2003 GMC YUKON DENALI brake

These are some examples of vehicle symbols you may find on your vehicle:
CAUTION
POSSIBLE
INJURY
PROTECT EYES BY
SHIELDING
CAUSTIC
BATTERY
ACID COULD CAUSE
BURNS
AVO ID
SPARKS
OR
FLAMES
SPARK
OR
FLAME '\I/'
COULD
EXPLODE BATTERY LATCH BOTH LAP AND
SHOULDER BELTS TO
PROTECT OCCUPANT
4
DO NOT TWIST SAFETY
BELT WHEN ATTACHING
FASTEN SEAT
BELTS
MOVE SEAT DO NOT INSTALL
A REAR-FACING
CHILD RESTRAINT
SECURE IN THIS SEATING
CHILD SEAT POSITION
FULLY
c REARWARD+ /3
PULL BELT DO NOT INSTALL A
COMPLETELY
THEN SECURE
CHILD SEAT FORWARD-FACING
CHILD RESTRAINT IN THIS SEATING
POSITION
POWER DOOR LOCK
WINDOW UNLOCK LIGHTING
- MASTER SWITCH u- 0 ,
LAMPS #O
ENGINE
COOLANT
-FA TEMP -
CHARGING Fl
BATTERY
SYSTEM
ENGINE OIL PRESSURE
9%77
ANTI-LOCK (@)
BRAKES
FUSE BOX
ACCESS
ENGINE
COOLANT FAN
OWNER'S MANUAL
SERVICE
SERVICE MANUAL
V

In many crashes severe enough to inflate an air bag,
windshields are broken by vehicle deformation.
Additional windshield breakage may also occur from the
right front passenger air bag.
Air bags are designed to inflate only once. After an
air bag inflates, you’ll need some new parts for
your air bag system. If you don’t get them, the air
bag system won’t be there to help protect you
in another crash.
A new system will include air bag
modules and possibly other parts. The service
manual for your vehicle covers the need to replace
other parts.
Your vehicle is equipped with electronic frontal
sensors which help the sensing system distinguish
between a moderate and a more severe frontal
impact. Your vehicle is also equipped with a crash
sensing and diagnostic module, which records
information about the frontal air bag system. The
module records information about the readiness of
the system and when the system commands
are bag inflation. It records the status
of the driver’s safety belt usage in
a crash in which the air bag
deploys or a crash in which the air bag nearly
deploys. The module also records speed, engine
RPM, brake and throttle data.
Let only qualified technicians work on your air bag
systems. Improper service can mean that an air
bag system won’t work properly. See your dealer for
service.
Notice: If you damage the covering for the driver’s
or the right front passenger’s air bag, or the air
bag covering
on the driver’s and right front
passenger’s seatback, the bag may not work
properly. You may have to replace the air bag
module in the steering wheel, both the air bag
module and the instrument panel for the right front
passenger’s air bag, or both the air bag module
and seatback for the driver’s and right front passenger’s side impact air bag.
Do not open or
break the air bag coverings.
1-80

Section 2 Features and Controls
Keys ............................................................... 2.3
Remote Keyless Entry System
......................... 2.4
Remote Keyless Entry System Operation
........... 2.5
Doors and Locks ............................................. 2.8
Door Locks
................................................. 2.8
Power Door Locks
.......... .... ............. 2.9
Delayed Locking
............................................. 2.9
Programmable Automatic
Door Locks
............................................... 2.10
Rear Door Security Locks
.............................. 2.12
Lockout Protection
........................................ 2.13
LiftgateILiftglass
..................................... 2.13
Windows ........................................................ 2.14
Power Windows
............................................ 2.15
Sun Visors
................................................... 2.15
Theft-Deterrent Systems .................................. 2.16
Content Theft-Deterrent
................................. 2.16
Passlock@
.................................................... 2.17
Starting and Operating Your Vehicle ................ 2.18
New Vehicle Break-In
.................................... 2-18
Starting Your Engine
..................................... 2.19
Engine Coolant Heater
.................................. 2.21
Automatic Transmission Operation
................... 2.22
Shifting Into Park (P)
................. , ........ 2.26
Shifting Out of Park (P)
..................... , ........ 2-28
Parking Over Things That Burn
....................... 2-29
Engine Exhaust
............................................ 2.29
Running Your Engine While You Are Parked
.... 2-30
Ignition Positions
.......................................... 2.18
Adjustable Throttle and Brake Pedal
............... -2-20
Parking Brake
.............................. ..... 2.25
2-
1

Starting and Operating Your
Vehicle
New Vehicle Break-In
Notice: Your vehicle doesn’t need an elaborate
“break-in.’’ But
it will perform better in the long run
if you follow these guidelines:
e
e
Keep your speed at 55 mph (88 km/h) or less for
the first
500 miles (805 km).
Don’t drive at any one speed
- fast or
slow
- for the first 500 miles (805 km).
Don’t make full-throttle starts.
Avoid making hard stops for the first
200 miles
(322 km) or so. During this time your new
brake linings aren’t yet broken in. Hard stops
with new linings can mean premature wear and
earlier replacement. Follow this breaking-in
guideline every time you get new brake linings.
Don’t tow a trailer during break-in. See “Towing
a Trailer” in the Index for more information.
Ignition Positions
With your key in the ignition switch you can turn it to
four different positions.
I C
A-
A (LOCK): This position locks your ignition and
transmission. It’s a theft-deterrent feature. You
will only
be able
to remove your key when the ignition is
turned to
LOCK.
2-1 8

2. If your engine still won’t start (or starts but then
stops), it could be flooded with too much gasoline.
Try pushing your accelerator pedal all the way to the
floor and holding it there as you hold the key in START for about three seconds. When the engine
starts, let go of the key and accelerator. If the
vehicle starts briefly but then stops again, do the
same thing, but this time keep the pedal down
for five or six seconds. This clears the extra
gasoline from the engine.
Notice: Your engine is designed to work with the
electronics in your vehicle.
If you add electrical
parts or accessories, you could change the way the
engine operates. Before adding electrical equipment,
check with your dealer. If you don’t, your engine
might not perform properly.
Adjustable Throttle and Brake Pedal
If your vehicle has this feature, you can change the
position of the throttle and brake pedals. This feature is
designed for shorter drivers, since the pedals cannot
move farther away from the standard position, but can
move forward for better pedal reach. This feature
can be programmed to work with the memory function
(if equipped) on your vehicle. See Memory Seat on
page 2-47.
The vehicle must be in PARK (P) for this feature to
operate.
The buttons used to adjust
the pedals are located on
the driver’s side door panel.
Press the button closest to you to move the pedals
closer to your body. Press the button farthest from you
to move the pedals away from your body.
2-20

Automatic Transmission Operation
Your vehicle is equipped with an automatic transmission
and features an electronic shift position indicator
located within the instrument panel cluster.
There are several different positions for your shift lever.
PARK
(P): This position locks your drive wheels. It’s
the best position to use when you start your engine
because your -1icle
c ’t move easily.
It is aangerous to get out of your venlcle il
shift lever is not fully in PARK (P) with the
parking brake firmly set. Your vehicle can roll.
Don’t leave your vehicle when the engine is
running unless you have to.
If you have left the
engine running, the vehicle can move
suddenly. You or others could be injured.
CAUTION: (Continued)
o be sure your vehicle won’t move, even
when you’re on fairly level ground, always set
your parking brake and move the shift lever to PARK (P). See “Shifting Into Park (P)” in the
Index.
If you’re pulling a trailer, see “Towing a
Trailer” in the Index.
REVERSE (R): Use this gear to back up.
Notices Shifting to REVERSE (R) while your vehicle
is moving forward could damage your transmission.
Shift to REVERSE
(R) only after your vehicle is
stopped.
To rock your vehicle back and forth to get out of snow,
ice or sand without damaging your transmission,
see If
You Are Stuck: In Sand, Mud, Ice or Snow on
page 4-4 1.
NEUTRAL (N): In this position, your engine doesn’t
connect with the wheels. To restart when you’re already
moving, use NEUTRAL
(N) only.
2-22

Shifting into a drive gear while your engine is
“racing” (running at high speed) is dangerous.
Unless your foot is firmly on the brake pedal,
your vehicle could move very rapidly. You
could lose control and hit people or objects.
Don’t shift into a drive gear while your engine
is racing.
Notices Damage to your transmission caused by
shifting out of PARK (P) or NEUTRAL (N) with
the engine racing isn’t covered by your warranty.
DRIVE (D):
This position is for normal driving. If
you need more power for passing, and you’re:
accelerator pedal about halfway down.
accelerator all the way down.
0 Going less than about 35 mph (55 km/h), push your
Going about 35 mph (55 km/h) or more, push the
You’ll shift down
to the next gear and have more power.
DRIVE (D) can be used when towing a trailer, carrying
a heavy load, driving on steep hills or for off-road driving.
You may want
to shift the transmission to THIRD (3)
or, if necessary, a lower gear selection if the
transmission shifts
too often.
THIRD (3): This position is also used for normal driving,
however it offers more power and lower fuel economy
than DRIVE (D).
SECOND (2): This position gives you more power but
lower fuel economy. You can use SECOND
(2) on
hills.
It can help control your speed as you go down
steep mountain roads, but then you would also want
to
use your brakes off and on.
If you manually select SECOND
(2), the transmission
will drive in second gear. You may use this feature
for reducing the speed of the rear wheels when you are
trying
to start your vehicle from a stop on slippery
road surfaces. Once the vehicle
is moving, shift into
DRIVE
(D).
FIRST (1): This position gives you even more power,
but lower fuel economy than SECOND
(2). You can use
it on very steep hills, or in deep snow or mud. If the
shift lever is put in FIRST
(1) while the vehicle is moving
forward, the vehicle won’t shift into first gear until the
vehicle is going slowly enough.
2-23

Notice: If your wheels won’t turn, don’t try to drive.
This might happen
if you were stuck in very deep
sand or mud or were up against
a solid object. You
could damage your transmission. Also, if you
stop when going uphill, don’t hold your vehicle there
with only the accelerator pedal. This could overheat
and damage the transmission. Use your brakes
or shift into
PARK (P) to hold your vehicle in
position on
a hill.
On cold days, approximately
32°F (OOC) or colder, your
transmission is designed
to shift differently until the
engine reaches normal operating temperature. This is
intended
to improve heater performance.
Tow/HauI Mode
Your vehicle is equipped with a tow/haul mode. The
button is located on the end
of the column shift lever.
You can use this feature
to assist when towing or
hauling a heavy load. See “Tow/Haul Mode” under
Towing
a Trailer on page 4-47 for more information.
The tow/haul mode also interacts with the AutorideTM
feature
to enhance the ride when trailering or with
a loaded vehicle. See AutorideTM on page
4-46.
2-24