tips
....................... 4-31
Spare Tire Check
............................................ 6-11
Speaker Covers
.......................................... 5-80
8 ...........................................
STABILITY SYS ACTIVE .................................. 3-56
STABILITY SYS DISABLED
.............................. 3-57
Starter Switch Check
....................................... 6-12
Starting Your Engine
....................................... 2-19
Steering
........................................................ 4-11
Steering and Suspension Inspection
.................. 6-14
13