2003 GMC SIERRA rear view mirror

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-2
Rear Seats
............................................... 1-6
Safety Belts
.............................................. 1-7
Child Restraints
.......................................1-29
Air Bag Systems
......................................1-55
Restraint System Check
............................1-71
Features and Controls..................................... 2-1
Keys
........................................................ 2-2
Doors and Locks
....................................... 2-6
Windows
.................................................2-11
Theft-Deterrent Systems
............................2-13
Starting and Operating Your Vehicle
...........2-15
Mirrors
....................................................2-28
OnStar
®System
......................................2-33
HomeLink®Transmitter
.............................2-35
Storage Areas
.........................................2-39
Vehicle Personalization
.............................2-41
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-2
Climate Controls
......................................3-18
Warning Lights, Gages and Indicators
.........3-24
Driver Information Center (DIC)
..................3-42
Audio System(s)
.......................................3-56Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-46
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-4
Checking Things Under
the Hood
.............................................5-10
All-Wheel Drive
........................................5-45
Rear Axle
...............................................5-46
Front Axle
...............................................5-47
Bulb Replacement
....................................5-48
Windshield Wiper Blade Replacement
.........5-56
Tires
......................................................5-56
Appearance Care
.....................................5-82
Vehicle Identication
.................................5-90
Electrical System
......................................5-91
Capacities and Specications
.....................5-99
Normal Maintenance Replacement Parts
....5-100
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance Information.................... 7-1
Customer Assistance Information
.................. 7-2
Reporting Safety Defects
............................ 7-8
Index................................................................ 1
2003 GMC Sierra Denali Owner ManualM
2003 - Sierra Denali Owner Manual

In addition to the passenger sensing system, you may
use the AIR BAG OFF switch located on the instrument
panel to turn the air bag off. Never put a rear facing
child restraint in the right front passenger seat unless the
air bag is off. Here’s why.
{CAUTION:
A child in a rear-facing child restraint can be
seriously injured or killed if the right front
passenger’s air bag inflates. This is because the
back of the rear facing child restraint would be
very close to the inflating air bag. Be sure the air
bag is off before using a rear-facing child
restraint in the right front seat position.
Even though the passenger sensing system is
designed to turn off the passenger’s frontal air
bag if the system detects a rear-facing child
restraint, no system is fail-safe, and no one can
guarantee that an air bag will not deploy under
some unusual circumstance, even though it is
turned off. General Motors therefore
recommends that rear-facing child restraints be
secured in the rear seat whenever possible,
even if the air bag is off.You’ll be using the lap-shoulder belt. SeeTop Strap on
page 1-39if the child restraint has one. Be sure to
follow the instructions that came with the child restraint.
Secure the child in the child restraint when and as
the instructions say.
1. Your vehicle has a right front passenger’s air bag.
If you are using a rear-facing child restraint in this
seat, make sure the air bag is turned off. See
Air Bag Off Switch on page 1-61andPassenger
Sensing System on page 1-66. Always move
the seat as far back as it will go before securing the
child restraint in this seat. See“Seats”in the
Index.
When either the passenger sensing system and/or
the AIR BAG OFF switch has turned off the right
front passenger’s frontal air bag, the off indicator in
the passenger air bag status indicator on the
rearview mirror will light and stay lit when you turn
the ignition to RUN or START.
1-51
2003 - Sierra Denali

If your vehicle has the passenger sensing system and
you’re using a rear-facing child restraint in this seat,
check to be sure the right front passenger’s frontal air
bag is off before you begin to drive. If the air bag
has been turned off, the off indicator will light and stay
lit in the rearview mirror.
If the on indicator is lit, the passenger’s frontal air bag
has not been turned off by the passenger sensing
system. If this ever happens, turn the vehicle off,
unbuckle the safety belt and perform the steps to install
the rear-facing restraint again. After restarting the
vehicle, if the air bag still doesn’t turn off, install the
infant restraint in a rear seat position of the vehicle or
check to make sure the AIR BAG OFF switch has been
turned to off. SeeAir Bag Off Switch on page 1-61
andPassenger Sensing System on page 1-66.
{CAUTION:
If the air bag ON indicator comes on when you
have a rear-facing child restraint installed in
the right front passenger’s seat, it means that
the passenger sensing system has not turned
off the passenger’s frontal air bag. A child in a
rear-facing child restraint can be seriously
injured or killed if the right front passenger’s
air bag inflates. This is because the back of
the rear-facing child restraint would be very
close to the inflating air bag. Don’t use a
rear-facing child restraint in the right front
passenger’s seat unless the air bag is off.
To remove the child restraint, just unbuckle the vehicle’s
safety belt and let it go back all the way. The safety
belt will remove freely again and be ready to work for an
adult or larger child passenger.
If you were using a rear-facing child restraint and had
turned the air bag off with the switch, remember to turn
on the right front passenger’s air bag when you
remove the rear-facing child restraint from the vehicle
unless the person who will be sitting there is a member
of a passenger air bag risk group. SeeAir Bag Off
Switch on page 1-61.
1-54
2003 - Sierra Denali

Passenger Sensing System
If your rearview mirror has one of the indicators pictured
in the following illustrations, your vehicle has a
passenger sensing system. The indicator will be visible
when you turn your ignition key to RUN or START.
The words ON and OFF or the symbol for on and off,
will be visible on the rearview mirror during the system
check. When the system check is complete, either
the word ON or the word OFF, or the symbol for on or
the symbol for off will be visible. SeePassenger Air
Bag Status Indicator on page 3-31. If your rearview
mirror does not have either of the indicators pictured
below, then your vehicle does not have the passenger
sensing system.The passenger sensing system will turn off the right
front passenger’s frontal air bag under certain
conditions. The driver’s air bag and the side air bags
are not part of the passenger sensing system. In
addition to the passenger sensing system, your vehicle
also has an air bag off switch located on the instrument
panel as required by the government.
The passenger sensing system works with sensors that
are part of the right front passenger’s seat and safety
belt. The sensors are designed to detect the presence of
a properly seated occupant and determine if the
passenger’s frontal air bag should be enabled (may
inflate) or not.
Accident statistics show that children are safer if they
are restrained in the rear rather than the front seat.
General Motors, therefore, recommends that child
restraints be secured in a rear seat, including an infant
riding in a rear-facing infant seat, a child riding in a
forward-facing child seat and an older child riding in a
booster seat. Never put a child in rear-facing child Passenger Air Bag Status Indicator–United States
Passenger Air Bag Status Indicator−Canada
1-66
2003 - Sierra Denali

Keys...............................................................2-2
Remote Keyless Entry System.........................2-3
Remote Keyless Entry System Operation...........2-4
Doors and Locks.............................................2-6
Door Locks....................................................2-6
Power Door Locks..........................................2-7
Programmable Automatic
Door Locks................................................2-7
Rear Doors...................................................2-9
Tailgate.......................................................2-10
Windows........................................................2-11
Power Windows............................................2-12
Swing-Out Windows......................................2-12
Sun Visors...................................................2-13
Theft-Deterrent Systems..................................2-13
Content Theft-Deterrent.................................2-13
Passlock
®....................................................2-15
Starting and Operating Your Vehicle................2-15
New Vehicle Break-In....................................2-15
Ignition Positions
..........................................2-16
Starting Your Engine
.....................................2-17
Engine Coolant Heater
..................................2-18
Automatic Transmission Operation
...................2-19
All-Wheel Drive
............................................2-21
Parking Brake
..............................................2-22Shifting Into Park (P).....................................2-23
Shifting Out of Park (P).................................2-25
Parking Over Things That Burn.......................2-26
Engine Exhaust............................................2-26
Running Your Engine While You Are Parked. . . .2-27
Mirrors...........................................................2-28
Automatic Dimming Rearview Mirror with
OnStar
®, Compass and Temperature
Display....................................................2-28
Outside Power Mirrors...................................2-31
Outside Power Foldaway Mirrors.....................2-31
Outside Automatic Dimming Mirror..................2-32
Outside Curb View Assist Mirrors....................2-32
Outside Convex Mirror...................................2-32
Outside Heated Mirrors..................................2-32
OnStar
®System.............................................2-33
HomeLink®Transmitter...................................2-35
Programming the HomeLink®Transmitter.........2-35
Storage Areas................................................2-39
Glove Box...................................................2-39
Cupholder(s)................................................2-39
Center Console Storage Area.........................2-39
Tonneau Cover............................................2-39
Vehicle Personalization...................................2-41
Memory Seat...............................................2-41
Section 2 Features and Controls
2-1
2003 - Sierra Denali

Mirrors
Automatic Dimming Rearview Mirror
with OnStar
®, Compass and
Temperature Display
Your vehicle may have this feature. When on, an
electrochromic mirror automatically dims to the proper
level to minimize glare from lights behind you after dark.
The mirror also includes a duel display in the upper
right corner of the mirror face. The compass reading and
the outside temperature will both appear in the display
at the same time.
P(On/Off):This is the on/off button.
Temperature and Compass Display
Press the on/off button, located to the far left, brieyto
turn the comp/temp display on or off.
If the display reads CAL, you will need to calibrate the
compass. For more information on calibration, see
below.
To adjust between Fahrenheit and Celsius do the
following:
1. Press and hold the on/off button for approximately
four seconds until either aashing°F, or°C
appears.
2. Press the button again to change the display to the
desired unit of measurement. After approximately
four seconds of inactivity, the new unit will be locked
in and the compass/temperature display will
return.
Electrochromic Mirror Operation
The electrochromic (self dimming) mirror function is
turned on automatically each time the ignition is started.
To operate the electrochromic mirror do the following:
1. Make sure the green indicator light, located to
the left of the on/off button, is lit. If it’s not, press
and hold the on/off button for approximately
six seconds until the green light comes on,
indicating that the mirror is in electrochromic
(self dimming) mode.
2-28
2003 - Sierra Denali

Outside Automatic Dimming Mirror
The driver’s outside mirror will adjust for the glare of any
headlamps behind you. This feature is controlled by
the on and off settings on the electrochromic mirror.
See“Electrochromic Mirror Operation”underAutomatic
Dimming Rearview Mirror with OnStar
®, Compass
and Temperature Display on page 2-28.
Outside Curb View Assist Mirrors
If your vehicle has the optional memory package
you may have this feature.
The vehicle’s mirrors are capable of performing the curb
view assist mirror function. This feature will cause the
passenger’s and/or driver’s mirror to tilt to a preselected
position when the vehicle is in REVERSE (R). This
feature may be useful in allowing you to view the curb
when you are parallel parking. When the vehicle is
shifted out of REVERSE (R) and a short delay
has occurred, the passenger’s and/or driver’s mirror will
return to its original position.
To change the preselected tilt position, adjust the
mirrors to the desired position while the vehicle is in
REVERSE (R). When the vehicle is shifted out of
REVERSE (R), this new position is saved in memory as
the tilt position.
You may be able to enabled/disable this feature through
the Driver Information Center. SeeDriver Information
Center (DIC) on page 3-42.
Outside Convex Mirror
Your passenger’s side mirror is convex. A convex
mirror’s surface is curved so you can see more from the
driver’s seat.
{CAUTION:
A convex mirror can make things (like other
vehicles) look farther away than they really are.
If you cut too sharply into the right lane, you
could hit a vehicle on your right. Check your
inside mirror or glance over your shoulder
before changing lanes.
Outside Heated Mirrors
The outside rearview mirrors with this option have a
defrost mode.
To turn on the defrost feature, press the rear window
defogger button. See“Rear Window Defogger”
underDual Automatic Climate Control System on
page 3-18for further information.
2-32
2003 - Sierra Denali

{CAUTION:
If the air bag readiness light ever comes on
when you have turned off the air bag, it means
that something may be wrong with the air bag
system. The right front passenger’s air bag
could inate even though the switch is off. If
this ever happens, don’t let anyone whom the
national government has identied as a
member of a passenger air bag risk group sit
in the right front passenger’s position (for
example, don’t secure a rear-facing child
restraint in your vehicle) until you have your
vehicle serviced.
Passenger Air Bag Status Indicator
If your vehicle has the passenger sensing system
your rearview mirror will have a passenger air bag status
indicator.
When the ignition key is turned to RUN or START, the
passenger air bag status indicator will light ON and
OFF, or the symbol for on and off, for several seconds
as a system check. Then, after several more seconds,Passenger Air Bag Status Indicator–United States
Passenger Air Bag Status Indicator–Canada
3-31
2003 - Sierra Denali